def withdraw_eth(web3: Web3, dbsession: Session, opid: UUID):
"""Perform ETH withdraw operation from the wallet."""
@retryable(tm=dbsession.transaction_manager)
def prepare_withdraw():
# Check everyting looks sane
op = dbsession.query(CryptoOperation).get(opid)
assert op.crypto_account.id
assert op.crypto_account.account.id
assert op.holding_account.id
assert op.holding_account.get_balance() > 0
assert op.external_address
assert op.required_confirmation_count # Should be set by the creator
address = bin_to_eth_address(op.crypto_account.address.address)
# How much we are withdrawing
amount = op.holding_account.transactions.one().amount
op.mark_performed() # Don't pick this to action list anymore
gas = op.other_data.get("gas")
data = op.other_data.get("data")
return address, amount, op.external_address, gas, data
@retryable(tm=dbsession.transaction_manager)
def close_withdraw():
# Fill in details.
# Block number will be filled in later, when confirmation updater picks a transaction receipt for this operation.
op = dbsession.query(CryptoOperation).get(opid)
op.txid = txid_to_bin(txid)
op.block = None
op.mark_broadcasted()
address, amount, external_address, gas, data = prepare_withdraw()
# Do actual network communications outside the transaction,
# so we avoid double withdraws in the case transaction is retried
wallet = HostedWallet.get(web3, address)
txid = wallet.withdraw(bin_to_eth_address(external_address),
amount,
max_gas=gas,
data=data)
close_withdraw()
def withdraw_token(web3: Web3, dbsession: Session, opid: UUID):
"""Perform token withdraw operation from the wallet."""
@retryable(tm=dbsession.transaction_manager)
def prepare_withdraw():
# Check everyting looks sane
op = dbsession.query(CryptoOperation).get(opid)
assert op.crypto_account.id
assert op.crypto_account.account.id
assert op.holding_account.id
assert op.holding_account.get_balance() > 0
assert op.external_address
assert op.required_confirmation_count # Should be set by the creator
asset = op.holding_account.asset
assert asset.asset_class == AssetClass.token
from_address = bin_to_eth_address(op.crypto_account.address.address)
to_address = bin_to_eth_address(op.external_address)
asset_address = bin_to_eth_address(asset.external_id)
# How much we are withdrawing
amount = op.holding_account.transactions.one().amount
op.mark_performed() # Don't try to pick this op automatically again
return from_address, to_address, asset_address, amount
@retryable(tm=dbsession.transaction_manager)
def close_withdraw():
# Fill in details.
# Block number will be filled in later, when confirmation updater picks a transaction receipt for this operation.
op = dbsession.query(CryptoOperation).get(opid)
op.txid = txid_to_bin(txid)
op.block = None
op.mark_broadcasted()
from_address, to_address, asset_address, amount = prepare_withdraw()
wallet = HostedWallet.get(web3, from_address)
token = Token.get(web3, asset_address)
amount = token.validate_transfer_amount(amount)
# Perform actual transfer outside retryable transaction
# boundaries to avoid double withdrwa
txid = wallet.execute(token.contract, "transfer", [to_address, amount])
close_withdraw()
def withdraw_token(web3: Web3, dbsession: Session, opid: UUID):
"""Perform token withdraw operation from the wallet."""
@retryable(tm=dbsession.transaction_manager)
def prepare_withdraw():
# Check everyting looks sane
op = dbsession.query(CryptoOperation).get(opid)
assert op.crypto_account.id
assert op.crypto_account.account.id
assert op.holding_account.id
assert op.holding_account.get_balance() > 0
assert op.external_address
assert op.required_confirmation_count # Should be set by the creator
asset = op.holding_account.asset
assert asset.asset_class == AssetClass.token
from_address = bin_to_eth_address(op.crypto_account.address.address)
to_address = bin_to_eth_address(op.external_address)
asset_address = bin_to_eth_address(asset.external_id)
# How much we are withdrawing
amount = op.holding_account.transactions.one().amount
op.mark_performed() # Don't try to pick this op automatically again
return from_address, to_address, asset_address, amount
@retryable(tm=dbsession.transaction_manager)
def close_withdraw():
# Fill in details.
# Block number will be filled in later, when confirmation updater picks a transaction receipt for this operation.
op = dbsession.query(CryptoOperation).get(opid)
op.txid = txid_to_bin(txid)
op.block = None
op.mark_broadcasted()
from_address, to_address, asset_address, amount = prepare_withdraw()
wallet = HostedWallet.get(web3, from_address)
token = Token.get(web3, asset_address)
amount = token.validate_transfer_amount(amount)
# Perform actual transfer outside retryable transaction
# boundaries to avoid double withdrwa
txid = wallet.execute(token.contract, "transfer", [to_address, amount])
close_withdraw()
def withdraw_eth(web3: Web3, dbsession: Session, opid: UUID):
"""Perform ETH withdraw operation from the wallet."""
@retryable(tm=dbsession.transaction_manager)
def prepare_withdraw():
# Check everyting looks sane
op = dbsession.query(CryptoOperation).get(opid)
assert op.crypto_account.id
assert op.crypto_account.account.id
assert op.holding_account.id
assert op.holding_account.get_balance() > 0
assert op.external_address
assert op.required_confirmation_count # Should be set by the creator
address = bin_to_eth_address(op.crypto_account.address.address)
# How much we are withdrawing
amount = op.holding_account.transactions.one().amount
op.mark_performed() # Don't pick this to action list anymore
return address, amount, op.external_address
@retryable(tm=dbsession.transaction_manager)
def close_withdraw():
# Fill in details.
# Block number will be filled in later, when confirmation updater picks a transaction receipt for this operation.
op = dbsession.query(CryptoOperation).get(opid)
op.txid = txid_to_bin(txid)
op.block = None
op.mark_broadcasted()
address, amount, external_address = prepare_withdraw()
# Do actual network communications outside the transaction,
# so we avoid double withdraws in the case transaction is retried
wallet = HostedWallet.get(web3, address)
txid = wallet.withdraw(bin_to_eth_address(external_address), amount)
close_withdraw()
def get_wallet(web3, address):
return HostedWallet.get(web3, address)