366 lines
11 KiB
Python
366 lines
11 KiB
Python
# standard imports
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import logging
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# third-party imports
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import web3
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import celery
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from cic_registry import CICRegistry
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from cic_registry.chain import ChainSpec
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from erc20_single_shot_faucet import Faucet
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from cic_registry import zero_address
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# local import
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from cic_eth.eth import RpcClient
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from cic_eth.eth import registry_extra_identifiers
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from cic_eth.eth.task import sign_and_register_tx
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from cic_eth.eth.task import create_check_gas_and_send_task
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from cic_eth.eth.factory import TxFactory
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from cic_eth.db.models.nonce import Nonce
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from cic_eth.db.models.base import SessionBase
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from cic_eth.db.models.role import AccountRole
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from cic_eth.db.models.tx import TxCache
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from cic_eth.eth.util import unpack_signed_raw_tx
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from cic_eth.error import RoleMissingError
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#logg = logging.getLogger(__name__)
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logg = logging.getLogger()
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celery_app = celery.current_app
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class AccountTxFactory(TxFactory):
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"""Factory for creating account index contract transactions
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"""
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def add(
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self,
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address,
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chain_spec,
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):
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"""Register an Ethereum account address with the on-chain account registry
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:param address: Ethereum account address to add
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:type address: str, 0x-hex
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:param chain_spec: Chain to build transaction for
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:type chain_spec: cic_registry.chain.ChainSpec
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:returns: Unsigned "AccountRegistry.add" transaction in standard Ethereum format
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:rtype: dict
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"""
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c = CICRegistry.get_contract(chain_spec, 'AccountRegistry')
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f = c.function('add')
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tx_add_buildable = f(
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address,
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)
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gas = c.gas('add')
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tx_add = tx_add_buildable.buildTransaction({
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'from': self.address,
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'gas': gas,
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'gasPrice': self.gas_price,
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'chainId': chain_spec.chain_id(),
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'nonce': self.next_nonce(),
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'value': 0,
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})
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return tx_add
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def gift(
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self,
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address,
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chain_spec,
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):
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"""Trigger the on-chain faucet to disburse tokens to the provided Ethereum account
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:param address: Ethereum account address to gift to
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:type address: str, 0x-hex
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:param chain_spec: Chain to build transaction for
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:type chain_spec: cic_registry.chain.ChainSpec
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:returns: Unsigned "Faucet.giveTo" transaction in standard Ethereum format
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:rtype: dict
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"""
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c = CICRegistry.get_contract(chain_spec, 'Faucet')
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f = c.function('giveTo')
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tx_add_buildable = f(address)
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gas = c.gas('add')
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tx_add = tx_add_buildable.buildTransaction({
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'from': self.address,
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'gas': gas,
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'gasPrice': self.gas_price,
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'chainId': chain_spec.chain_id(),
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'nonce': self.next_nonce(),
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'value': 0,
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})
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return tx_add
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def unpack_register(data):
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"""Verifies that a transaction is an "AccountRegister.add" transaction, and extracts call parameters from it.
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:param data: Raw input data from Ethereum transaction.
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:type data: str, 0x-hex
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:raises ValueError: Function signature does not match AccountRegister.add
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:returns: Parsed parameters
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:rtype: dict
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"""
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f = data[2:10]
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if f != '0a3b0a4f':
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raise ValueError('Invalid account index register data ({})'.format(f))
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d = data[10:]
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return {
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'to': web3.Web3.toChecksumAddress('0x' + d[64-40:64]),
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}
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def unpack_gift(data):
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"""Verifies that a transaction is a "Faucet.giveTo" transaction, and extracts call parameters from it.
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:param data: Raw input data from Ethereum transaction.
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:type data: str, 0x-hex
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:raises ValueError: Function signature does not match AccountRegister.add
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:returns: Parsed parameters
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:rtype: dict
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"""
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f = data[2:10]
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if f != '63e4bff4':
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raise ValueError('Invalid account index register data ({})'.format(f))
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d = data[10:]
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return {
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'to': web3.Web3.toChecksumAddress('0x' + d[64-40:64]),
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}
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@celery_app.task()
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def create(password, chain_str):
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"""Creates and stores a new ethereum account in the keystore.
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The password is passed on to the wallet backend, no encryption is performed in the task worker.
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:param password: Password to encrypt private key with
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:type password: str
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Ethereum address of newly created account
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:rtype: str, 0x-hex
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"""
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chain_spec = ChainSpec.from_chain_str(chain_str)
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c = RpcClient(chain_spec)
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a = c.w3.eth.personal.new_account(password)
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logg.debug('created account {}'.format(a))
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# Initialize nonce provider record for account
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n = c.w3.eth.getTransactionCount(a, 'pending')
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session = SessionBase.create_session()
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o = session.query(Nonce).filter(Nonce.address_hex==a).first()
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if o == None:
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o = Nonce()
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o.address_hex = a
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o.nonce = n
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session.add(o)
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session.commit()
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session.close()
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return a
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@celery_app.task(bind=True, throws=(RoleMissingError,))
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def register(self, account_address, chain_str, writer_address=None):
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"""Creates a transaction to add the given address to the accounts index.
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:param account_address: Ethereum address to add
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:type account_address: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:param writer_address: Specify address in keystore to sign transaction. Overrides local accounts role setting.
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:type writer_address: str, 0x-hex
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:raises RoleMissingError: Writer address not set and writer role not found.
