@mayaprotocol/zcash-js/dist/src/script.js

Zcash JavaScript library for Maya Protocol - Build and sign Zcash transparent transactions with memo support

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.memoToScript = memoToScript;
exports.addressToScript = addressToScript;
exports.writeSigScript = writeSigScript;
const bs58check_1 = __importDefault(require("bs58check"));
const writer_1 = require("./writer");
function memoToScript(memo) {
    const opr = Buffer.alloc(memo.length + 4);
    opr[1] = 0x6a;
    let offset = 2;
    const pml = (0, writer_1.pushData)(memo.length);
    pml.copy(opr, offset);
    offset += pml.length;
    Buffer.from(memo).copy(opr, offset);
    offset += memo.length;
    opr[0] = offset - 1;
    const script = opr.subarray(0, offset);
    return script;
}
function addressToScript(address) {
    const addrb = bs58check_1.default.decode(address);
    const pkh = Buffer.alloc(20);
    Buffer.from(addrb).copy(pkh, 0, 2);
    const script = Buffer.alloc(26);
    Buffer.from('1976a914', 'hex').copy(script);
    Buffer.from(pkh).copy(script, 4);
    Buffer.from('88ac', 'hex').copy(script, 24);
    return script;
}
function writeSigScript(signature, pk) {
    const buf = Buffer.alloc(5 + signature.length + pk.length);
    let offset = 0;
    const psl = (0, writer_1.pushData)(signature.length + 1);
    psl.copy(buf, offset);
    offset += psl.length;
    Buffer.from(signature).copy(buf, offset);
    offset += signature.length;
    buf[offset] = 1;
    offset += 1;
    const pkl = (0, writer_1.pushData)(pk.length);
    pkl.copy(buf, offset);
    offset += pkl.length;
    Buffer.from(pk).copy(buf, offset);
    offset += pk.length;
    return buf.subarray(0, offset);
}