chainlib-eth/example/tx_object.py

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# standard imports
import os
# external imports
from crypto_dev_signer.keystore.dict import DictKeystore
from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
from crypto_dev_signer.eth.transaction import EIP155Transaction
from hexathon import (
add_0x,
strip_0x,
)
# local imports
from chainlib.chain import ChainSpec
from chainlib.eth.tx import (
unpack,
Tx,
)
# eth transactions need an explicit chain parameter as part of their signature
chain_spec = ChainSpec.from_chain_str('evm:ethereum:1')
chain_id = chain_spec.chain_id()
# create keystore and signer
keystore = DictKeystore()
signer = EIP155Signer(keystore)
sender_address = keystore.new()
recipient_address = keystore.new()
# set up a transaction dict source
tx_src = {
'from': sender_address,
'to': recipient_address,
'gas': 21000,
'gasPrice': 1000000000,
'value': 1024,
'data': '0xdeadbeef',
}
sender_nonce = 0
tx = EIP155Transaction(tx_src, sender_nonce, chain_id)
signature = signer.sign_transaction(tx)
print('signature: {}'.format(signature.hex()))
tx.apply_signature(chain_id, signature)
print('tx with signature: {}'.format(tx.serialize()))
tx_signed_raw_bytes = tx.rlp_serialize()
tx_src = unpack(tx_signed_raw_bytes, chain_spec)
tx_parsed = Tx(tx_src)
print('parsed signed tx: {}'.format(tx_parsed.to_human()))