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's address and role-based private keys

Define receiver's address

Set up the provider with the specified kaia Baobab testnet URL. A provider in web3js is a read-only abstraction to access the blockchain data.

Also, you can change the provider URL from baobab to allthatnode

Define a web3 instance using the provider

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

Create a value transfer transaction with type: TxType.ValueTransfer

Sign the transaction with the wallet that has role sending transaction

Send the signed transaction to kaia network

Recover the address from signed transaction using web3.klay.recoverFromTransaction

SignTxWithRoleBasedExample.js

const { Web3, TxType, toPeb } = require("@kaiachain/web3js-ext");

const senderAddr = "0x334b4d3c775c45c59de54e9f0408cba25a1aece7";

const senderRoleTransactionPriv = "0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac";

const senderRoleAccountUpdatePriv = "0x9ba8cb8f60044058a9e6f815c5c42d3a216f47044c61a1750b6d29ddc7f34bda";

const senderRoleFeePayerPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

const receiverAddr = "0xc40b6909eb7085590e1c26cb3becc25368e249e9";

const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");

const web3 = new Web3(provider);

const txAccount = web3.eth.accounts.privateKeyToAccount(senderRoleTransactionPriv);

async function main() {

let tx = {

type: TxType.ValueTransfer,

from: senderAddr,

to: receiverAddr,

value: toPeb("0.01", "KLAY"),

gasLimit: 100000,

};

const signResult = await txAccount.signTransaction(tx);

console.log("signedTx", signResult.transactionHash);

const receipt = await web3.eth.sendSignedTransaction(signResult.rawTransaction);

console.log("receipt", receipt);

const sig = signResult.signature;

const addr2 = await web3.klay.recoverFromTransaction(senderAddr, sig, "latest");

console.log("recoveredAddr rpc", addr2, addr2.toLowerCase() === senderAddr);

}

main().catch(console.error);

output

❯ js SignTxWithRoleBasedExample.js

rawTx 0x08f88641850ba43b7400830186a094c40b6909eb7085590e1c26cb3becc25368e249e9872386f26fc10000945bd2fb3c21564c023a4a735935a2b7a238c4cceaf847f8458207f6a04886eb1e6d8d5ee59fe4d125b40080409c3341fdc0a7e04b612e7d802edbeaeba0415c08f73a3789f6c27177bb5326579ffbe96f8e0db7090b08ce2fe059d949a9

sentTx 0x3f7ee99c699ad2143bf0fac72dac1ff689c992e382e4705f7366aceaecc09477

receipt {

to: '0xC40B6909EB7085590E1c26Cb3beCC25368e249E9',

from: '0x5bD2fb3c21564C023A4A735935a2B7A238C4cCEA',

contractAddress: null,

transactionIndex: 2,

gasUsed: BigNumber { _hex: '0x5208', _isBigNumber: true },

logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',

blockHash: '0x74c7b258b81b75866cfa0b60a08be9aa23cdbd113eb314b2258b65f00475790e',

transactionHash: '0x3f7ee99c699ad2143bf0fac72dac1ff689c992e382e4705f7366aceaecc09477',

logs: [],

blockNumber: 152257043,

confirmations: 1,

cumulativeGasUsed: BigNumber { _hex: '0x062366', _isBigNumber: true },

effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },

status: 1,

type: 0,

byzantium: true

}

recoveredAddr rpc 0x5bd2fb3c21564c023a4a735935a2b7a238c4ccea true