Bitcoin: bitcoinjs – mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)

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Bitcoin: BitcoinJS – Mandatory Script-Verify-Flag Failed

Overview

BitcoinJS is a JavaScript library for interacting with the Bitcoin network. It provides a simple and secure way to send, receive, and manage Bitcoin transactions. In this article, we will cover how to use BitcoinJS to support multiple buyers and sellers.

Transaction Example

Below is an example of a transaction that can be sent using BitcoinJS:

const bitcoinjs = require('bitcoinjs-lib');


// Create a new wallet

const wallet = bitcoinjs.Wallet.generate(2048);


// Create a new address

const address1 = await wallet.addresses().getAddressByLabel('myaddress');

const address2 = await wallet.addresses().getAddressByLabel('myseconddaddress');


// Send some Bitcoin to the first address

const sendBitcoinTransaction = {

  from: wallet.addresses().getAddressByLabel('myaddress'),

  to: address1,

  amount: '10',

};

const result = await bitcoinjs.signTransaction(sendBitcoinTransaction);

console.log(result);


// Create a new transaction with multiple signatures

const multiSignatureTransaction = {

  from: wallet.addresses().getAddressByLabel('myseconddaddress'),

  to: address2,

  amount: '20',

  senderSig1: {

    from: wallet.addresses().getAddressByLabel('myseconddaddress'),

    to: address2,

    amount: '10',

    senderSignature: await bitcoinjs.signTransaction({

      from: wallet.addresses().getAddressByLabel('myseconddaddress'),

      to: address2,

      amount: '10',

    }),

  },

  receiverSig1: {

    from: address2,

    to: wallet.addresses().getAddressByLabel('myaddress'),

    amount: '10',

    receiverSignature: await bitcoinjs.signTransaction({

      from: wallet.addresses().getAddressByLabel('myaddress'),

      to: address2,

      amount: '10',

    }),

  },

};


const result = await bitcoinjs.signTransaction(multiSignatureTransaction);

console.log(result);

How it Works

In this example, we create a new transaction with multiple signatures. Each signature is generated using the signTransaction method of the BitcoinJS library.

The multiSignatureTransaction object has two sender signatures: one from the second address and another from the first address. The receiver signatures are also included: one from the second address and one from the first address.

The from parameter specifies the sender address, the to parameter specifies the recipient address, and the amount parameter specifies the value of the transaction. The senderSignature and receiverSignature parameters specify the signature of each sender and receiver.

Additional Considerations

When using BitcoinJS to support multiple buyers and sellers, you may need to consider additional factors such as:

• Script verification flags

  

  : BitcoinJS requires that script-verify-flags be set for all transactions. You can do this by adding a scriptVerifyFlags property to the transaction object.

• Signature verification: When verifying signatures, you will need to use the same wallet and address used to sign the transaction.

Conclusion

In conclusion, BitcoinJS provides a powerful way to interact with the Bitcoin network. By following these guidelines and understanding how to work with multiple buyers and sellers, you can create secure and scalable transactions using this library.