Problem: MigrationElection needed to be added to the list of allowed operations

Solution: Added it

bigchaindb/__init__.py

@@ -7,6 +7,7 @@ import logging
 
 from bigchaindb.log import DEFAULT_LOGGING_CONFIG as log_config
 from bigchaindb.lib import BigchainDB  # noqa
+from bigchaindb.migrations.migration_election import MigrationElection
 from bigchaindb.version import __version__  # noqa
 from bigchaindb.core import App  # noqa
 
@@ -99,4 +100,5 @@ from bigchaindb.elections.vote import Vote  # noqa
 Transaction.register_type(Transaction.CREATE, models.Transaction)
 Transaction.register_type(Transaction.TRANSFER, models.Transaction)
 Transaction.register_type(ValidatorElection.OPERATION, ValidatorElection)
+Transaction.register_type(MigrationElection.OPERATION, MigrationElection)
 Transaction.register_type(Vote.OPERATION, Vote)

bigchaindb/commands/bigchaindb.py

@@ -13,6 +13,7 @@ import copy
 import json
 import sys
 
+from bigchaindb.migrations.migration_election import MigrationElection
 from bigchaindb.utils import load_node_key
 from bigchaindb.common.exceptions import (DatabaseDoesNotExist,
                                           ValidationError)
@@ -159,6 +160,40 @@ def run_election_new_upsert_validator(args, bigchain):
         return False
 
 
+def run_election_new_migration(args, bigchain):
+    """Initiates an election to halt block production
+
+    :param args: dict
+        args = {
+        'sk': the path to the private key of the node calling the election (str)
+        }
+    :param bigchain: an instance of BigchainDB
+    :return: election_id or `False` in case of failure
+    """
+
+    try:
+        key = load_node_key(args.sk)
+        voters = MigrationElection.recipients(bigchain)
+        election = MigrationElection.generate([key.public_key],
+                                              voters,
+                                              {}, None).sign([key.private_key])
+        election.validate(bigchain)
+    except ValidationError as e:
+        logger.error(e)
+        return False
+    except FileNotFoundError as fd_404:
+        logger.error(fd_404)
+        return False
+
+    resp = bigchain.write_transaction(election, 'broadcast_tx_commit')
+    if resp == (202, ''):
+        logger.info('[SUCCESS] Submitted proposal with id: {}'.format(election.id))
+        return election.id
+    else:
+        logger.error('Failed to commit election proposal')
+        return False
+
+
 def run_election_approve(args, bigchain):
     """Approve an election
 

bigchaindb/common/schema/transaction_v2.0.yaml

@@ -63,6 +63,7 @@ definitions:
     - CREATE
     - TRANSFER
     - VALIDATOR_ELECTION
+    - MIGRATION_ELECTION
     - VOTE
   asset:
     type: object