diff --git a/duniterpy/__init__.py b/duniterpy/__init__.py
index 7568cd46659295b6939b6e7958702be2d4bbded9..e5bf3cd90911d75b0a3267f674c7efed3d30f5f6 100644
--- a/duniterpy/__init__.py
+++ b/duniterpy/__init__.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 __author__ = "Caner Candan & inso & vit"
 __version__ = "0.62.0"
diff --git a/duniterpy/api/__init__.py b/duniterpy/api/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/duniterpy/api/__init__.py
+++ b/duniterpy/api/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/duniterpy/api/bma/__init__.py b/duniterpy/api/bma/__init__.py
index fdde5b5c854ea8e131f7729b3e7217749629303b..18fee245c53c2632cf70c5264f42c60d29e8e10a 100644
--- a/duniterpy/api/bma/__init__.py
+++ b/duniterpy/api/bma/__init__.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 from . import network, blockchain, tx, wot, node, ud, ws
diff --git a/duniterpy/api/bma/blockchain.py b/duniterpy/api/bma/blockchain.py
index 57faf3c232f155513ab2fb09f65d8c9b74dc7768..c0e26c2c424f90ef6b37fa093409836777576da2 100644
--- a/duniterpy/api/bma/blockchain.py
+++ b/duniterpy/api/bma/blockchain.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 from typing import Union
diff --git a/duniterpy/api/bma/network.py b/duniterpy/api/bma/network.py
index b29eb6e41a3fc5932b6cc8c48024311abd006c65..eb8f6176e4fa2b0849691e531e6be802216dc1a1 100644
--- a/duniterpy/api/bma/network.py
+++ b/duniterpy/api/bma/network.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/bma/node.py b/duniterpy/api/bma/node.py
index 92da3a35f4d670086cbf661e5a108aba3a5d6855..573c3669697e4ba238b66e776a6c18527920ad78 100644
--- a/duniterpy/api/bma/node.py
+++ b/duniterpy/api/bma/node.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/bma/tx.py b/duniterpy/api/bma/tx.py
index 06c9876a015388775fd6629b9aafd9424de41942..abbab2d570a8196fff19d315dfb4583c6db0b3ff 100644
--- a/duniterpy/api/bma/tx.py
+++ b/duniterpy/api/bma/tx.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/bma/ud.py b/duniterpy/api/bma/ud.py
index 7ace432a8130db864547a1307b0144e4481f5201..b4cb2e7053f4a9b86a304a39b574295c2ce270cc 100644
--- a/duniterpy/api/bma/ud.py
+++ b/duniterpy/api/bma/ud.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/bma/wot.py b/duniterpy/api/bma/wot.py
index 4c01fa4a27a0043dd4745ab5b50de398cafb6889..64946f47464195b2202853d6a6030951ab587e27 100644
--- a/duniterpy/api/bma/wot.py
+++ b/duniterpy/api/bma/wot.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/bma/ws.py b/duniterpy/api/bma/ws.py
index 624b8329ebc0de773963036298d514b744a530cf..adbfcc911d5c4754e934a5eb157542dff3c1f21c 100644
--- a/duniterpy/api/bma/ws.py
+++ b/duniterpy/api/bma/ws.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/client.py b/duniterpy/api/client.py
index 771240ca0c321a2de3e1040c8797719d2c6b15c6..fe0233571e7edad5e9af237d03c157cac48ff269 100644
--- a/duniterpy/api/client.py
+++ b/duniterpy/api/client.py
@@ -1,19 +1,18 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import copy
 import json
 import logging
diff --git a/duniterpy/api/elasticsearch/__init__.py b/duniterpy/api/elasticsearch/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/duniterpy/api/elasticsearch/__init__.py
+++ b/duniterpy/api/elasticsearch/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/duniterpy/api/endpoint.py b/duniterpy/api/endpoint.py
index 135172fc1e7e4a9ae0829bcb69234caaa3a84a4f..c0198cc80b44eb7055cbfc22c563c09f28425f26 100644
--- a/duniterpy/api/endpoint.py
+++ b/duniterpy/api/endpoint.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import Any, Optional, TypeVar, Type, Dict
diff --git a/duniterpy/api/errors.py b/duniterpy/api/errors.py
index fda709452c09109f430df833ddf7da4e5441deea..1721292ed88013b5c2a0067ac1675c871a429b3b 100644
--- a/duniterpy/api/errors.py
+++ b/duniterpy/api/errors.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 class DuniterError(Exception):
diff --git a/duniterpy/api/ws2p/__init__.py b/duniterpy/api/ws2p/__init__.py
index 45aa7e01b09323d5dca10b01e7c3de31319865cd..3404cf04731273d9a3d5c466f2767ea25af8a928 100644
--- a/duniterpy/api/ws2p/__init__.py
+++ b/duniterpy/api/ws2p/__init__.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 from . import network, requests
diff --git a/duniterpy/api/ws2p/network.py b/duniterpy/api/ws2p/network.py
index d309fbe832973659c9da32b0ae2d8be26042137c..693c454b9ddb0c70be6a3227a09f019936dddf7e 100644
--- a/duniterpy/api/ws2p/network.py
+++ b/duniterpy/api/ws2p/network.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
 
