Installation

Magic interacts with the Bitcoin blockchain via Magic's extension NPM package @magic-ext/bitcoin. The Bitcoin extension also lets you interact with the blockchain using methods from Bitcoinjs-lib.

NPM

 Copy
npm install --save @magic-ext/bitcoin

Yarn

 Copy
yarn add @magic-ext/bitcoin

Initializing Extension

ES Modules/TypeScript

 Copy
import { Magic } from 'magic-sdk';
import { BitcoinExtension } from "@magic-ext/bitcoin";

const magic = new Magic('YOUR_API_KEY', {
  extensions: [
    new BitcoinExtension({
      rpcUrl: 'BTC_RPC_NODE_URL',
      network: 'testnet' // testnet or mainnet
    }),
  ],
});

Call signTransaction Extension Method

To send a standard Bitcoin blockchain transaction, you can call the magic.bitcoin.signTransaction method to get the signature and raw transaction then send to blockchain by yourself.

ES Modules/TypeScript

 Copy
import { Magic } from 'magic-sdk';
import { BitcoinExtension } from "@magic-ext/bitcoin";
import * as bitcoin from 'bitcoinjs-lib'

const magic = new Magic('YOUR_API_KEY', {
  extensions: [
    new BitcoinExtension({
      rpcUrl: 'BTC_RPC_NODE_URL',
      network: 'testnet' // testnet or mainnet
    }),
  ],
});

const TESTNET = bitcoin.networks.testnet;

const tx = new bitcoin.TransactionBuilder(TESTNET);
tx.addInput('fde789dad13b52e33229baed29b11d3e6f6dd306eb159865957dce13219bf85c', 0);

tx.addOutput('mfkv2a593E1TfDVFmf1szjAkyihLowyBaT', 80000);

const txHex = tx.buildIncomplete().toHex();

const signedTransactionHex = await magic.bitcoin.signTransaction(txHex, 0);

console.log("signed transaction", signedTransactionHex);