20 Commits

Author SHA1 Message Date
lash
adcdcd704e Add settings for token module 2022-07-02 05:57:42 +00:00
lash
ca059c5b30 Bump chaind dep 2022-05-14 16:23:33 +00:00
lash
30172798c0 Bump minor version 2022-05-14 16:20:09 +00:00
lash
df02af8b6d Load config for syncer executable 2022-05-14 16:15:02 +00:00
lash
0a44ceb364 Add session cli arg handling to send, queuer 2022-05-14 12:41:28 +00:00
lash
f49e4149fd Rehabilitate send 2022-05-14 12:25:02 +00:00
lash
7c0df3b967 Rehabilitate queuer and syncer cli 2022-05-13 13:47:58 +00:00
lash
acbbebd8da WIP implement chaind-eth on chainlib 0.3.0 structure 2022-05-13 10:32:28 +00:00
lash
96f58c5f41 Bump version 2022-05-09 20:21:44 +00:00
lash
0707291f8f Upgrade chainlib to 0.2.0 2022-05-09 19:54:17 +00:00
lash
ed7f0a3f71 Upgrade chaind to handle exception in filesystem shep list 2022-05-05 15:45:59 +00:00
lash
2fc3d4da0c Single adapter instantiation 2022-05-05 15:08:51 +00:00
lash
5fc27671da Upgrade chaind 2022-05-05 08:10:38 +00:00
lash
8f86e9c970 Implement unsafe address for send 2022-05-04 07:26:17 +00:00
lash
abc619d7b2 Factor out outgoing processor 2022-05-04 05:41:00 +00:00
lash
42aa809500 Defer processing backend error handling to parent 2022-05-02 09:59:50 +00:00
lash
e31367853c Correct erc20 extension req 2022-05-01 06:27:26 +00:00
lash
9522729fa0 Catch backend race 2022-04-30 18:44:52 +00:00
lash
097a6f4b53 Advance nonce on gas token txs only 2022-04-29 06:30:12 +00:00
lash
8d0a1f589b Update chain interface, add chainqueue settings to cli 2022-04-28 12:49:50 +00:00
16 changed files with 276 additions and 134 deletions

1
.gitignore vendored
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@@ -6,3 +6,4 @@ build/
*.egg-info
*.sqlite
.coverage
.chaind

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@@ -21,7 +21,6 @@ class Normalizer(TxHexNormalizer, NoopNormalizer):
hexathon.to_int(v)
eth_normalizer = Normalizer()

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@@ -2,6 +2,7 @@
from chainlib.interface import ChainInterface
from chainlib.eth.block import (
block_by_number,
block_latest,
Block,
)
from chainlib.eth.tx import (
@@ -16,3 +17,4 @@ class EthChainInterface(ChainInterface):
self._block_from_src = Block.from_src
self._tx_receipt = receipt
self._src_normalize = Tx.src_normalize
self._block_latest = block_latest

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@@ -4,3 +4,6 @@ runtime_dir =
id =
data_dir =
dispatch_delay = 0.01
[tx]
digest_size = 32

