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, private key and others weighted multi-sig private keys

Define receiver's address

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 3 different wallets with the weighted multi-sig private keys and provider

Create a value transfer transaction with type: TxType.ValueTransfer

Sign the transaction with first wallet

Sign the transaction with second wallet

Sign the transaction with the third wallet

Send the signed transaction to kaia network and print the receipt

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

SignTxWithMultiSigExample.js

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

const senderAddr = "0x2bf611d14d330fd3688d10f2201321eacc8aa2ce";

const senderPriv1 = "0x31fadf868e68fd2e3f7a1c528023c9a86a45db850e9d6b82c1a82d4c75b469d1";

const senderPriv2 = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

const senderPriv3 = "0xc9668ccd35fc20587aa37a48838b48ccc13cf14dd74c8999dd6a480212d5f7ac";

const receiverAddr = "0x2bf611d14d330fd3688d10f2201321eacc8aa2ce";

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

const web3 = new Web3(provider);

const senderAccount1 = web3.eth.accounts.privateKeyToAccount(senderPriv1);

const senderAccount2 = web3.eth.accounts.privateKeyToAccount(senderPriv2);

const senderAccount3 = web3.eth.accounts.privateKeyToAccount(senderPriv3);

async function main() {

let tx = {

type: TxType.ValueTransfer,

from: senderAddr,

to: receiverAddr,

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

gasLimit: 100000,

};

// The example senderAddr actually requires only 2 signature,

// but we use 3 signatures to show different ways to sign a transaction.

// sign 1: First signer sign from the tx object

const signResult1 = await senderAccount1.signTransaction(tx);

console.log("rawTx1", signResult1.rawTransaction);

// sign 2: Rest of the signers sign from the rawTx

const signResult2 = await senderAccount2.signTransaction(signResult1.rawTransaction);

console.log("rawTx2", signResult2.rawTransaction);

// sign 3: Last signer sign from the rawTx then send it

const signResult3 = await senderAccount3.signTransaction(signResult2.rawTransaction);

console.log("signedTx3", signResult3.transactionHash);

const receipt = await web3.eth.sendSignedTransaction(signResult3.rawTransaction);

console.log("receipt", receipt);

const sig = signResult3.signature;

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

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

}

main().catch(console.error);

output

❯ js SignTxWithMultiSigExample.js

rawTx1 0x08f88676850ba43b7400830186a094c40b6909eb7085590e1c26cb3becc25368e249e9872386f26fc100009482c6a8d94993d49cfd0c1d30f0f8caa65782cc7ef847f8458207f6a008b987d8905dae51b856c478e6f7b49f01f5f2432a90c03d332e61d518100087a07bea2578790b7dabe9f2fe920d1f3183f48dc26d4ce752bf27964433317504e8

rawTx2 0x08f8cd76850ba43b7400830186a094c40b6909eb7085590e1c26cb3becc25368e249e9872386f26fc100009482c6a8d94993d49cfd0c1d30f0f8caa65782cc7ef88ef8458207f6a008b987d8905dae51b856c478e6f7b49f01f5f2432a90c03d332e61d518100087a07bea2578790b7dabe9f2fe920d1f3183f48dc26d4ce752bf27964433317504e8f8458207f6a052dcb9cfd9edf75ea60aa7eafce1a984209722c81a6c17f4f26d4b79adcc2f03a03ef04d7793009b90f7af7831f834ad2892678f0f10f8d6e02d6d76b3e4671a1d

sentTx3 0x1b3b4b8a177ead1602c5052d8c1145a2e9ffc53ac4ce208f4730177486726c6a

receipt {

to: '0xC40B6909EB7085590E1c26Cb3beCC25368e249E9',

from: '0x82C6a8D94993d49cfd0c1D30F0F8Caa65782cc7E',

contractAddress: null,

transactionIndex: 2,

gasUsed: BigNumber { _hex: '0xc738', _isBigNumber: true },

logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',

blockHash: '0x6f5fca2355230874808c4fe1b8459c6d61cf7ba22b864aeba4c3cf61d7a49b99',

transactionHash: '0x1b3b4b8a177ead1602c5052d8c1145a2e9ffc53ac4ce208f4730177486726c6a',

logs: [],

blockNumber: 152258186,

confirmations: 6,

cumulativeGasUsed: BigNumber { _hex: '0x05f70f', _isBigNumber: true },

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

status: 1,

type: 0,

byzantium: true

}

recoveredAddr rpc 0x82c6a8d94993d49cfd0c1d30f0f8caa65782cc7e true