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

Define sender's address, private key and others role-based private keys

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

Define a message to be signed and recovered

Sign the message with sender's wallet

Recover the address from signed message using ethers.verifyMessage

Recover the address from signed message using klay_recoverFromMessage

SignMsgWithRoleBased.js

const { ethers } = require("ethers");

const { Wallet } = require("@kaiachain/ethers-ext/v6");

const senderAddr = "0x5bd2fb3c21564c023a4a735935a2b7a238c4ccea";

const senderPriv = "0x9ba8cb8f60044058a9e6f815c5c42d3a216f47044c61a1750b6d29ddc7f34bda";

const senderRoleTransactionPriv = "0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac";

const senderRoleAccountUpdatePriv = "0x9ba8cb8f60044058a9e6f815c5c42d3a216f47044c61a1750b6d29ddc7f34bda";

const senderRoleFeePayerPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

const provider = new ethers.JsonRpcProvider("https://public-en-kairos.node.kaia.io");

const txWallet = new Wallet(senderAddr, senderPriv, provider);

async function main() {

const msg = "hello";

const msghex = ethers.hexlify(ethers.toUtf8Bytes(msg));

const sig = await txWallet.signMessage(msg);

console.log({ senderAddr, msg, msghex, sig });

const addr1 = ethers.verifyMessage(msg, sig);

console.log("recoveredAddr lib", addr1, addr1.toLowerCase() === senderAddr.toLowerCase());

const addr2 = await provider.send("klay_recoverFromMessage", [senderAddr, msghex, sig, "latest"]);

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

}

main().catch(console.error);

output

❯ js SignMsgWithRoleBased.js

{

senderAddr: '0x5bd2fb3c21564c023a4a735935a2b7a238c4ccea',

msg: 'hello',

msghex: '0x68656c6c6f',

sig: '0x736460622fcfab0fa7de0ca1cde05178f01b124294a640b5f5820c7271262c6c271f1ad15f0d7b974d68eaac60d5daa1e7dd65301bbfb814beecbca1238b64121c'

}

recoveredAddr lib 0x5bD2fb3c21564C023A4A735935a2B7A238C4cCEA true

recoveredAddr rpc 0x5bd2fb3c21564c023a4a735935a2b7a238c4ccea true