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@@ -5,7 +5,23 @@ import signal
# external imports
import chainlib.eth.cli
import chaind.cli
from chainlib.eth.cli.arg import (
Arg,
ArgFlag,
process_args,
)
from chainlib.eth.cli.config import (
Config,
process_config,
)
from chainqueue.cli.arg import (
apply_arg as apply_arg_queue,
apply_flag as apply_flag_queue,
)
from chaind.cli.arg import (
apply_arg,
apply_flag,
)
from chaind.session import SessionController
from chaind.setup import Environment
from chaind.error import (
@@ -27,11 +43,22 @@ from chainqueue.cache import CacheTokenTx
from chainlib.encode import TxHexNormalizer
from chainlib.chain import ChainSpec
from chaind.adapters.fs import ChaindFsAdapter
from chaind.dispatch import DispatchProcessor
from chainqueue.data import config_dir as chainqueue_config_dir
from chaind.data import config_dir as chaind_config_dir
from chainlib.eth.cli.log import process_log
from chaind.cli.config import process_config as process_config_local
# local imports
from chaind.eth.dispatch import EthDispatcher
from chaind.eth.cache import EthCacheTx
from chaind.eth.settings import ChaindEthSettings
from chaind.eth.settings import ChaindSettings
from chaind.eth.dispatch import EthDispatcher
from chaind.eth.settings import process_settings
from chaind.settings import (
process_queue,
process_socket,
process_dispatch,
)
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
@@ -41,60 +68,63 @@ config_dir = os.path.join(script_dir, '..', 'data', 'config')
env = Environment(domain='eth', env=os.environ)
arg_flags = chainlib.eth.cli.argflag_std_read
argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
arg_flags = ArgFlag()
arg_flags = apply_flag_queue(arg_flags)
arg_flags = apply_flag(arg_flags)
local_arg_flags = chaind.cli.argflag_local_base | chaind.cli.ChaindFlag.DISPATCH | chaind.cli.ChaindFlag.SOCKET
chaind.cli.process_flags(argparser, local_arg_flags)
arg = Arg(arg_flags)
arg = apply_arg_queue(arg)
arg = apply_arg(arg)
flags = arg_flags.STD_READ | arg_flags.QUEUE | arg_flags.STATE | arg_flags.SESSION
argparser = chainlib.eth.cli.ArgumentParser()
argparser = process_args(argparser, arg, flags)
args = argparser.parse_args()
base_config_dir = [chaind.cli.config_dir]
config = chainlib.eth.cli.Config.from_args(args, arg_flags, base_config_dir=base_config_dir)
config = chaind.cli.process_config(config, args, local_arg_flags)
logg = process_log(args, logg)
config = Config()
config.add_schema_dir(chainqueue_config_dir)
config.add_schema_dir(chaind_config_dir)
config = process_config(config, arg, args, flags)
config = process_config_local(config, arg, args, flags)
config.add('eth', 'CHAIND_ENGINE', False)
config.add('queue', 'CHAIND_COMPONENT', False)
config.add('sync', 'CHAIND_COMPONENT', False)
logg.debug('config loaded:\n{}'.format(config))
settings = ChaindEthSettings(include_queue=True)
settings.process(config)
logg.debug('settings:\n{}'.format(settings))
def process_outgoing(chain_spec, adapter, rpc, limit=100):
upcoming = adapter.upcoming()
logg.info('process {} {} {}'.format(chain_spec, adapter, rpc))
logg.info('upcoming {}'.format(upcoming))
i = 0
for tx_hash in upcoming:
if adapter.dispatch(tx_hash):
i += 1
return i
chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
rpc = chainlib.eth.cli.Rpc()
conn = rpc.connect_by_config(config)
settings = ChaindSettings(include_sync=True)
settings = process_settings(settings, config)
settings = process_queue(settings, config)
settings = process_socket(settings, config)
settings = process_dispatch(settings, config)
logg.debug('settings loaded:\n{}'.format(settings))
tx_normalizer = TxHexNormalizer().tx_hash
token_cache_store = CacheTokenTx(chain_spec, normalizer=tx_normalizer)
dispatcher = EthDispatcher(conn)
queue_adapter = ChaindFsAdapter(
settings.get('CHAIN_SPEC'),
settings.get('SESSION_DATA_DIR'),
EthCacheTx,
dispatcher,
)
token_cache_store = CacheTokenTx(settings.get('CHAIN_SPEC'), normalizer=tx_normalizer)
dispatcher = EthDispatcher(settings.get('CONN'))
processor = DispatchProcessor(settings.get('CHAIN_SPEC'), settings.dir_for('queue'), dispatcher)
ctrl = SessionController(settings, processor.process)
ctrl = SessionController(settings, queue_adapter, process_outgoing)
signal.signal(signal.SIGINT, ctrl.shutdown)
signal.signal(signal.SIGTERM, ctrl.shutdown)
logg.info('session id is ' + settings.get('SESSION_ID'))
logg.info('session socket path is ' + settings.get('SESSION_SOCKET_PATH'))
def main():
global dispatcher, settings
queue_adapter = ChaindFsAdapter(
settings.get('CHAIN_SPEC'),
settings.dir_for('queue'),
EthCacheTx,
dispatcher,
store_sync=False,
)
while True:
v = None
client_socket = None
@@ -110,7 +140,8 @@ def main():
pass
if v == None:
ctrl.process(conn)
ctrl.process(settings.get('CONN'))
#queue_adapter = create_adapter(settings, dispatcher)
continue
result_data = None

