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Multisig Account Key

AccountKeyWeightedMultiSig is an account key type containing a threshold and WeightedPublicKeys which contains a list consisting of a public key and its weight.

In order for a transaction to be valid for an account associated with AccountKeyWeightedMultiSig, the following conditions should be satisfied: _ The weighted sum of the signed public keys should be larger than the threshold. _ The invalid signature should not be included in the transaction. * The number of signed public keys should be less than the number of weightedPublicKeys.

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

Define sender's address and private key and all weighted multi-sig private keys

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 wallet with the first weight multi-sig 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 web3.eth.accounts.recover

Recover the address from signed message using web3.klay.recoverFromMessage

SignMsgWithMultiSigExample.js

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

const senderAddr = "0x2bf611d14d330fd3688d10f2201321eacc8aa2ce";

const senderPriv1 = "0x31fadf868e68fd2e3f7a1c528023c9a86a45db850e9d6b82c1a82d4c75b469d1";

const senderPriv2 = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

const senderPriv3 = "0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac";

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

const web3 = new Web3(provider);

async function main() {

const senderAccount = web3.eth.accounts.privateKeyToAccount(senderPriv1);

const msg = "hello";

const msghex = Web3.utils.utf8ToHex(msg);

const signResult = senderAccount.sign(msg);

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

const { v, r, s } = signResult;

const addr1 = web3.eth.accounts.recover(msg, v, r, s);

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

const sig = signResult.signature;

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

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

}

main().catch(console.error);

output

❯ js SignMsgWithMultiSigExample.js

{

senderAddr: '0x2bf611d14d330fd3688d10f2201321eacc8aa2ce',

msg: 'hello',

msghex: '0x68656c6c6f',

sig: '0x514ad395399cb30533cd02f9681b44ed1452f5bb44289e5e2aa042fbc6ba6e2c393d7107e3f8341a240b30f481cc1fce0c66056ba8035c45fd66fcae086b409b1b'

}

recoveredAddr lib 0x2bf611d14d330fD3688D10F2201321eACc8AA2Ce true

recoveredAddr rpc 0x2bf611d14d330fd3688d10f2201321eacc8aa2ce true