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:returns: The account_address input param
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:rtype: str, 0x-hex
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"""
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chain_spec = ChainSpec.from_chain_str(chain_str)
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if writer_address == None:
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writer_address = AccountRole.get_address('ACCOUNTS_INDEX_WRITER')
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if writer_address == zero_address:
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raise RoleMissingError(account_address)
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logg.debug('adding account address {} to index; writer {}'.format(account_address, writer_address))
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queue = self.request.delivery_info['routing_key']
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c = RpcClient(chain_spec, holder_address=writer_address)
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txf = AccountTxFactory(writer_address, c)
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tx_add = txf.add(account_address, chain_spec)
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(tx_hash_hex, tx_signed_raw_hex) = sign_and_register_tx(tx_add, chain_str, queue, 'cic_eth.eth.account.cache_account_data')
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gas_budget = tx_add['gas'] * tx_add['gasPrice']
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logg.debug('register user tx {}'.format(tx_hash_hex))
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s = create_check_gas_and_send_task(
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[tx_signed_raw_hex],
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chain_str,
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writer_address,
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gas_budget,
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tx_hashes_hex=[tx_hash_hex],
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queue=queue,
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)
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s.apply_async()
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return account_address
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@celery_app.task(bind=True)
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def gift(self, account_address, chain_str):
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"""Creates a transaction to invoke the faucet contract for the given address.
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:param account_address: Ethereum address to give to
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:type account_address: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Raw signed transaction
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:rtype: list with transaction as only element
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"""
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chain_spec = ChainSpec.from_chain_str(chain_str)
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logg.debug('gift account address {} to index'.format(account_address))
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queue = self.request.delivery_info['routing_key']
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c = RpcClient(chain_spec, holder_address=account_address)
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txf = AccountTxFactory(account_address, c)
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tx_add = txf.gift(account_address, chain_spec)
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(tx_hash_hex, tx_signed_raw_hex) = sign_and_register_tx(tx_add, chain_str, queue, 'cic_eth.eth.account.cache_gift_data')
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gas_budget = tx_add['gas'] * tx_add['gasPrice']
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logg.debug('register user tx {}'.format(tx_hash_hex))
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s = create_check_gas_and_send_task(
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[tx_signed_raw_hex],
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chain_str,
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account_address,
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gas_budget,
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[tx_hash_hex],
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queue=queue,
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)
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s.apply_async()
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return [tx_signed_raw_hex]
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@celery_app.task(bind=True)
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def have(self, account, chain_str):
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"""Check whether the given account exists in keystore
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:param account: Account to check
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:type account: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Account, or None if not exists
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:rtype: Varies
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"""
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c = RpcClient(account)
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try:
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c.w3.eth.sign(account, text='2a')
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return account
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except Exception as e:
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logg.debug('cannot sign with {}: {}'.format(account, e))
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return None
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@celery_app.task(bind=True)
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def role(self, account, chain_str):
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"""Return account role for address
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:param account: Account to check
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:type account: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Account, or None if not exists
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:rtype: Varies
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"""
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return AccountRole.role_for(account)
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@celery_app.task()
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def cache_gift_data(
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tx_hash_hex,
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tx_signed_raw_hex,
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chain_str,
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):
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"""Generates and commits transaction cache metadata for a Faucet.giveTo transaction
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:param tx_hash_hex: Transaction hash
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:type tx_hash_hex: str, 0x-hex
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:param tx_signed_raw_hex: Raw signed transaction
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:type tx_signed_raw_hex: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Transaction hash and id of cache element in storage backend, respectively
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:rtype: tuple
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"""
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chain_spec = ChainSpec.from_chain_str(chain_str)
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c = RpcClient(chain_spec)
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tx_signed_raw_bytes = bytes.fromhex(tx_signed_raw_hex[2:])
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tx = unpack_signed_raw_tx(tx_signed_raw_bytes, chain_spec.chain_id())
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tx_data = unpack_gift(tx['data'])
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tx_cache = TxCache(
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tx_hash_hex,
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tx['from'],
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tx['to'],
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zero_address,
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zero_address,
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0,
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0,
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)
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session = SessionBase.create_session()
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session.add(tx_cache)
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session.commit()
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cache_id = tx_cache.id
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session.close()
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return (tx_hash_hex, cache_id)
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@celery_app.task()
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def cache_account_data(
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tx_hash_hex,
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tx_signed_raw_hex,
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chain_str,
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):
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"""Generates and commits transaction cache metadata for an AccountsIndex.add transaction
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:param tx_hash_hex: Transaction hash
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:type tx_hash_hex: str, 0x-hex
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:param tx_signed_raw_hex: Raw signed transaction
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:type tx_signed_raw_hex: str, 0x-hex
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:param chain_str: Chain spec string representation
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:type chain_str: str
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:returns: Transaction hash and id of cache element in storage backend, respectively
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:rtype: tuple
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"""
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chain_spec = ChainSpec.from_chain_str(chain_str)
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c = RpcClient(chain_spec)
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tx_signed_raw_bytes = bytes.fromhex(tx_signed_raw_hex[2:])
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tx = unpack_signed_raw_tx(tx_signed_raw_bytes, chain_spec.chain_id())
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tx_data = unpack_register(tx['data'])
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tx_cache = TxCache(
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tx_hash_hex,
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tx['from'],
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tx['to'],
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zero_address,
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zero_address,
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0,
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0,
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)
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session = SessionBase.create_session()
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session.add(tx_cache)
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session.commit()
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cache_id = tx_cache.id
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session.close()
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return (tx_hash_hex, cache_id)
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