diff --git a/duniterpy/api/ws2p/requests.py b/duniterpy/api/ws2p/requests.py
index 1679277592f0b0ba4458132664f65cf937ae0e6e..0075ca3e678f95dd7802e53ab9353739098d83f7 100644
--- a/duniterpy/api/ws2p/requests.py
+++ b/duniterpy/api/ws2p/requests.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 import re
diff --git a/duniterpy/constants.py b/duniterpy/constants.py
index 1e182dc26afe5fb18f1d18650aacfdda5c287d9b..fe1d5cb4d247159c6a4181da6d1da071fc030872 100644
--- a/duniterpy/constants.py
+++ b/duniterpy/constants.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 UID_REGEX = "[A-Za-z0-9_-]{2,100}"
 PUBKEY_REGEX = "(?![OIl])[1-9A-Za-z]{42,45}"
diff --git a/duniterpy/documents/__init__.py b/duniterpy/documents/__init__.py
index 9ce20d1d63b3bc6a08ad0b761d2e80425912ad32..6422cae317a736fb44d13b02cc9155b532e8ae83 100644
--- a/duniterpy/documents/__init__.py
+++ b/duniterpy/documents/__init__.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .block import Block
 from .block_uid import BlockUID, block_uid
diff --git a/duniterpy/documents/block.py b/duniterpy/documents/block.py
index 2c304758a0bc6a7fc9eff0f734633465aab1bb65..6e11e20e48f239f14685da181026125a97d17ccd 100644
--- a/duniterpy/documents/block.py
+++ b/duniterpy/documents/block.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import hashlib
diff --git a/duniterpy/documents/block_uid.py b/duniterpy/documents/block_uid.py
index bf3f816218c2335d138993480fdc23cb270ff5e3..3974c0039c1ad8698b6d81faba36eaec1da42168 100644
--- a/duniterpy/documents/block_uid.py
+++ b/duniterpy/documents/block_uid.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import Union, TypeVar, Type
diff --git a/duniterpy/documents/certification.py b/duniterpy/documents/certification.py
index 04714a824201a9711184f822127ac179571b3b97..78afe66b1aa392729dba32dbcaa05f0f615c7894 100644
--- a/duniterpy/documents/certification.py
+++ b/duniterpy/documents/certification.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import logging
diff --git a/duniterpy/documents/crc_pubkey.py b/duniterpy/documents/crc_pubkey.py
index 834c30ec67c3c77b918e1dcdfc2b4a37dfd54aad..fb2a7c72cc52d94751c33d9a8add6ca2a7d2b8c6 100644
--- a/duniterpy/documents/crc_pubkey.py
+++ b/duniterpy/documents/crc_pubkey.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import TypeVar, Type
 
