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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 @kaiachain/web3js-ext packages to add kaia features on web3

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 web3js is a read-only abstraction to access the blockchain data.

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

Define a web3 instance using the provider

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

Sign the transaction with sender's wallet

Send the signed tx to the blockchain. It will return the receipt of the transaction

AccountUpdateWithPubKey.js


const { Web3, TxType, AccountKeyType, toPeb, getPublicKeyFromPrivate } = require("@kaiachain/web3js-ext");
// Using senderPriv == senderNewPriv to execute this example repeatedly.
// But you might want to register a different private key.
const senderAddr = "0xfb60ded0ae96fe04eed6450aead860aa9d57128e";
const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const senderNewPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");
const web3 = new Web3(provider);
const senderAccount = web3.eth.accounts.privateKeyToAccount(senderPriv);
async function main() {
  const senderNewPub = getPublicKeyFromPrivate(senderNewPriv);
  console.log({ senderNewPub });
  const tx = {
    type: TxType.AccountUpdate,
    from: senderAddr,
    key: {
      type: AccountKeyType.Public,
      key: senderNewPub,
    }
  };
  const signResult = await senderAccount.signTransaction(tx);
  console.log("signedTx", signResult.transactionHash);
  const receipt = await web3.eth.sendSignedTransaction(signResult.rawTransaction);
  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
}