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Legacy Account Key

Import extend from web3py_ext to extend web3 to kaia web3

Import necessary utils from web3 and eth_account

Define a web3 connection using Web3.HTTPProvider and RPC endpoint

Also, you can change the provider URL from kairos to quickode

Define a sender's wallet from private key using Account.from_key

Create a transaction with from, to and value fields to transfer.

from: the sender's address, to: target address to receive kaia.

value field means how many kaia you want to send and you can use the Web3.to_peb utils to convert kaia to peb unit.

Use fill_transaction to add rest of the fields of the transaction like gas limit, Nonce, etc. You can print all the fields after this line if you want to see

Sign the transaction with sender private key

Sending the signed transaction to the network and waiting receipt until it is completely executed in the blockchain

Recover sender address with Account.recover_transaction from signed transaction

web3_legacy_value_transfer_sign_recover.py


from web3py_ext import extend
from web3 import Web3
from eth_account import Account
from web3py_ext.transaction.transaction import (
    fill_transaction,
)
w3 = Web3(Web3.HTTPProvider(
    'https://public-en-kairos.node.kaia.io'
    ))
def web3_tx_sign_recover_legacy():
    user = Account.from_key('0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8')
    value_transfer_tx = {
        'from' : user.address,
        'to' : user.address,
        'value' : Web3.to_peb(10, "klay"),
    }
    value_transfer_tx = fill_transaction(value_transfer_tx, w3)
    signed_tx = Account.sign_transaction(value_transfer_tx, user.key)
    tx_hash = w3.eth.send_raw_transaction(signed_tx.rawTransaction)
    tx_receipt = w3.eth.wait_for_transaction_receipt(tx_hash)
    print('tx hash: ', tx_hash, 'receipt: ', tx_receipt)
    recovered_tx = Account.recover_transaction(signed_tx.rawTransaction)
    print("\nsender", user.address, "\nrecovered", recovered_tx)
web3_tx_sign_recover_legacy()

output


❯ py web3_legacy_value_transfer_sign_recover.py
tx hash:  0x26e3137f5a44e64c7238367dc9d4270e63aaedd584ad7854509612fe82d24f74 receipt:  AttributeDict({'blockHash': HexBytes('0xfa5dc338557b4bb74ed640bb95f3249f258469e2ff805f38b437287dce4a5d73'), 'blockNumber': 150557816, 'contractAddress': None, 'cumulativeGasUsed': 21000, 'effectiveGasPrice': 25000000000, 'from': '0xA2a8854b1802D8Cd5De631E690817c253d6a9153', 'gasUsed': 21000, 'logs': [], 'logsBloom': HexBytes('0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'), 'status': 1, 'to': '0xA2a8854b1802D8Cd5De631E690817c253d6a9153', 'transactionHash': HexBytes('0x26e3137f5a44e64c7238367dc9d4270e63aaedd584ad7854509612fe82d24f74'), 'transactionIndex': 0, 'type': 2})
sender 0xA2a8854b1802D8Cd5De631E690817c253d6a9153
recovered 0xA2a8854b1802D8Cd5De631E690817c253d6a9153