diff --git a/duniterpy/documents/document.py b/duniterpy/documents/document.py
index f14a4d19a90eded523366a890aff12b5705dc096..136b0433584d489903301cb4fc0ef7b32c7e8302 100644
--- a/duniterpy/documents/document.py
+++ b/duniterpy/documents/document.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import hashlib
diff --git a/duniterpy/documents/identity.py b/duniterpy/documents/identity.py
index aa8aaf17567fe8d51d005f7e886f99928ffe0ffe..07b456ce405eab9a4fbb7c0042bdb1e14ab792ed 100644
--- a/duniterpy/documents/identity.py
+++ b/duniterpy/documents/identity.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import Optional, TypeVar, Type
diff --git a/duniterpy/documents/membership.py b/duniterpy/documents/membership.py
index 3e62f874f8c6a88e0a546d11c644950e254d5800..2573d07738d49c82d18ed1c3277b9bad96d7d58c 100644
--- a/duniterpy/documents/membership.py
+++ b/duniterpy/documents/membership.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import TypeVar, Type, Optional
diff --git a/duniterpy/documents/peer.py b/duniterpy/documents/peer.py
index 2a382e91d67ef3f4ab9325e85681b6ea497a50a4..b6f13799786a93a5df725dba37bede6fadbf02b6 100644
--- a/duniterpy/documents/peer.py
+++ b/duniterpy/documents/peer.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import TypeVar, List, Type
diff --git a/duniterpy/documents/revocation.py b/duniterpy/documents/revocation.py
index 0baab0e9f78f38d53ef1c9d5444f72a3ebe92439..0f7d3fe91e42f0b426ba3353c6816c48e9185c68 100644
--- a/duniterpy/documents/revocation.py
+++ b/duniterpy/documents/revocation.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import re
diff --git a/duniterpy/documents/transaction.py b/duniterpy/documents/transaction.py
index 4f64007038bf993c3e70be35ef364f54b410db3e..887b6d3c91930ccc0bd1731e7b0b8b0fa2f33708 100644
--- a/duniterpy/documents/transaction.py
+++ b/duniterpy/documents/transaction.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 from typing import TypeVar, List, Any, Type, Optional, Dict, Union, Tuple
diff --git a/duniterpy/documents/ws2p/__init__.py b/duniterpy/documents/ws2p/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/duniterpy/documents/ws2p/__init__.py
+++ b/duniterpy/documents/ws2p/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/duniterpy/documents/ws2p/heads.py b/duniterpy/documents/ws2p/heads.py
index 2016f793acb4b72a6d28d7d39daa182ca40a2031..17404cc72a6e3dd362653b6e8a55d27a08ab3a85 100644
--- a/duniterpy/documents/ws2p/heads.py
+++ b/duniterpy/documents/ws2p/heads.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
 import attr
diff --git a/duniterpy/documents/ws2p/messages.py b/duniterpy/documents/ws2p/messages.py
index d790a496f458bd858d6696093cc5fe9af593d9f4..02ab7069c3ea1548ba9ecfeea31b237bdc052d7d 100644
--- a/duniterpy/documents/ws2p/messages.py
+++ b/duniterpy/documents/ws2p/messages.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 
diff --git a/duniterpy/grammars/__init__.py b/duniterpy/grammars/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/duniterpy/grammars/__init__.py
+++ b/duniterpy/grammars/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/duniterpy/grammars/output.py b/duniterpy/grammars/output.py
index e754bfbef5fb5e4a35795440801d0646f32787eb..9a0cb6fbf8b35492d8fa937336cb63b7a6023552 100644
--- a/duniterpy/grammars/output.py
+++ b/duniterpy/grammars/output.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import Optional, TypeVar, Type, Any, Union
 
diff --git a/duniterpy/helpers/__init__.py b/duniterpy/helpers/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/duniterpy/helpers/__init__.py
+++ b/duniterpy/helpers/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/duniterpy/helpers/blockchain.py b/duniterpy/helpers/blockchain.py
index 46f4fdeed362165a4b63eedcb17539f6e95f026e..af6ea34bc6c5f1f0173db97f23f17bfe9ed8f89b 100644
--- a/duniterpy/helpers/blockchain.py
+++ b/duniterpy/helpers/blockchain.py
@@ -1,3 +1,18 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 """
 Copyright  2014-2020 Vincent Texier <vit@free.fr>
 
diff --git a/duniterpy/helpers/money.py b/duniterpy/helpers/money.py
index 6f9076ebb851a541fe091c6669f4e93f60ee2c11..36f540627c0d7ff9e7b94559d02b0b11ad9a4214 100644
--- a/duniterpy/helpers/money.py
+++ b/duniterpy/helpers/money.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import Union, Any
 from duniterpy.grammars.output import SIG, CSV, CLTV, XHX, Condition
diff --git a/duniterpy/helpers/network.py b/duniterpy/helpers/network.py
index af15122335c4378d126f127fc17a8fa4676a4e93..f136d8b6bf0b280cde7bf78d484f238bb61be905 100644
--- a/duniterpy/helpers/network.py
+++ b/duniterpy/helpers/network.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import List, Dict, Any
 
