Public Account Key

AccountKeyPublic is used for accounts having one public key. If an account has an AccountKeyPublic object, the transaction validation process is done like below:

Import extend from web3py_ext to extend web3 to kaia web3

Import necessary utils from web3 and web3py_ext

Create a Web3 instance with the specified kairos testnet URL

Also, you can change the provider URL from kairos to quicknode.

Load two accounts from private key

Creating an empty transaction of type TxType.ACCOUNT_UPDATE. You can use empty_tx util to get a tx with default fields filled.

Merge additional fields like sender and keys into the empty tx by using the merge util.

In this case, the account key to update is the public key.

You can use the compressed_key util to set the key. It will extract the compressed public key from the key

Use fill_transaction to add more params to transaction object like gas limit...

You can use the to_pretty util to print the formatted tx.

Sign the account update tx type. You must sign it with the loaded account

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

web3_account_update_pubkey.py


from web3py_ext import extend
from web3 import Web3
from eth_account import Account
from web3py_ext.klaytn_account.utils import compressed_key
from web3py_ext.klaytn_account.account_key import KeyType
from web3py_ext.transaction.transaction import (
    empty_tx,
    fill_transaction,
    TxType
)
from web3py_ext.utils.klaytn_utils import (
    to_pretty,
    bytes_to_hex_str
)
from cytoolz import merge
w3 = Web3(Web3.HTTPProvider(
    'https://public-en-kairos.node.kaia.io'
    ))
def web3_account_update_pubkey():
    user1 = Account.from_key('0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac')
    user2 = Account.from_key('0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8')
    account_update_tx = empty_tx(TxType.ACCOUNT_UPDATE)
    account_update_tx = merge(account_update_tx, {
        'from' : user1.address,
        'key' : {
            'type': KeyType.PUBLIC,
            'key' : compressed_key(user2)
        }
    })
    account_update_tx = fill_transaction(account_update_tx, w3)
    print(to_pretty(account_update_tx))
    # sign the kaia specific transaction type with web3py
    signed_tx = Account.sign_transaction(account_update_tx, user2.key)
    print('\nrawTransaction:', bytes_to_hex_str(signed_tx.rawTransaction))
    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)
web3_account_update_pubkey()

output


❯ py web3_account_update_pubkey.py
# {
#   "from": "0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b",
#   "gas": 159000,
#   "gasPrice": 50000000000,
#   "nonce": 123,
#   "chainId": 1001,
#   "type": 32,
#   "key": {
#     "type": 2,
#     "key": "0x03dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd"
#   }
# }
# rawTransaction: 20f88d7b850ba43b740083026d1894e15cd70a41dfb05e7214004d7d054801b2a2f06ba302a103dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cdf847f8458207f6a0f75f66b00c25910bfa28b70bd9b84be7d992af41803b8127b70db8d277b0d916a055594b060f8efba08cdc9e103e47000f6f83f191ea25a2a49661cc01fc449f2c
# tx hash:  0x300f72798b62b8ff59287d21f186735ec95edaaf90c78ee153a7ab7ad31311fd receipt:  AttributeDict({'blockHash': HexBytes('0xf76ff73748e352ae26e28dbd9485fc30f101999de67800acaa65e1b5b743e1ce'), 'blockNumber': 150554008, 'contractAddress': None, 'cumulativeGasUsed': 234641, 'effectiveGasPrice': 25000000000, 'from': '0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b', 'gasUsed': 41000, 'logs': [], 'logsBloom': HexBytes('0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'), 'status': 1, 'to': '0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b', 'transactionHash': HexBytes('0x300f72798b62b8ff59287d21f186735ec95edaaf90c78ee153a7ab7ad31311fd'), 'transactionIndex': 1, 'type': 0})