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cic-eth: Introduce transfer authorization contract

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This commit is contained in:
Louis Holbrook
2021-03-04 15:06:14 +00:00
committed by Philip Wafula
parent 1e9bf6b4d3
commit 8240e58c0a
29 changed files with 312 additions and 366 deletions
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194
apps/cic-eth/cic_eth/eth/request.py
View File

@@ -1,194 +0,0 @@
# standard imports
import logging
# third-party imports
import web3
import celery
from erc20_approval_escrow import TransferApproval
from cic_registry import CICRegistry
from cic_registry.chain import ChainSpec
# local imports
from cic_eth.db.models.tx import TxCache
from cic_eth.db.models.base import SessionBase
from cic_eth.eth import RpcClient
from cic_eth.eth.factory import TxFactory
from cic_eth.eth.task import sign_and_register_tx
from cic_eth.eth.util import unpack_signed_raw_tx
from cic_eth.eth.task import create_check_gas_and_send_task
from cic_eth.error import TokenCountError
celery_app = celery.current_app
logg = logging.getLogger()
contract_function_signatures = {
'request': 'b0addede',
}
class TransferRequestTxFactory(TxFactory):
"""Factory for creating Transfer request transactions using the TransferApproval contract backend
"""
def request(
self,
token_address,
beneficiary_address,
amount,
chain_spec,
):
"""Create a new TransferApproval.request transaction
:param token_address: Token to create transfer request for
:type token_address: str, 0x-hex
:param beneficiary_address: Beneficiary of token transfer
:type beneficiary_address: str, 0x-hex
:param amount: Amount of tokens to transfer
:type amount: number
:param chain_spec: Chain spec
:type chain_spec: cic_registry.chain.ChainSpec
:returns: Transaction in standard Ethereum format
:rtype: dict
"""
transfer_approval = CICRegistry.get_contract(chain_spec, 'TransferApproval', 'TransferAuthorization')
fn = transfer_approval.function('createRequest')
tx_approval_buildable = fn(beneficiary_address, token_address, amount)
transfer_approval_gas = transfer_approval.gas('createRequest')
tx_approval = tx_approval_buildable.buildTransaction({
'from': self.address,
'gas': transfer_approval_gas,
'gasPrice': self.gas_price,
'chainId': chain_spec.chain_id(),
'nonce': self.next_nonce(),
})
return tx_approval
def unpack_transfer_approval_request(data):
"""Verifies that a transaction is an "TransferApproval.request" transaction, and extracts call parameters from it.
:param data: Raw input data from Ethereum transaction.
:type data: str, 0x-hex
:raises ValueError: Function signature does not match AccountRegister.add
:returns: Parsed parameters
:rtype: dict
"""
f = data[2:10]
if f != contract_function_signatures['request']:
raise ValueError('Invalid transfer request data ({})'.format(f))
d = data[10:]
return {
'to': web3.Web3.toChecksumAddress('0x' + d[64-40:64]),
'token': web3.Web3.toChecksumAddress('0x' + d[128-40:128]),
'amount': int(d[128:], 16)
}
@celery_app.task(bind=True)
def transfer_approval_request(self, tokens, holder_address, receiver_address, value, chain_str):
"""Creates a new transfer approval
:param tokens: Token to generate transfer request for
:type tokens: list with single token spec as dict
:param holder_address: Address to generate transfer on behalf of
:type holder_address: str, 0x-hex
:param receiver_address: Address to transfser tokens to
:type receiver_address: str, 0x-hex
:param value: Amount of tokens to transfer
:type value: number
:param chain_spec: Chain spec string representation
:type chain_spec: str
:raises cic_eth.error.TokenCountError: More than one token in tokens argument
:returns: Raw signed transaction
:rtype: list with transaction as only element
"""
if len(tokens) != 1:
raise TokenCountError
chain_spec = ChainSpec.from_chain_str(chain_str)
queue = self.request.delivery_info['routing_key']
t = tokens[0]
c = RpcClient(holder_address)
txf = TransferRequestTxFactory(holder_address, c)
tx_transfer = txf.request(t['address'], receiver_address, value, chain_spec)
(tx_hash_hex, tx_signed_raw_hex) = sign_and_register_tx(tx_transfer, chain_str, queue, 'cic_eth.eth.request.otx_cache_transfer_approval_request')
gas_budget = tx_transfer['gas'] * tx_transfer['gasPrice']
s = create_check_gas_and_send_task(
[tx_signed_raw_hex],
chain_str,
holder_address,
gas_budget,
[tx_hash_hex],
queue,
)
s.apply_async()
return [tx_signed_raw_hex]
@celery_app.task()
def otx_cache_transfer_approval_request(
tx_hash_hex,
tx_signed_raw_hex,
chain_str,
):
"""Generates and commits transaction cache metadata for an TransferApproval.request transaction
:param tx_hash_hex: Transaction hash
:type tx_hash_hex: str, 0x-hex
:param tx_signed_raw_hex: Raw signed transaction
:type tx_signed_raw_hex: str, 0x-hex
:param chain_str: Chain spec string representation
:type chain_str: str
:returns: Transaction hash and id of cache element in storage backend, respectively
:rtype: tuple
"""
chain_spec = ChainSpec.from_chain_str(chain_str)
tx_signed_raw_bytes = bytes.fromhex(tx_signed_raw_hex[2:])
tx = unpack_signed_raw_tx(tx_signed_raw_bytes, chain_spec.chain_id())
logg.debug('in otx acche transfer approval request')
(txc, cache_id) = cache_transfer_approval_request_data(tx_hash_hex, tx)
return txc
@celery_app.task()
def cache_transfer_approval_request_data(
tx_hash_hex,
tx,
):
"""Helper function for otx_cache_transfer_approval_request
:param tx_hash_hex: Transaction hash
:type tx_hash_hex: str, 0x-hex
:param tx: Signed raw transaction
:type tx: str, 0x-hex
:returns: Transaction hash and id of cache element in storage backend, respectively
:rtype: tuple
"""
tx_data = unpack_transfer_approval_request(tx['data'])
logg.debug('tx approval request data {}'.format(tx_data))
logg.debug('tx approval request {}'.format(tx))
session = SessionBase.create_session()
tx_cache = TxCache(
tx_hash_hex,
tx['from'],
tx_data['to'],
tx_data['token'],
tx_data['token'],
tx_data['amount'],
tx_data['amount'],
)
session.add(tx_cache)
session.commit()
cache_id = tx_cache.id
session.close()
return (tx_hash_hex, cache_id)