diff --git a/duniterpy/helpers/ws2p.py b/duniterpy/helpers/ws2p.py
index 80e671f0607321024d6de6f674d724bea93f6575..2efc656cbf10e63161d494bba1964603df1d0106 100644
--- a/duniterpy/helpers/ws2p.py
+++ b/duniterpy/helpers/ws2p.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import jsonschema
 from typing import Union
diff --git a/duniterpy/key/__init__.py b/duniterpy/key/__init__.py
index a3cf1acdd162cde23f0940053039ccf540075ca7..2966e76d850da611b8abcf76a8e04f7b1551c69a 100644
--- a/duniterpy/key/__init__.py
+++ b/duniterpy/key/__init__.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .signing_key import SigningKey
 from .verifying_key import VerifyingKey
diff --git a/duniterpy/key/ascii_armor.py b/duniterpy/key/ascii_armor.py
index 154eab3e214d0319756f8771395304f77908ed2e..640ec981884f82cebaa13bfc9b984c58564aa4cd 100644
--- a/duniterpy/key/ascii_armor.py
+++ b/duniterpy/key/ascii_armor.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import libnacl
diff --git a/duniterpy/key/base58.py b/duniterpy/key/base58.py
index 5b1afe2c72c2933ebd27402d6a46d946d0c28406..9a786d6e400682e603a2890705e3423329cd815a 100644
--- a/duniterpy/key/base58.py
+++ b/duniterpy/key/base58.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import Union
 
diff --git a/duniterpy/key/constants.py b/duniterpy/key/constants.py
index 40328fdc26fcfdf01cae3452ab2cb12c3e4b90fc..ac074a42d81cf6a1b963d59b8e90edeb928ca9bd 100644
--- a/duniterpy/key/constants.py
+++ b/duniterpy/key/constants.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Libnacl
 crypto_sign_BYTES = 64
diff --git a/duniterpy/key/encryption_key.py b/duniterpy/key/encryption_key.py
index b575bca4744ec9d9c4400f2e53713ee8b3070015..7c155879666f77628c28bbb4f278258ed297b65f 100644
--- a/duniterpy/key/encryption_key.py
+++ b/duniterpy/key/encryption_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from typing import Union, Optional
 
diff --git a/duniterpy/key/scrypt_params.py b/duniterpy/key/scrypt_params.py
index 95c036acbbe48abae820b17dc102554c19876f44..2b1f4599cf44c01b7fa10cc0a2dc799ab7e88b54 100644
--- a/duniterpy/key/scrypt_params.py
+++ b/duniterpy/key/scrypt_params.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .constants import SCRYPT_PARAMS
 
diff --git a/duniterpy/key/signing_key.py b/duniterpy/key/signing_key.py
index 547163f9e3e7567028e8fcef3ec9deffe567bac2..6ec5adac06748a2ff2abdf2547e4c1b348574870 100644
--- a/duniterpy/key/signing_key.py
+++ b/duniterpy/key/signing_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import re
diff --git a/duniterpy/key/verifying_key.py b/duniterpy/key/verifying_key.py
index 5577a18cd9e771a2a6d1f1fccfb1eb12e4b52420..fdc5cee3d0af03615c24b96ffe08b9e37425fff7 100644
--- a/duniterpy/key/verifying_key.py
+++ b/duniterpy/key/verifying_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 from typing import Any
diff --git a/duniterpy/tools.py b/duniterpy/tools.py
index a613e642defd524876c65534bfd12529b44e5504..c833cc141af461d5927812edf07230f24306af26 100644
--- a/duniterpy/tools.py
+++ b/duniterpy/tools.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import uuid
 from typing import Union
diff --git a/examples/create_public_key.py b/examples/create_public_key.py
index cd4345b7bf41d78248f3e9901fbe798c38df8e92..c95ff9e2f8333f068b0a4626829eaaa2f4902987 100644
--- a/examples/create_public_key.py
+++ b/examples/create_public_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 from duniterpy.key import SigningKey
diff --git a/examples/listen_ws2p.py b/examples/listen_ws2p.py
index ef4d9057ba642d9ecb3d61aa683dde8d9de1c455..a74c588e5e276f8c3492cff13e877037beabab1d 100644
--- a/examples/listen_ws2p.py
+++ b/examples/listen_ws2p.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 import jsonschema
diff --git a/examples/load_binary_encrypted_message.py b/examples/load_binary_encrypted_message.py
index 3d1e9ab0151adaeaf65cdecdda2ffeea409115c0..d16b2b2e04d843b1a1b4f3d95f3ea24573636e1a 100644
--- a/examples/load_binary_encrypted_message.py
+++ b/examples/load_binary_encrypted_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import sys
diff --git a/examples/load_binary_signed_message.py b/examples/load_binary_signed_message.py
index 7d58e905864ef2f33075a3938a8a354690023ea4..c31869442e02d5b3bb06a3112f9b635b8d79075e 100644
--- a/examples/load_binary_signed_message.py
+++ b/examples/load_binary_signed_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import sys
 
