Bitcoin: Help! About how to spend OP_checksigadd Multi-sig

Multi-sig transactions saflyly With Bitcoin.js

As a developer who iss Bitcoin.JS, you are likes to encunter the need to manage multiple. The Multi Signature (Multisig) is a hallette gives to authorize and validate events for address. In this article, we will look at how to create a safe and reliable multisig on Bitcoin.js.

Problem: OP_checksigadd

When using op_checksigadd itdds one or more signatures to another public key. Howver, if a valid signature is one, the network is like to reject the event. To allviate this disk, we will a different approach use the OP_checkx and op_equal3-2 throshold.

Creating secured multisig instaltation

To the crate a multisig installation at Bitcoin.JS, you must follow thees:

- This key ownd at least this signatures and at least two of the must be valid.

• Create a secondary account : Create another according to the account for a primemary account. This key owns the signatures (one signature is incorrect).

• Create a shared secret : Useop_checksigto create a common secret between two accounts. This shared secret contains all the necessary for information for authorization.

• Make therd the secret : UseOP_Equalsharedy and one secondary accountary account of signature to check.

sample code

Javascript

Const Bitcoinjs = Require (‘Bitcoinjs-Lib’);

// create a 3-2 throshold account

Const primaccountkey = ‘XPRV …’;

Const commissigpubkey1 = ‘XPRV …’; // 3 signatures

Const commissigpubkey2 = ‘XPRV …’; // 2 signatures

Const commissigpubkey3 = ‘XPRV …’; // Invalid signature

// creates a secondary account

Const secondaryaccountPubkey = ‘XPRV …’;

Const secondary1 = ‘XPRV …’; // less that 4 signatures (one is incorrect)

// Create a shared with the signatures of OP_checksig and one premry account

Async function Generatesharedsecret () {

Const SardecretpubKey = Wait Bitcoinjs.secp256k1.creakeypair (primaryaaccountkeyy);

Const Signature1 = Wait Bitcoinjs.secp256k1.Sign (Sardcretpubkey, Contracnsigpubkey1);

Const Signature2 = Wait Bitcoinjs.Secp256k1.Sign (Sardcretpubkey, ContractorPubkey2);

Const Signature3 = Wait Bitcoinjs.secp256k1.Sign (Sardcretpubkey, ContractorPubkey3);

Return {Sardcret: JSON.Stringify ({secret: Jatuttacretpubkey, signatures: [Signature1, Signature2, Signature3]})};

}

// To securi a shared secret UP_Equal whe secondary account signature

Async function verphysharedsecret (sardecret) {

Const {sardescret: {secret, signatures} = json.parers (sardecret);

Const Signature = Wait Bitcoinjs.secp256k1.Sign (secret, mixed gigmey1);

return signature === signatures [0];

}

// Example use:

Generatesharedsecret ().

Vailysharedsecret (ShareScret) .then (secure => console.log (s));

});

`

Best Practices

• Use safe and reliable seeds for your youworly account.

• Make of this all secondary accounts hve 4 4 ​​signatures (one is incorrect).

• Keep a common secret to prevent unauthorized accesses.

• Consider thee more solid encryption library, souch as the `Bitcoinjs-seec1k1, it is a featty featery of safety.

By following thees and best practices, you can saflyly manage multiplesig in Bitcoin.js. Be it to carefully process sensitive information and Follow the instructions given by the Bitcoin.