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@@ -10,14 +10,40 @@ import socket
# external imports
import chainlib.eth.cli
import chaind.cli
from chainlib.eth.cli.arg import (
Arg,
ArgFlag,
process_args,
)
from chainlib.eth.cli.config import (
Config,
process_config,
)
from chaind.setup import Environment
from chainlib.eth.gas import price
from chainlib.chain import ChainSpec
from hexathon import strip_0x
from chainqueue.cli.arg import (
apply_arg as apply_arg_queue,
apply_flag as apply_flag_queue,
)
from chainqueue.data import config_dir as chainqueue_config_dir
from chaind.data import config_dir as chaind_config_dir
from chaind.cli.arg import (
apply_arg,
apply_flag,
)
from chainlib.eth.cli.log import process_log
from chaind.settings import process_queue
from chaind.settings import ChaindSettings
from chaind.error import TxSourceError
from chainlib.error import (
InitializationError,
SignerMissingException,
)
from chaind.cli.config import process_config as process_config_local
# local imports
from chaind.error import TxSourceError
from chaind.eth.token.process import Processor
from chaind.eth.token.gas import GasTokenResolver
from chaind.eth.cli.csv import CSVProcessor
@@ -25,42 +51,56 @@ from chaind.eth.cli.output import (
Outputter,
OpMode,
)
from chaind.eth.settings import ChaindEthSettings
from chaind.eth.settings import process_settings
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
arg_flags = chainlib.eth.cli.argflag_std_write
argparser = chainlib.eth.cli.ArgumentParser(arg_flags, arg_long={'-s': '--send-rpc'})
argparser.add_positional('source', required=False, type=str, help='Transaction source file')
local_arg_flags = chaind.cli.argflag_local_socket_client | chaind.cli.ChaindFlag.TOKEN
chaind.cli.process_flags(argparser, local_arg_flags)
def process_settings_local(settings, config):
# if settings.get('SIGNER') == None:
# raise SignerMissingException('signer missing')
return settings
args = argparser.parse_args()
env = Environment(domain='eth', env=os.environ)
base_config_dir = [chaind.cli.config_dir]
config = chainlib.eth.cli.Config.from_args(args, arg_flags, base_config_dir=base_config_dir)
config = chaind.cli.process_config(config, args, local_arg_flags)
arg_flags = ArgFlag()
arg_flags = apply_flag_queue(arg_flags)
arg_flags = apply_flag(arg_flags)
arg = Arg(arg_flags)
arg = apply_arg_queue(arg)
arg = apply_arg(arg)
arg.set_long('s', 'send-rpc')
flags = arg_flags.STD_WRITE | arg_flags.TOKEN | arg_flags.SOCKET_CLIENT | arg_flags.STATE | arg_flags.WALLET | arg_flags.SESSION
argparser = chainlib.eth.cli.ArgumentParser()
argparser = process_args(argparser, arg, flags)
argparser.add_argument('source', help='Transaction source file')
args = argparser.parse_args()
logg = process_log(args, logg)
config = Config()
config.add_schema_dir(chainqueue_config_dir)
config.add_schema_dir(chaind_config_dir)
config = process_config(config, arg, args, flags)
config = process_config_local(config, arg, args, flags)
config.add(args.source, '_SOURCE', False)
config.add('eth', 'CHAIND_ENGINE', False)
config.add('queue', 'CHAIND_COMPONENT', False)
config.add('eth', 'CHAIND_ENGINE', False)
logg.debug('config loaded:\n{}'.format(config))
wallet = chainlib.eth.cli.Wallet()
wallet.from_config(config)
settings = ChaindEthSettings(include_queue=True)
settings.process(config)
logg.debug('settings:\n{}'.format(settings))
rpc = chainlib.eth.cli.Rpc(wallet=wallet)
conn = rpc.connect_by_config(config)
chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
try:
settings = ChaindSettings(include_sync=True)
settings = process_settings(settings, config)
settings = process_queue(settings, config)
settings = process_settings_local(settings, config)
except InitializationError as e:
sys.stderr.write('Initialization error: ' + str(e) + '\n')
sys.exit(1)
logg.debug('settings loaded:\n{}'.format(settings))
mode = OpMode.STDOUT
@@ -96,7 +136,14 @@ class SocketSender:
def send(self, tx):
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect(self.path)
err = None
try:
s.connect(self.path)
except FileNotFoundError as e:
err = e
if err != None:
s.close()
raise err
s.sendall(tx.encode('utf-8'))
r = s.recv(68)
s.close()
@@ -104,6 +151,7 @@ class SocketSender:
def main():
conn = settings.get('CONN')
token_resolver = None
if settings.get('TOKEN_MODULE') != None:
import importlib
@@ -112,9 +160,15 @@ def main():
else:
from chaind.eth.token.gas import GasTokenResolver
m = GasTokenResolver
token_resolver = m(chain_spec, rpc.get_sender_address(), rpc.get_signer(), rpc.get_gas_oracle(), rpc.get_nonce_oracle())
token_resolver = m(
settings.get('CHAIN_SPEC'),
settings.get('SENDER_ADDRESS'),
settings.get('SIGNER'),
settings.get('GAS_ORACLE'),
settings.get('NONCE_ORACLE'),
)
processor = Processor(token_resolver, config.get('_SOURCE'))
processor = Processor(token_resolver, config.get('_SOURCE'), use_checksum=not config.get('_UNSAFE'))
processor.add_processor(CSVProcessor())
sends = None
@@ -139,7 +193,12 @@ def main():
break
tx_hex = tx_bytes.hex()
if sender != None:
r = sender.send(tx_hex)
r = None
try:
r = sender.send(tx_hex)
except FileNotFoundError as e:
sys.stderr.write('send to socket {} failed: {}\n'.format(sender.path, e))
sys.exit(1)
logg.info('sent {} result {}'.format(tx_hex, r))
print(out.do(tx_hex))

