Genesis port script v0.34.0

.gitignore

@@ -7,6 +7,7 @@
 *.swn
 .vscode
 .idea
+*.pyc
 
 # Build
 vendor

.pending/improvements/gaia/4018-create-genesis-

@@ -0,0 +1 @@
+#4018 create genesis port script for release v.0.34.0

contrib/export/lib.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+import argparse
+import json
+import sys
+
+
+def init_default_argument_parser(prog_desc, default_chain_id, default_start_time):
+    parser = argparse.ArgumentParser(description=prog_desc)
+    parser.add_argument(
+        'exported_genesis',
+        help='exported genesis.json file',
+        type=argparse.FileType('r'), default=sys.stdin,
+    )
+    parser.add_argument('--chain-id', type=str, default=default_chain_id)
+    parser.add_argument('--start-time', type=str, default=default_start_time)
+    return parser
+
+
+def main(argument_parser, process_genesis_func):
+    args = argument_parser.parse_args()
+    if args.chain_id.strip() == '':
+        sys.exit('chain-id required')
+
+    genesis = json.loads(args.exported_genesis.read())
+
+    print(json.dumps(process_genesis_func(
+        genesis=genesis, parsed_args=args,), indent=True))

contrib/export/v0.33.x-to-v0.34.0.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+import lib
+
+
+def process_raw_genesis(genesis, parsed_args):
+    # update genesis with breaking changes
+    genesis['consensus_params']['block'] = genesis['consensus_params']['block_size']
+    del genesis['consensus_params']['block_size']
+
+    genesis['app_state']['crisis'] = {
+        'constant_fee': {
+            'amount': '1333000000',  # ~$5,000 worth of uatoms
+            'denom': 'uatom',
+        },
+    }
+
+    # proposal #1 updates
+    genesis['app_state']['mint']['params']['blocks_per_year'] = '4855015'
+
+    # proposal #2 updates
+    genesis['consensus_params']['block']['max_gas'] = '2000000'
+    genesis['consensus_params']['block']['max_bytes'] = '200000'
+
+    # enable transfers
+    genesis['app_state']['bank']['send_enabled'] = True
+    genesis['app_state']['distr']['withdraw_add_enabled'] = True
+
+    # Set new chain ID and genesis start time
+    genesis['chain_id'] = parsed_args.chain_id.strip()
+    genesis['genesis_time'] = parsed_args.start_time
+
+    return genesis
+
+
+if __name__ == '__main__':
+    parser = lib.init_default_argument_parser(
+        prog_desc='Convert genesis.json from v0.33.x to v0.34.0',
+        default_chain_id='cosmoshub-n',
+        default_start_time='2019-02-11T12:00:00Z',
+    )
+    lib.main(parser, process_raw_genesis)