diff --git a/crypto/keys/ed25519.rs b/crypto/keys/ed25519.rs
index 7adbffe2bd5dd100dab9b05787ba4eb23ba14aa9..9fe98d04b8ecb5c2f280bc4510a01e45977ce8dc 100644
--- a/crypto/keys/ed25519.rs
+++ b/crypto/keys/ed25519.rs
@@ -33,7 +33,6 @@ use base58::{FromBase58, FromBase58Error, ToBase58};
 use base64;
 use base64::DecodeError;
 use crypto;
-use self::serde::ser::{Serialize, Serializer};
 
 use super::{BaseConvertionError, PrivateKey as PrivateKeyMethods, PublicKey as PublicKeyMethods};
 
diff --git a/documents/blockchain/v10/documents/certification.rs b/documents/blockchain/v10/documents/certification.rs
index 8ab4a2157770ce29960bfdd63640ef9fa0f330e1..b3e8857ccbe90c902b1e7d8bc307cb61e780aec3 100644
--- a/documents/blockchain/v10/documents/certification.rs
+++ b/documents/blockchain/v10/documents/certification.rs
@@ -17,9 +17,9 @@
 
 extern crate serde;
 
-use duniter_crypto::keys::{PublicKey, Signature, ed25519};
-use regex::Regex;
 use self::serde::ser::{Serialize, Serializer};
+use duniter_crypto::keys::{ed25519, PublicKey, Signature};
+use regex::Regex;
 
 use blockchain::v10::documents::{
     StandardTextDocumentParser, TextDocument, TextDocumentBuilder, V10Document,
diff --git a/documents/blockchain/v10/documents/identity.rs b/documents/blockchain/v10/documents/identity.rs
index 4cc4f04e8fa45a873f0c0ffff852cf414ccf9cd3..6e986565b04dc04222ff93ed31b3509b7fb4b7be 100644
--- a/documents/blockchain/v10/documents/identity.rs
+++ b/documents/blockchain/v10/documents/identity.rs
@@ -17,9 +17,9 @@
 
 extern crate serde;
 
-use duniter_crypto::keys::{PublicKey, ed25519};
-use regex::Regex;
 use self::serde::ser::{Serialize, Serializer};
+use duniter_crypto::keys::{ed25519, PublicKey};
+use regex::Regex;
 
 use blockchain::v10::documents::{
     StandardTextDocumentParser, TextDocument, TextDocumentBuilder, V10Document,
diff --git a/documents/blockchain/v10/documents/membership.rs b/documents/blockchain/v10/documents/membership.rs
index ff31ace7466ebf492952a2e267ddd9393ff5d64d..0cc53d51b5521471a4aa2719963e94a18704dbdf 100644
--- a/documents/blockchain/v10/documents/membership.rs
+++ b/documents/blockchain/v10/documents/membership.rs
@@ -17,9 +17,9 @@
 
 extern crate serde;
 
-use duniter_crypto::keys::{PublicKey, ed25519};
-use regex::Regex;
 use self::serde::ser::{Serialize, Serializer};
+use duniter_crypto::keys::{ed25519, PublicKey};
+use regex::Regex;
 
 use blockchain::v10::documents::{
     StandardTextDocumentParser, TextDocument, TextDocumentBuilder, V10Document,
diff --git a/documents/blockchain/v10/documents/revocation.rs b/documents/blockchain/v10/documents/revocation.rs
index fad5d99aadf5c7e5661450eb5d8999901e408515..b954ae13b2ead8be53710732e66daadf3ae3eb26 100644
--- a/documents/blockchain/v10/documents/revocation.rs
+++ b/documents/blockchain/v10/documents/revocation.rs
@@ -17,9 +17,9 @@
 
 extern crate serde;
 
-use duniter_crypto::keys::{PublicKey, Signature, ed25519};
-use regex::Regex;
 use self::serde::ser::{Serialize, Serializer};
+use duniter_crypto::keys::{ed25519, PublicKey, Signature};
+use regex::Regex;
 
 use blockchain::v10::documents::{
     StandardTextDocumentParser, TextDocument, TextDocumentBuilder, V10Document,
diff --git a/documents/blockchain/v10/documents/transaction.rs b/documents/blockchain/v10/documents/transaction.rs
index efcf04a7e1252862277bde9898b73b450bf415ee..49dd27ba5c92dbb7fa16b5494a737d9ec73c34b9 100644
--- a/documents/blockchain/v10/documents/transaction.rs
+++ b/documents/blockchain/v10/documents/transaction.rs
@@ -25,10 +25,8 @@ use regex::RegexBuilder;
 
 use self::serde::ser::{Serialize, Serializer};
 
-use blockchain::v10::documents::{
-    StandardTextDocumentParser, TextDocument, TextDocumentBuilder, V10Document,
-    V10DocumentParsingError,
-};
+use blockchain::v10::documents::{StandardTextDocumentParser, TextDocument, TextDocumentBuilder,
+                                 V10Document, V10DocumentParsingError};
 use blockchain::{BlockchainProtocol, Document, DocumentBuilder, IntoSpecializedDocument};
 use Blockstamp;
 
diff --git a/wotb/data/legacy.rs b/wotb/data/legacy.rs
index 202807a26632302fe6f4cb7eda4c5d2a6d5521e7..ae0efc3ff5e0a86150cadbd5ce11e70130dde15d 100644
--- a/wotb/data/legacy.rs
+++ b/wotb/data/legacy.rs
@@ -20,6 +20,8 @@ use std::collections::hash_set::Iter;
 use std::collections::HashSet;
 use std::fs::File;
 use std::io::prelude::*;
+use std::rc::Rc;
+use WotDistance;
 
 use bincode::{deserialize, serialize, Infinite};