diff --git a/examples/load_cleartext_ascii_armor_message.py b/examples/load_cleartext_ascii_armor_message.py
index 4952c340e9c505dcd0c294000af1ec07e084fb5a..0e607c60daba962d6e934d930ee767528006b3cd 100644
--- a/examples/load_cleartext_ascii_armor_message.py
+++ b/examples/load_cleartext_ascii_armor_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import AsciiArmor
 
diff --git a/examples/load_credentials_file.py b/examples/load_credentials_file.py
index 903b499ef45b2f123bd1493a2720746769bd428e..e4dec58ff5c3621674dcf58a3dced5ed1ec80859 100644
--- a/examples/load_credentials_file.py
+++ b/examples/load_credentials_file.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import sys
 
diff --git a/examples/load_encrypted_ascii_armor_message.py b/examples/load_encrypted_ascii_armor_message.py
index 7c3600b4b2eb3be56ec222af7e7e373f30322c14..e247608482ef25094571b9d81ac52fd41b755525 100644
--- a/examples/load_encrypted_ascii_armor_message.py
+++ b/examples/load_encrypted_ascii_armor_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 
diff --git a/examples/load_local_blockchain.py b/examples/load_local_blockchain.py
index 212f72e8de14d905840e87b086743d6359a9b39a..2b95c1d52b4b334c2cafb3e2f6c58223b286dc04 100644
--- a/examples/load_local_blockchain.py
+++ b/examples/load_local_blockchain.py
@@ -1,3 +1,18 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 """
 Copyright  2014-2020 Vincent Texier <vit@free.fr>
 
diff --git a/examples/load_scuttlebutt_file.py b/examples/load_scuttlebutt_file.py
index 46fbf0de64ee30ead01a29fe085c7ce8eaf7df6e..bc07090baaa747104fa46914cb3be789edf37fc5 100644
--- a/examples/load_scuttlebutt_file.py
+++ b/examples/load_scuttlebutt_file.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import sys
 
diff --git a/examples/request_available_nodes.py b/examples/request_available_nodes.py
index 7b806d002c6646da2ecc520a645be2a5e9c905a4..91b580387d02c5d0bdb057ba784b0ccfd4d8eed4 100644
--- a/examples/request_available_nodes.py
+++ b/examples/request_available_nodes.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.helpers import network
 from duniterpy.api.client import Client
diff --git a/examples/request_data.py b/examples/request_data.py
index caea39bfda3558558889cd2f45ccdefbb09abcf4..62b892ff5e7c49b747ea120fd0be74ee62ff5c52 100644
--- a/examples/request_data.py
+++ b/examples/request_data.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.api.client import Client, RESPONSE_HTTP
 from duniterpy.api import bma
diff --git a/examples/request_data_async.py b/examples/request_data_async.py
index 1633ca1a227dbce2cb42b0abf8ee98a046e79159..63c277923292b6c10c750c89cf6961fd28212da9 100644
--- a/examples/request_data_async.py
+++ b/examples/request_data_async.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import asyncio
 
diff --git a/examples/request_data_elasticsearch.py b/examples/request_data_elasticsearch.py
index 543d8e8bab4702c1dbcdcb5e173dca92b516cdcf..2cd9feb71702a0450660fc5f09a5e356e90548bb 100644
--- a/examples/request_data_elasticsearch.py
+++ b/examples/request_data_elasticsearch.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.api.client import Client
 
diff --git a/examples/request_data_graphql.py b/examples/request_data_graphql.py
index b486addac08792f86fbfd61a4dcd0b54cb5a9c11..0d2ec371f2be9dcc8dcc4603e4091b3f196e1586 100644
--- a/examples/request_data_graphql.py
+++ b/examples/request_data_graphql.py
@@ -1,3 +1,18 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import json
 
