cic-internal-integration/apps/cic-eth/cic_eth/runnable/server_agent.py

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2021-02-01 18:12:51 +01:00
# standard imports
import os
import re
import logging
import argparse
import json
# third-party imports
import web3
import confini
import celery
from json.decoder import JSONDecodeError
from cic_registry.chain import ChainSpec
# local imports
from cic_eth.db import dsn_from_config
from cic_eth.db.models.base import SessionBase
from cic_eth.eth.util import unpack_signed_raw_tx
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
rootdir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
dbdir = os.path.join(rootdir, 'cic_eth', 'db')
migrationsdir = os.path.join(dbdir, 'migrations')
config_dir = os.path.join('/usr/local/etc/cic-eth')
argparser = argparse.ArgumentParser()
argparser.add_argument('-c', type=str, default=config_dir, help='config file')
argparser.add_argument('-i', '--chain-spec', dest='i', type=str, help='chain spec')
argparser.add_argument('--env-prefix', default=os.environ.get('CONFINI_ENV_PREFIX'), dest='env_prefix', type=str, help='environment prefix for variables to overwrite configuration')
argparser.add_argument('-q', type=str, default='cic-eth', help='queue name for worker tasks')
argparser.add_argument('-v', action='store_true', help='be verbose')
argparser.add_argument('-vv', action='store_true', help='be more verbose')
args = argparser.parse_args()
if args.vv:
logging.getLogger().setLevel(logging.DEBUG)
elif args.v:
logging.getLogger().setLevel(logging.INFO)
config = confini.Config(args.c, args.env_prefix)
config.process()
args_override = {
'CIC_CHAIN_SPEC': getattr(args, 'i'),
}
config.censor('PASSWORD', 'DATABASE')
config.censor('PASSWORD', 'SSL')
logg.debug('config:\n{}'.format(config))
dsn = dsn_from_config(config)
SessionBase.connect(dsn)
celery_app = celery.Celery(backend=config.get('CELERY_RESULT_URL'), broker=config.get('CELERY_BROKER_URL'))
queue = args.q
re_transfer_approval_request = r'^/transferrequest/?'
chain_spec = ChainSpec.from_chain_str(config.get('CIC_CHAIN_SPEC'))
def process_transfer_approval_request(session, env):
r = re.match(re_transfer_approval_request, env.get('PATH_INFO'))
if not r:
return None
if env.get('CONTENT_TYPE') != 'application/json':
raise AttributeError('content type')
if env.get('REQUEST_METHOD') != 'POST':
raise AttributeError('method')
post_data = json.load(env.get('wsgi.input'))
token_address = web3.Web3.toChecksumAddress(post_data['token_address'])
holder_address = web3.Web3.toChecksumAddress(post_data['holder_address'])
beneficiary_address = web3.Web3.toChecksumAddress(post_data['beneficiary_address'])
value = int(post_data['value'])
logg.debug('transfer approval request token {} to {} from {} value {}'.format(
token_address,
beneficiary_address,
holder_address,
value,
)
)
s = celery.signature(
'cic_eth.eth.request.transfer_approval_request',
[
[
{
'address': token_address,
},
],
holder_address,
beneficiary_address,
value,
config.get('CIC_CHAIN_SPEC'),
],
queue=queue,
)
t = s.apply_async()
r = t.get()
tx_raw_bytes = bytes.fromhex(r[0][2:])
tx = unpack_signed_raw_tx(tx_raw_bytes, chain_spec.chain_id())
for r in t.collect():
logg.debug('result {}'.format(r))
if not t.successful():
raise RuntimeError(tx['hash'])
return ('text/plain', tx['hash'].encode('utf-8'),)
# uwsgi application
def application(env, start_response):
for k in env.keys():
logg.debug('env {} {}'.format(k, env[k]))
headers = []
content = b''
err = None
session = SessionBase.create_session()
for handler in [
process_transfer_approval_request,
]:
try:
r = handler(session, env)
except AttributeError as e:
logg.error('handler fail attribute {}'.format(e))
err = '400 Impertinent request'
break
except JSONDecodeError as e:
logg.error('handler fail json {}'.format(e))
err = '400 Invalid data format'
break
except KeyError as e:
logg.error('handler fail key {}'.format(e))
err = '400 Invalid JSON'
break
except ValueError as e:
logg.error('handler fail value {}'.format(e))
err = '400 Invalid data'
break
except RuntimeError as e:
logg.error('task fail value {}'.format(e))
err = '500 Task failed, sorry I cannot tell you more'
break
if r != None:
(mime_type, content) = r
break
session.close()
if err != None:
headers.append(('Content-Type', 'text/plain, charset=UTF-8',))
start_response(err, headers)
session.close()
return [content]
headers.append(('Content-Length', str(len(content))),)
headers.append(('Access-Control-Allow-Origin', '*',));
if len(content) == 0:
headers.append(('Content-Type', 'text/plain, charset=UTF-8',))
start_response('404 Looked everywhere, sorry', headers)
else:
headers.append(('Content-Type', mime_type,))
start_response('200 OK', headers)
return [content]