Plug db session leak

crypto_dev_signer/keystore/postgres.py

@@ -43,7 +43,7 @@ class ReferenceKeystore(Keystore):
             self.db_session = sessionmaker(bind=self.db_engine)()
             for s in self.schema:
                 self.db_session.execute(s)
-            self.db_session.commit()
+                self.db_session.commit()
             self.symmetric_key = kwargs.get('symmetric_key')
 
 
@@ -62,7 +62,9 @@ class ReferenceKeystore(Keystore):
             try:
                 k = r.first()[0]
             except TypeError:
+                self.db_session.rollback()
                 raise UnknownAccountError(address)
+            self.db_session.commit()
             return self._decrypt(k, password)
 
 

crypto_dev_signer/runnable/signer.py

@@ -24,6 +24,7 @@ config_dir = '.'
 
 db = None
 signer = None
+session = None
 chainId = 8995
 socket_path = '/run/crypto-dev-signer/jsonrpc.ipc'