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 the ethers and @kaiachain/ethers-ext packages to add kaia features on ethers.js

Define sender address, sender private key and new private key to be changed

Set up the provider with the specified Kairos testnet URL. A provider in ethers is a read-only abstraction to access the blockchain data.

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

Create a sender's wallet with the private key and provider

Compute the public key from the new private key

Declare a transaction which has type AccountKeyType.Public and key field with the new computed public key

Send the tx to the blockchain. Function sendTransaction internally signs with the private key of the account and then transmits it to the blockchain network.

The wait function returns the tx receipt if it is completed in the blockchain.

AccountUpdateWithPubKey.js


const { ethers } = require("ethers");
const { Wallet, TxType, AccountKeyType } = require("@kaiachain/ethers-ext/v6");
// Using senderPriv == senderNewPriv to execute this example repeatedly.
// But you should use AccountKeyPublic to register a different private key.
const senderAddr = "0xe15cd70a41dfb05e7214004d7d054801b2a2f06b";
const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const senderNewPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const provider = new ethers.JsonRpcProvider("https://public-en-kairos.node.kaia.io");
const wallet = new Wallet(senderAddr, senderPriv, provider); // decoupled account
async function main() {
  const senderNewPub = ethers.SigningKey.computePublicKey(senderNewPriv, true);
  console.log("pub", senderNewPub);
  const tx = {
    type: TxType.AccountUpdate,
    from: senderAddr,
    key: {
      type: AccountKeyType.Public,
      key: senderNewPub,
    }
  };
  const sentTx = await wallet.sendTransaction(tx);
  console.log("sentTx", sentTx.hash);
  const receipt = await sentTx.wait();
  console.log("receipt", receipt);
}
main().catch(console.error);

output


❯ js AccountUpdateWithPubKey.js
pub 0x03dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd
sentTx 0x33a634875a49d8915bc6fde14f351b81d1fc470b64aef28bf95d3ea92f2dc4f7
receipt {
  to: '0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b',
  from: '0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b',
  contractAddress: null,
  transactionIndex: 1,
  gasUsed: BigNumber { _hex: '0xa028', _isBigNumber: true },
  logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
  blockHash: '0xb385b18c2e96c36e7fbbeb121cf2a48c0bb15f1a7af2f2969b133236ff7a14ea',
  transactionHash: '0x33a634875a49d8915bc6fde14f351b81d1fc470b64aef28bf95d3ea92f2dc4f7',
  logs: [],
  blockNumber: 152203491,
  confirmations: 2,
  cumulativeGasUsed: BigNumber { _hex: '0x02e456', _isBigNumber: true },
  effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },
  status: 1,
  type: 0,
  byzantium: true
}