def on_deposit(self, address: CryptoAddress, opid, log_data,
log_entry) -> CryptoAddressDeposit:
"""Handle Hosted Wallet Deposit event.
Create incoming holding account holding the ETH assets until we receive enough confirmations.
"""
op = CryptoAddressDeposit(address.network)
# Get or create final account where we deposit the transaction
asset = get_ether_asset(self.dbsession, network=address.network)
crypto_account = address.get_or_create_account(asset)
op.crypto_account = crypto_account
op.external_address = eth_address_to_bin(log_data["from"])
# Create holding account that keeps the value until we receive N amount of confirmations
acc = Account(asset=asset)
self.dbsession.add(acc)
self.dbsession.flush()
value = wei_to_eth(log_data["value"])
acc.do_withdraw_or_deposit(
value, "ETH deposit from {} in tx {}".format(
log_data["from"], log_entry["transactionHash"]))
op.holding_account = acc
return op
def handle_event(self, event_name: str, contract_address: str,
log_data: dict, log_entry: dict):
"""Map incoming EVM log to database entry."""
opid = self.get_unique_transaction_id(log_entry)
existing_op = self.get_existing_op(opid, CryptoOperationType.deposit)
if existing_op:
# Already in the database, all we need to do is to call blocknumber updater now
return False
network = self.dbsession.query(AssetNetwork).get(self.network_id)
asset = self.dbsession.query(Asset).filter_by(
network=network,
external_id=eth_address_to_bin(contract_address)).one()
if event_name == "Transfer":
to_address = eth_address_to_bin(log_data["to"])
from_address = eth_address_to_bin(log_data["from"])
value = Decimal(log_data["value"])
self.logger.debug("Incoming transfer event %s %s %s", from_address,
to_address, value)
# Get destination address entry
address = self.dbsession.query(CryptoAddress).filter_by(
address=to_address).one_or_none()
if not address:
# Address not in our system
return False
# Create operation
op = CryptoAddressDeposit(network=network)
op.opid = opid
op.txid = txid_to_bin(log_entry["transactionHash"])
op.external_address = from_address
op.block = int(log_entry["blockNumber"], 16)
op.required_confirmation_count = self.confirmation_count
op.crypto_account = address.get_or_create_account(asset)
# Create holding account that keeps the value until we receive N amount of confirmations
acc = Account(asset=asset)
self.dbsession.add(acc)
self.dbsession.flush()
acc.do_withdraw_or_deposit(
value, "Token {} deposit from {} in tx {}".format(
asset.symbol, log_data["from"],
log_entry["transactionHash"]))
op.holding_account = acc
self.dbsession.add(op)
self.notify_deposit(op)
return True
else:
# Unmonitored event
return False