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@@ -3,26 +3,46 @@ import os
import logging
# external imports
import chainlib.cli
import chainsyncer.cli
import chaind.cli
import chainlib.eth.cli
from chaind.setup import Environment
from chaind.filter import StateFilter
from chaind.adapters.fs import ChaindFsAdapter
from chainlib.eth.block import block_latest
from hexathon import strip_0x
from chainsyncer.store.fs import SyncFsStore
from chainsyncer.driver.chain_interface import ChainInterfaceDriver
from chainsyncer.error import SyncDone
# local imports
from chaind.eth.settings import ChaindEthSettings
from chainlib.eth.cli.arg import (
Arg,
ArgFlag,
process_args,
)
from chainlib.eth.cli.config import (
Config,
process_config,
)
from chainsyncer.cli.arg import (
apply_arg as apply_arg_sync,
apply_flag as apply_flag_sync,
)
from chainsyncer.data import config_dir as chainsyncer_config_dir
from chaind.data import config_dir as chaind_config_dir
from chaind.cli.arg import (
apply_arg,
apply_flag,
)
from chainlib.eth.cli.log import process_log
from chaind.settings import ChaindSettings
from chaind.cli.config import process_config as process_config_local
from chainsyncer.cli.config import process_config as process_config_syncer
# local imports
from chaind.eth.cache import EthCacheTx
from chaind.eth.settings import (
process_settings,
process_sync,
)
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
script_dir = os.path.dirname(os.path.realpath(__file__))
@@ -30,49 +50,50 @@ config_dir = os.path.join(script_dir, '..', 'data', 'config')
env = Environment(domain='eth', env=os.environ)
arg_flags = chainlib.cli.argflag_std_base | chainlib.cli.Flag.CHAIN_SPEC
argparser = chainlib.cli.ArgumentParser(arg_flags)
arg_flags = ArgFlag()
arg_flags = apply_flag_sync(arg_flags)
arg_flags = apply_flag(arg_flags)
local_arg_flags = chaind.cli.argflag_local_base
chaind.cli.process_flags(argparser, local_arg_flags)
arg = Arg(arg_flags)
arg = apply_arg_sync(arg)
arg = apply_arg(arg)
sync_flags = chainsyncer.cli.SyncFlag.RANGE | chainsyncer.cli.SyncFlag.HEAD
chainsyncer.cli.process_flags(argparser, sync_flags)
flags = arg_flags.STD_BASE | arg_flags.CHAIN_SPEC | arg_flags.PROVIDER | arg_flags.SEQ | arg_flags.STATE
flags = arg_flags.more(flags, arg_flags.SYNC_RANGE_EXT)
flags = arg_flags.more(flags, arg_flags.CHAIND_BASE)
argparser = chainlib.eth.cli.ArgumentParser()
argparser = process_args(argparser, arg, flags)
args = argparser.parse_args()
base_config_dir = [
chainsyncer.cli.config_dir,
chaind.cli.config_dir,
]
config = chainlib.cli.Config.from_args(args, arg_flags, base_config_dir=base_config_dir)
config = chainsyncer.cli.process_config(config, args, sync_flags)
config = chaind.cli.process_config(config, args, local_arg_flags)
logg = process_log(args, logg)
config = Config()
config.add_schema_dir(chainsyncer_config_dir)
config.add_schema_dir(chaind_config_dir)
config = process_config(config, arg, args, flags)
config = process_config_local(config, arg, args, flags)
config = process_config_syncer(config, arg, args, flags)
config.add('eth', 'CHAIND_ENGINE', False)
config.add('sync', 'CHAIND_COMPONENT', False)
logg.debug('config loaded:\n{}'.format(config))
settings = ChaindEthSettings(include_sync=True)
settings.process(config)
settings = ChaindSettings(include_sync=True)
settings = process_settings(settings, config)
settings = process_sync(settings, config)
logg.debug('settings loaded:\n{}'.format(settings))
logg.debug('settings:\n{}'.format(settings))
def main():
queue_adapter = ChaindFsAdapter(
settings.get('CHAIN_SPEC'),
settings.dir_for('queue'),
EthCacheTx,
None,
)
fltr = StateFilter(queue_adapter)
sync_store = SyncFsStore(settings.get('SESSION_DATA_DIR'), session_id=settings.get('SESSION_ID'))
fltr = StateFilter(settings.get('CHAIN_SPEC'), settings.dir_for('queue'), EthCacheTx)
sync_store = SyncFsStore(settings.get('SESSION_DATA_PATH'), session_id=settings.get('SESSION_ID'))
sync_store.register(fltr)
logg.debug('session block offset {}'.format(settings.get('SYNCER_OFFSET')))
drv = ChainInterfaceDriver(sync_store, settings.get('SYNCER_INTERFACE'), offset=settings.get('SYNCER_OFFSET'), target=settings.get('SYNCER_LIMIT'))
try:
drv.run(settings.get('RPC'))
drv.run(settings.get('CONN'))
except SyncDone as e:
logg.info('sync done: {}'.format(e))