 from duniterpy.api.client import Client
diff --git a/examples/request_web_socket_block.py b/examples/request_web_socket_block.py
index 16583c367c7c19e27bbca2ca31044a40e391e6a1..a9df4e019887150553f1496d6a1eabe843982a9f 100644
--- a/examples/request_web_socket_block.py
+++ b/examples/request_web_socket_block.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 
diff --git a/examples/request_ws2p.py b/examples/request_ws2p.py
index 858f73642699e290e6fc84d42b97019bd67c7f9e..f7a3191cf8838d5916daaa88c1edffbbac092022 100644
--- a/examples/request_ws2p.py
+++ b/examples/request_ws2p.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 import time
diff --git a/examples/save_and_load_private_key_file.py b/examples/save_and_load_private_key_file.py
index 5bd4da9e317e78b1f6e632e6309e9f7d6446216c..41f06abd56548e48e61836b58919d1bbcbfa1595 100644
--- a/examples/save_and_load_private_key_file.py
+++ b/examples/save_and_load_private_key_file.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SigningKey
 import getpass
diff --git a/examples/save_and_load_private_key_file_ewif.py b/examples/save_and_load_private_key_file_ewif.py
index 9a11e39e20d5aa5e633f38e053a3200cbbf8cf22..ad1a1a9dee4414bc13779bcdc8ba07a7dd53192e 100644
--- a/examples/save_and_load_private_key_file_ewif.py
+++ b/examples/save_and_load_private_key_file_ewif.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SigningKey
 import getpass
diff --git a/examples/save_and_load_private_key_file_pubsec.py b/examples/save_and_load_private_key_file_pubsec.py
index 2f44dcf6c039470bc68131dee64a13570b7e2134..fa19a076bedbcfc1c1d822edb6767206c59ed44c 100644
--- a/examples/save_and_load_private_key_file_pubsec.py
+++ b/examples/save_and_load_private_key_file_pubsec.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SigningKey
 import getpass
diff --git a/examples/save_and_load_private_key_file_wif.py b/examples/save_and_load_private_key_file_wif.py
index 9c76cbd56601ae93b596bed2e916aa223d6205f0..033b63aa96755dd52c38b36cc96947d2fba548c2 100644
--- a/examples/save_and_load_private_key_file_wif.py
+++ b/examples/save_and_load_private_key_file_wif.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SigningKey
 import getpass
diff --git a/examples/save_binary_encrypted_message.py b/examples/save_binary_encrypted_message.py
index 50188e5be5dc7e9f9cc15f6de30836bcc393758f..3075d251c35c6cb25fa76db7c72a56dcf982d91e 100644
--- a/examples/save_binary_encrypted_message.py
+++ b/examples/save_binary_encrypted_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import PublicKey
 
