Method isProgram

lib/script/script.js:2088–2101

* Test whether the output script is a witness program. * Note that this will return true even for malformed * witness v0 programs. * @return {Boolean}

()

   */

  isProgram() {
    if (this.raw.length < 4 || this.raw.length > 42)
      return false;

    if (this.raw[0] !== opcodes.OP_0
        && (this.raw[0] < opcodes.OP_1 || this.raw[0] > opcodes.OP_16)) {
      return false;
    }

    if (this.raw[1] + 2 !== this.raw.length)
      return false;

    return true;
  }

  /**
   * Get the witness program if present.