126 lines
4.1 KiB
Python
126 lines
4.1 KiB
Python
# standard imports
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import logging
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# third-party imports
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import celery
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from cic_registry.chain import ChainSpec
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# local imports
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from cic_eth.eth import RpcClient
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from cic_eth.queue.tx import create as queue_create
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celery_app = celery.current_app
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logg = celery_app.log.get_default_logger()
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@celery_app.task()
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def sign_tx(tx, chain_str):
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"""Sign a single transaction against the given chain specification.
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:param tx: Transaction in standard Ethereum format
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:type tx: dict
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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 raw signed transaction, 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_transfer_signed = c.w3.eth.sign_transaction(tx)
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logg.debug('tx_transfer_signed {}'.format(tx_transfer_signed))
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tx_hash = c.w3.keccak(hexstr=tx_transfer_signed['raw'])
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tx_hash_hex = tx_hash.hex()
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return (tx_hash_hex, tx_transfer_signed['raw'],)
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def sign_and_register_tx(tx, chain_str, queue, cache_task=None, session=None):
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"""Signs the provided transaction, and adds it to the transaction queue cache (with status PENDING).
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:param tx: Standard ethereum transaction data
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:type tx: dict
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:param chain_str: Chain spec, string representation
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:type chain_str: str
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:param queue: Task queue
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:type queue: str
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:param cache_task: Cache task to call with signed transaction. If None, no task will be called.
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:type cache_task: str
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:raises: sqlalchemy.exc.DatabaseError
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:returns: Tuple; Transaction hash, signed raw transaction data
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:rtype: tuple
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"""
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(tx_hash_hex, tx_signed_raw_hex) = sign_tx(tx, chain_str)
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logg.debug('adding queue tx {}'.format(tx_hash_hex))
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queue_create(
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tx['nonce'],
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tx['from'],
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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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session=session,
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)
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if cache_task != None:
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logg.debug('adding cache task {} tx {}'.format(cache_task, tx_hash_hex))
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s_cache = celery.signature(
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cache_task,
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[
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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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queue=queue,
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)
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s_cache.apply_async()
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return (tx_hash_hex, tx_signed_raw_hex,)
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# TODO: rename as we will not be sending task in the chain, this is the responsibility of the dispatcher
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def create_check_gas_and_send_task(tx_signed_raws_hex, chain_str, holder_address, gas, tx_hashes_hex=None, queue=None):
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"""Creates a celery task signature for a check_gas task that adds the task to the outgoing queue to be processed by the dispatcher.
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If tx_hashes_hex is not spefified, a preceding task chained to check_gas must supply the transaction hashes as its return value.
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:param tx_signed_raws_hex: Raw signed transaction data
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:type tx_signed_raws_hex: list of 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 holder_address: Address sending the transactions
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:type holder_address: str, 0x-hex
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:param gas: Gas budget hint for transactions
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:type gas: int
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:param tx_hashes_hex: Transaction hashes
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:type tx_hashes_hex: list of str, 0x-hex
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:param queue: Task queue
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:type queue: str
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:returns: Signature of task chain
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:rtype: celery.Signature
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"""
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s_check_gas = None
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if tx_hashes_hex != None:
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s_check_gas = celery.signature(
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'cic_eth.eth.tx.check_gas',
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[
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tx_hashes_hex,
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chain_str,
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tx_signed_raws_hex,
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holder_address,
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gas,
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],
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queue=queue,
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)
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else:
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s_check_gas = celery.signature(
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'cic_eth.eth.tx.check_gas',
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[
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chain_str,
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tx_signed_raws_hex,
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holder_address,
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gas,
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],
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queue=queue,
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)
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return s_check_gas
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