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@@ -1,18 +1,32 @@
# external imports
from chainlib.eth.connection import EthHTTPConnection
from chaind.settings import ChaindSettings
from chainlib.eth.settings import process_settings as base_process_settings
from chaind.eth.chain import EthChainInterface
from chaind.settings import *
from chainsyncer.settings import process_sync_range
class ChaindEthSettings(ChaindSettings):
def process_sync_interface(self, config):
self.o['SYNCER_INTERFACE'] = EthChainInterface()
def process_common(settings, config):
rpc_provider = config.get('RPC_PROVIDER')
if rpc_provider == None:
rpc_provider = 'http://localhost:8545'
conn = EthHTTPConnection(url=rpc_provider, chain_spec=settings.get('CHAIN_SPEC'))
settings.set('RPC', conn)
return settings
def process_common(self, config):
super(ChaindEthSettings, self).process_common(config)
rpc_provider = config.get('RPC_PROVIDER')
if rpc_provider == None:
rpc_provider = 'http://localhost:8545'
self.o['RPC'] = EthHTTPConnection(url=rpc_provider, chain_spec=self.o['CHAIN_SPEC'])
def process_sync(settings, config):
settings.set('SYNCER_INTERFACE', EthChainInterface())
settings = process_sync_range(settings, config)
return settings
def process_settings(settings, config):
settings = base_process_settings(settings, config)
settings = process_common(settings, config)
settings = process_backend(settings, config)
settings = process_session(settings, config)
settings = process_socket(settings, config)
settings = process_token(settings, config)
return settings