diff --git a/examples/save_binary_signed_message.py b/examples/save_binary_signed_message.py
index 517c310dbde19e8cedbaba48431873a88309a059..37e5b9b8961ce5c5b12f4b95af7ad7372b062f20 100644
--- a/examples/save_binary_signed_message.py
+++ b/examples/save_binary_signed_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 
diff --git a/examples/save_cleartext_ascii_armor_message.py b/examples/save_cleartext_ascii_armor_message.py
index b402edd46f151b8a4e7112786183bbbe6e065dcf..297a8bdc626ee510d21c11e663a3c7da2f9f079b 100644
--- a/examples/save_cleartext_ascii_armor_message.py
+++ b/examples/save_cleartext_ascii_armor_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import sys
diff --git a/examples/save_encrypted_ascii_armor_message.py b/examples/save_encrypted_ascii_armor_message.py
index b99be22963131499e44c38b54d3f615f7ce465d0..4cd488ffbd3979b37252a524cb934e7305704326 100644
--- a/examples/save_encrypted_ascii_armor_message.py
+++ b/examples/save_encrypted_ascii_armor_message.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 from duniterpy import __version__
diff --git a/examples/save_revoke_document.py b/examples/save_revoke_document.py
index 4eab17a4bf2e85ea8124420f3558b38b3fb2f5f5..ec76326a4498b2601ccb667946697ca05830b9b9 100644
--- a/examples/save_revoke_document.py
+++ b/examples/save_revoke_document.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import os
diff --git a/examples/send_certification.py b/examples/send_certification.py
index 5c9919d861d0526e3eb457ab06e0153faba51ecb..e1e5adfbe1f1e71b2724fa64ad5876d48c517ace 100644
--- a/examples/send_certification.py
+++ b/examples/send_certification.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 from typing import Optional
diff --git a/examples/send_identity.py b/examples/send_identity.py
index fbbb1723a7dccf22d1d56870b2fab7d54260b800..aa59e829b7b125f73d7588832223579c3c42da19 100644
--- a/examples/send_identity.py
+++ b/examples/send_identity.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import urllib
diff --git a/examples/send_membership.py b/examples/send_membership.py
index ae1bb69590efd6e0eaedab9734e1045a571e9445..14e609380276570271242beb15cc18182eaae025 100644
--- a/examples/send_membership.py
+++ b/examples/send_membership.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import urllib
diff --git a/examples/send_transaction.py b/examples/send_transaction.py
index 50e5f2783f4590db3935d8e6492ec010e52aa3dc..88d315620ae771914efc9776e278cbda770b5cd1 100644
--- a/examples/send_transaction.py
+++ b/examples/send_transaction.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import getpass
 import urllib
diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/api/__init__.py b/tests/api/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/api/__init__.py
+++ b/tests/api/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/api/bma/__init__.py b/tests/api/bma/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/api/bma/__init__.py
+++ b/tests/api/bma/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/api/bma/test_blockchain.py b/tests/api/bma/test_blockchain.py
index 87082e8ab4487386ef1f7db409777d93a19919e4..22e2dd841806c690d7c11042b62fc4ed25876016 100644
--- a/tests/api/bma/test_blockchain.py
+++ b/tests/api/bma/test_blockchain.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/bma/test_bma.py b/tests/api/bma/test_bma.py
index 8fee431469db5f0aa6f045fdf10c175b75311a57..e56e79d3e4f7fb7847207d3c216066063004e7b2 100644
--- a/tests/api/bma/test_bma.py
+++ b/tests/api/bma/test_bma.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/bma/test_network.py b/tests/api/bma/test_network.py
index ac7f1543dabd6854c03e05073154326c7f01aa81..a83f9a8d3fa5cedebd5697c984b7b0ab92a5849f 100644
--- a/tests/api/bma/test_network.py
+++ b/tests/api/bma/test_network.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/bma/test_tx.py b/tests/api/bma/test_tx.py
index 6f8c5f13fcfdb2bc97e6281e7ece0e7e1f951f54..c3ca16fa3963c7197e8a8a71f8fc3dd29bf2bf54 100644
--- a/tests/api/bma/test_tx.py
+++ b/tests/api/bma/test_tx.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/bma/test_wot.py b/tests/api/bma/test_wot.py
index 995088ba2088480fc2cc0a28cc28d7006c97b9c2..3b522ca6243bab57a47b8af786bcedaa42fa311f 100644
--- a/tests/api/bma/test_wot.py
+++ b/tests/api/bma/test_wot.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/bma/test_ws.py b/tests/api/bma/test_ws.py
index 97a37a9914455b79bd1470e8be4a71232f896a3f..a05c45b94504bc3788c798f911810ea691ca98f4 100644
--- a/tests/api/bma/test_ws.py
+++ b/tests/api/bma/test_ws.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/test_endpoints.py b/tests/api/test_endpoints.py
index 09680167bc6aded9222b659caed850ed12bac1e4..ef37d364c4c8d1f9e41421aae583e742f7f59219 100644
--- a/tests/api/test_endpoints.py
+++ b/tests/api/test_endpoints.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/api/ws2p/test_ws2p.py b/tests/api/ws2p/test_ws2p.py
index 9a5c39b5b381686b9d714488efa6d59cc8f11f55..11a619acdd4f8c7447c1a8f964d556f4d57944c2 100644
--- a/tests/api/ws2p/test_ws2p.py
+++ b/tests/api/ws2p/test_ws2p.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import json
 import unittest
diff --git a/tests/documents/__init__.py b/tests/documents/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/documents/__init__.py
+++ b/tests/documents/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/documents/test_block.py b/tests/documents/test_block.py
index 37446e1f67a37207247d34adfa5473c476f894c6..a6db811112fd834cb19aab487b8e8f7e6eb444b4 100644
--- a/tests/documents/test_block.py
+++ b/tests/documents/test_block.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 import json
diff --git a/tests/documents/test_certification.py b/tests/documents/test_certification.py
index ddb4099fd438d5d7122963648d96eefeb0f90e31..17b7b30c18a107c82a6339f76a30890a8d0e4ff7 100644
--- a/tests/documents/test_certification.py
+++ b/tests/documents/test_certification.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 from duniterpy.documents.certification import Certification
diff --git a/tests/documents/test_crc_pubkey.py b/tests/documents/test_crc_pubkey.py
index c7f5d3a08d5b3f9d252f779047689f0eddc21987..89f50103374aed99fd3598cd76eadb195a66d48d 100644
--- a/tests/documents/test_crc_pubkey.py
+++ b/tests/documents/test_crc_pubkey.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 from duniterpy.documents.crc_pubkey import CRCPubkey
diff --git a/tests/documents/test_membership.py b/tests/documents/test_membership.py
index f39fde54f935c2531bd112e914e7fe894f62c1c1..82a0f4df230bbfd5937c8d10894a3c88748d4601 100644
--- a/tests/documents/test_membership.py
+++ b/tests/documents/test_membership.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 from duniterpy.documents.membership import Membership
diff --git a/tests/documents/test_peer.py b/tests/documents/test_peer.py
index bfe2100845cad3f2ce1ab262c2db57e40ca670eb..0c73c2ad74bde71398bcc4693e66b80866bd5e3c 100644
--- a/tests/documents/test_peer.py
+++ b/tests/documents/test_peer.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/documents/test_transaction.py b/tests/documents/test_transaction.py
index f2d82d67982510f47e60d77d5e4adae6daa532c9..36ef36e2c4f5e71e8b16551f86129fc91b34e25a 100644
--- a/tests/documents/test_transaction.py
+++ b/tests/documents/test_transaction.py
@@ -1,19 +1,18 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
 import unittest
 import pypeg2
 from duniterpy.grammars import output
diff --git a/tests/documents/test_ws2p_heads.py b/tests/documents/test_ws2p_heads.py
index 9ce8c0783abc518615ef349a891d3ca39407b009..3013adc12749af86b21327b0368226205bb52435 100644
--- a/tests/documents/test_ws2p_heads.py
+++ b/tests/documents/test_ws2p_heads.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/grammars/__init__.py b/tests/grammars/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/grammars/__init__.py
+++ b/tests/grammars/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/grammars/test_output.py b/tests/grammars/test_output.py
index 51aef5017d447f30c54805e07ebc0dc6c88da3a0..fc8e33f3689af72b5a60d577874cb725ad259faf 100644
--- a/tests/grammars/test_output.py
+++ b/tests/grammars/test_output.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 
diff --git a/tests/helpers/money.py b/tests/helpers/money.py
index 2ff81d149267918950de2ef247f05b12cb0551dd..d32d4b73c78884011351c59bdf002f6112bb6aac 100644
--- a/tests/helpers/money.py
+++ b/tests/helpers/money.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import unittest
 from operator import eq, ne, lt, ge
diff --git a/tests/helpers/ws2p.py b/tests/helpers/ws2p.py
index 1d8523ee08ac36d267bfa532f7b86acaa593cdc9..abe13492207146e91196254f0d72a2dcacb5dc10 100644
--- a/tests/helpers/ws2p.py
+++ b/tests/helpers/ws2p.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import pytest
 
