def sign_transaction(self, tx):
"""Sign a provided transaction, either with our private key or a Trezor hardware wallet.
:param tx: Transaction to sign
:return: Signed transaction
"""
logger.info('Signing transaction: %s', tx)
if self.trezor is not None:
chain_id = tx['chainId']
txobj = Transaction(
nonce=tx['nonce'],
gasprice=tx['gasPrice'],
startgas=tx['gas'],
to=tx['to'],
value=tx['value'],
data=bytes.fromhex(tx['data'][2:]),
)
v, r, s = trezoreth.sign_tx(
self.trezor,
n=self.address_n,
nonce=txobj.nonce,
gas_price=txobj.gasprice,
gas_limit=txobj.startgas,
to=txobj.to,
value=txobj.value,
data=txobj.data,
chain_id=chain_id,
)
r = int.from_bytes(r, byteorder='big')
s = int.from_bytes(s, byteorder='big')
return rlp.encode(txobj.copy(v=v, r=r, s=s))
else:
return self.w3.eth.account.signTransaction(
tx, self.priv_key).rawTransaction
