Role-based Account Key

AccountKeyRoleBased represents a role-based key. If an account has an AccountKeyRoleBased object and the transaction type is one except account update, the validation process is done according to each roles like below:

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

Define sender address, sender private key and new role-based private keys 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 updater role private key and provider

Compute the public keys from the new role-based private keys

Declare a transaction in the keys field with the computed role-based public keys

Sign the transaction with sender's wallet

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

AccountUpdateWithRoleBased.js


const { Web3, TxType, AccountKeyType, getPublicKeyFromPrivate } = require("@kaiachain/web3js-ext");
const senderAddr = "0x334b4d3c775c45c59de54e9f0408cba25a1aece7";
const senderRoleTransactionPriv = "0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac";
const senderRoleAccountUpdatePriv = "0x9ba8cb8f60044058a9e6f815c5c42d3a216f47044c61a1750b6d29ddc7f34bda";
const senderRoleFeePayerPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");
const web3 = new Web3(provider);
const updaterAccount = web3.eth.accounts.privateKeyToAccount(senderRoleAccountUpdatePriv);
async function main() {
  const pub1 = getPublicKeyFromPrivate(senderRoleTransactionPriv);
  const pub2 = getPublicKeyFromPrivate(senderRoleAccountUpdatePriv);
  const pub3 = getPublicKeyFromPrivate(senderRoleFeePayerPriv);
  console.log({ pub1, pub2, pub3 });
  const tx = {
    type: TxType.AccountUpdate,
    from: senderAddr,
    gasLimit: 100_000,
    key: {
      type: AccountKeyType.RoleBased,
      keys: [
        { type: AccountKeyType.Public, key: pub1 }, // RoleTransaction
        { type: AccountKeyType.Public, key: pub2 }, // RoleAccountUpdate
        { type: AccountKeyType.Public, key: pub3 }, // RoleFeePayer
      ]
    }
  };
  const signResult = await updaterAccount.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 AccountUpdateWithRoleBased.js
{
  pub1: '0x03f26489914098c5da51f0f646e3000da4d6197217df082b4f7ce1530f0a0cbf2a',
  pub2: '0x0263021199702b9fefca617bdcb2a9ed4a810dfa8d270d4e804a1e778450e63ec3',
  pub3: '0x03dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd'
}
sentTx 0xcb8e1fc03088f2a00d44c31ce1c5f4913d3cf11403d60014a245ae44aa4c2a2f
receipt {
  to: '0x5bD2fb3c21564C023A4A735935a2B7A238C4cCEA',
  from: '0x5bD2fb3c21564C023A4A735935a2B7A238C4cCEA',
  contractAddress: null,
  transactionIndex: 1,
  gasUsed: BigNumber { _hex: '0x013c68', _isBigNumber: true },
  logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
  blockHash: '0xb9145a53ef85bc4b375de828d9c3387cadc6bcd8f81a8d8eaf4f0331a2d7a5c0',
  transactionHash: '0xcb8e1fc03088f2a00d44c31ce1c5f4913d3cf11403d60014a245ae44aa4c2a2f',
  logs: [],
  blockNumber: 152203576,
  confirmations: 2,
  cumulativeGasUsed: BigNumber { _hex: '0x0377d6', _isBigNumber: true },
  effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },
  status: 1,
  type: 0,
  byzantium: true
}