@bitgo/utxo-lib/dist/src/templates/witnesscommitment/output.js

Client-side Bitcoin JavaScript library

"use strict";
// OP_RETURN {aa21a9ed} {commitment}
Object.defineProperty(exports, "__esModule", { value: true });
exports.check = check;
exports.encode = encode;
exports.decode = decode;
const __1 = require("../../");
const __2 = require("../../");
const types = require("bitcoinjs-lib/src/types");
const typeforce = require('typeforce');
const HEADER = Buffer.from('aa21a9ed', 'hex');
function check(script) {
    const buffer = __1.script.compile(script);
    return (buffer.length > 37 && buffer[0] === __2.opcodes.OP_RETURN && buffer[1] === 0x24 && buffer.slice(2, 6).equals(HEADER));
}
check.toJSON = () => {
    return 'Witness commitment output';
};
function encode(commitment) {
    typeforce(types.Hash256bit, commitment);
    const buffer = Buffer.allocUnsafe(36);
    HEADER.copy(buffer, 0);
    commitment.copy(buffer, 4);
    return __1.script.compile([__2.opcodes.OP_RETURN, buffer]);
}
function decode(buffer) {
    typeforce(check, buffer);
    return __1.script.decompile(buffer)[1].slice(4, 36);
}
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