diff --git a/tests/key/__init__.py b/tests/key/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..98d4059458166eab32ee9bac8ec7962b286ab23a 100644
--- a/tests/key/__init__.py
+++ b/tests/key/__init__.py
@@ -0,0 +1,14 @@
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/tests/key/test_ascii_armor.py b/tests/key/test_ascii_armor.py
index d50205c1dc75277c518e1d3f50d932a5ae0872f0..d3c6bf7d1032d141d76559fb4ad07d82ab13be54 100644
--- a/tests/key/test_ascii_armor.py
+++ b/tests/key/test_ascii_armor.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import AsciiArmor, SigningKey
 from duniterpy.key.ascii_armor import (
diff --git a/tests/key/test_encryption_key.py b/tests/key/test_encryption_key.py
index 339f94fd27a969fe7c13c79285a0732642c8ea4e..7db774c7a9220dedd840f62aedeaa8eea59cbb70 100644
--- a/tests/key/test_encryption_key.py
+++ b/tests/key/test_encryption_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SecretKey
 import unittest
diff --git a/tests/key/test_public_key.py b/tests/key/test_public_key.py
index ba1771a13ac43de615348f99a128e6bbafa13cac..89096f22c91b65e2a8eb409194e3e25866a753df 100644
--- a/tests/key/test_public_key.py
+++ b/tests/key/test_public_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import SigningKey, PublicKey
 from duniterpy.key.scrypt_params import ScryptParams
diff --git a/tests/key/test_signing_key.py b/tests/key/test_signing_key.py
index 3ddf8b2fcd8304f3f3e9cf073c978a4bf7ed9fe2..5b88f1792eb15549fdf497c8fd3b0e4b16f61857 100644
--- a/tests/key/test_signing_key.py
+++ b/tests/key/test_signing_key.py
@@ -1,19 +1,18 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 import base64
 import os
 
diff --git a/tests/key/test_verifying_key.py b/tests/key/test_verifying_key.py
index 1ae08ab16c8cf8d61c628231058295a16f020955..64cfceb53d5f695fee9d2575297ca3f4a16bdc5b 100644
--- a/tests/key/test_verifying_key.py
+++ b/tests/key/test_verifying_key.py
@@ -1,19 +1,17 @@
-"""
-Copyright  2014-2021 Vincent Texier <vit@free.fr>
-
-DuniterPy is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-DuniterPy is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-"""
+# Copyright  2014-2021 Vincent Texier <vit@free.fr>
+#
+# DuniterPy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DuniterPy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from duniterpy.key import VerifyingKey, SigningKey
 from duniterpy.key.scrypt_params import ScryptParams