Method fromProgram

lib/script/script.js:1587–1603

* Inject properties from a witness program. * @private * @param {Number} version * @param {Buffer} data

(version, data)

   */

  fromProgram(version, data) {
    assert((version & 0xff) === version && version >= 0 && version <= 16);
    assert(Buffer.isBuffer(data) && data.length >= 2 && data.length <= 40);

    this.raw = Buffer.allocUnsafe(2 + data.length);
    this.raw[0] = version === 0 ? 0 : version + 0x50;
    this.raw[1] = data.length;
    data.copy(this.raw, 2);

    data = this.raw.slice(2, 2 + data.length);

    this.code.length = 0;
    this.code.push(Opcode.fromSmall(version));
    this.code.push(Opcode.fromPush(data));

    return this;
  }

  /**
   * Create a witness program.