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@@ -9,7 +9,7 @@ logg = logging.getLogger(__name__)
class BaseTokenResolver:
def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle):
def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle, advance_nonce=False):
self.chain_spec = chain_spec
self.chain_id = chain_spec.chain_id()
self.signer = signer
@@ -19,6 +19,10 @@ class BaseTokenResolver:
self.factory = None
self.gas_limit_start = None
self.gas_price_start = None
if advance_nonce:
self.nonce_getter = self.nonce_oracle.next_nonce
else:
self.nonce_getter = self.nonce_oracle.get_nonce
def reset(self):
@@ -28,7 +32,7 @@ class BaseTokenResolver:
def get_values(self, gas_value, value, executable_address=None):
nonce = self.nonce_oracle.get_nonce()
nonce = self.nonce_getter()
if executable_address == None:
return (value, 0, nonce)

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@@ -9,7 +9,7 @@ from chaind.eth.token import BaseTokenResolver
class GasTokenResolver(BaseTokenResolver):
def __init__(self, chain_spec, sender, signer, gas_oracle, nonce_oracle):
super(GasTokenResolver, self).__init__(chain_spec, sender, signer, gas_oracle, nonce_oracle)
super(GasTokenResolver, self).__init__(chain_spec, sender, signer, gas_oracle, nonce_oracle, advance_nonce=True)
self.factory = Gas(self.chain_spec, signer=self.signer, gas_oracle=self.gas_oracle, nonce_oracle=self.nonce_oracle)

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@@ -3,7 +3,10 @@ import logging
# external imports
from chaind.error import TxSourceError
from chainlib.eth.address import is_checksum_address
from chainlib.eth.address import (
is_checksum_address,
to_checksum_address,
)
from chainlib.eth.tx import unpack
from chainlib.eth.gas import Gas
from hexathon import (
@@ -17,10 +20,11 @@ logg = logging.getLogger(__name__)
class Processor:
def __init__(self, resolver, source):
def __init__(self, resolver, source, use_checksum=True):
self.resolver = resolver
self.source = source
self.processor = []
self.safe = use_checksum
self.conn = None
@@ -50,9 +54,14 @@ class Processor:
txs = []
for i, r in enumerate(self.content):
logg.debug('processing {}'.format(r))
if not is_checksum_address(r[0]):
raise ValueError('invalid checksum address {} in record {}'.format(r[0], i))
self.content[i][0] = add_0x(r[0])
address = r[0]
if self.safe:
if not is_checksum_address(address):
raise ValueError('invalid checksum address {} in record {}'.format(address, i))
else:
address = to_checksum_address(address)
self.content[i][0] = add_0x(address)
try:
self.content[i][1] = int(r[1])
except ValueError:

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@@ -1 +1 @@
eth-erc20~=0.3.0
eth-erc20~=0.3.2

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@@ -1,6 +1,5 @@
chaind~=0.1.1
hexathon~=0.1.5
chainlib-eth~=0.1.0
chaind~=0.3.0
hexathon~=0.1.7
chainlib-eth~=0.3.0
pyxdg~=0.27
shep~=0.2.3
funga-eth~=0.6.0
funga-eth~=0.6.1

View File

@@ -1,6 +1,6 @@
[metadata]
name = chaind-eth
version = 0.1.3
version = 0.3.1
description = Queue server for ethereum
author = Louis Holbrook
author_email = dev@holbrook.no

View File

@@ -27,7 +27,7 @@ while True:
l = f.readline()
if l == '':
break
test_requirements.append(l.rstrip())
erc20_requirements.append(l.rstrip())
f.close()

View File

@@ -11,7 +11,7 @@ from chainlib.chain import ChainSpec
from chainqueue.cache import CacheTokenTx
from chainlib.error import RPCException
from chainlib.status import Status as TxStatus
from chaind.unittest.common import TestChaindFsBase
from chaind.unittest.fs import TestChaindFsBase
from chaind.driver import QueueDriver
from chaind.filter import StateFilter
from chainlib.eth.gas import Gas