Add forgotten file

lib/ucoinpy/documents/document.py

+import base58
+import base64
+import re
+import logging
+import hashlib
+from ..key import Base58Encoder
+
+
+class Document:
+    re_version = re.compile("Version: ([0-9]+)\n")
+    re_currency = re.compile("Currency: ([^\n]+)\n")
+    re_signature = re.compile("([A-Za-z0-9+/]+(?:=|==)?)\n")
+
+    def __init__(self, version, currency, signatures):
+        self.version = version
+        self.currency = currency
+        if signatures:
+            self.signatures = [s for s in signatures if s is not None]
+        else:
+            self.signatures = []
+
+    def sign(self, keys):
+        """
+        Sign the current document.
+        Warning : current signatures will be replaced with the new ones.
+        """
+        self.signatures = []
+        for key in keys:
+            signing = base64.b64encode(key.signature(bytes(self.raw(), 'ascii')))
+            logging.debug("Signature : \n{0}".format(signing.decode("ascii")))
+            self.signatures.append(signing.decode("ascii"))
+
+    def signed_raw(self):
+        """
+        If keys are None, returns the raw + current signatures
+        If keys are present, returns the raw signed by these keys
+        """
+        raw = self.raw()
+        signed = "\n".join(self.signatures)
+        signed_raw = raw + signed + "\n"
+        return signed_raw
+
+    @property
+    def sha_hash(self):
+        return hashlib.sha1(self.signed_raw().encode("ascii")).hexdigest().upper()