29
apps/cic-eth/cic_eth/eth/tx.py
View File

@@ -69,7 +69,6 @@ def check_gas(self, tx_hashes, chain_str, txs=[], address=None, gas_required=Non
for i in range(len(tx_hashes)):
o = get_tx(tx_hashes[i])
txs.append(o['signed_tx'])
logg.debug('ooooo {}'.format(o))
if address == None:
address = o['address']
@@ -178,12 +177,7 @@ class ParityNodeHandler:
def handle(self, exception, tx_hash_hex, tx_hex):
meth = self.handle_default
if isinstance(exception, (ValueError)):
# s_debug = celery.signature(
# 'cic_eth.admin.debug.out_tmp',
# [tx_hash_hex, '{}: {}'.format(tx_hash_hex, exception)],
# queue=queue,
# )
# s_debug.apply_async()
earg = exception.args[0]
if earg['code'] == -32010:
logg.debug('skipping lock for code {}'.format(earg['code']))
@@ -191,14 +185,15 @@ class ParityNodeHandler:
elif earg['code'] == -32602:
meth = self.handle_invalid_encoding
else:
# TODO: move to status log db comment field
meth = self.handle_invalid
elif isinstance(exception, (requests.exceptions.ConnectionError)):
meth = self.handle_connection
(t, e_fn, message) = meth(tx_hash_hex, tx_hex)
(t, e_fn, message) = meth(tx_hash_hex, tx_hex, str(exception))
return (t, e_fn, '{} {}'.format(message, exception))
def handle_connection(self, tx_hash_hex, tx_hex):
def handle_connection(self, tx_hash_hex, tx_hex, debugstr=None):
s_set_sent = celery.signature(
'cic_eth.queue.tx.set_sent_status',
[
@@ -211,7 +206,7 @@ class ParityNodeHandler:
return (t, TemporaryTxError, 'Sendfail {}'.format(tx_hex_string(tx_hex, self.chain_spec.chain_id())))
def handle_invalid_encoding(self, tx_hash_hex, tx_hex):
def handle_invalid_encoding(self, tx_hash_hex, tx_hex, debugstr=None):
tx_bytes = bytes.fromhex(tx_hex[2:])
tx = unpack_signed_raw_tx(tx_bytes, self.chain_spec.chain_id())
s_lock = celery.signature(
@@ -258,7 +253,7 @@ class ParityNodeHandler:
return (t, PermanentTxError, 'Reject invalid encoding {}'.format(tx_hex_string(tx_hex, self.chain_spec.chain_id())))
def handle_invalid_parameters(self, tx_hash_hex, tx_hex):
def handle_invalid_parameters(self, tx_hash_hex, tx_hex, debugstr=None):
s_sync = celery.signature(
'cic_eth.eth.tx.sync_tx',
[
@@ -271,7 +266,7 @@ class ParityNodeHandler:
return (t, PermanentTxError, 'Reject invalid parameters {}'.format(tx_hex_string(tx_hex, self.chain_spec.chain_id())))
def handle_invalid(self, tx_hash_hex, tx_hex):
def handle_invalid(self, tx_hash_hex, tx_hex, debugstr=None):
tx_bytes = bytes.fromhex(tx_hex[2:])
tx = unpack_signed_raw_tx(tx_bytes, self.chain_spec.chain_id())
s_lock = celery.signature(
@@ -289,6 +284,16 @@ class ParityNodeHandler:
[],
queue=self.queue,
)
s_debug = celery.signature(
'cic_eth.admin.debug.alert',
[
tx_hash_hex,
tx_hash_hex,
debugstr,
],
queue=queue,
)
s_set_reject.link(s_debug)
s_lock.link(s_set_reject)
t = s_lock.apply_async()
return (t, PermanentTxError, 'Reject invalid {}'.format(tx_hex_string(tx_hex, self.chain_spec.chain_id())))