Method isNulldata

lib/script/script.js:2005–2034

* Test whether the output script is nulldata/opreturn. * @param {Boolean} [minimal=false] - Minimaldata only. * @returns {Boolean}

(minimal)

   */

  isNulldata(minimal) {
    if (this.code.length === 0)
      return false;

    if (this.getOp(0) !== opcodes.OP_RETURN)
      return false;

    if (this.code.length === 1)
      return true;

    if (minimal) {
      if (this.raw.length > policy.MAX_OP_RETURN_BYTES)
        return false;
    }

    for (let i = 1; i < this.code.length; i++) {
      const op = this.code[i];

      if (op.value === -1)
        return false;

      if (op.value > opcodes.OP_16)
        return false;

      if (minimal && !op.isMinimal())
        return false;
    }

    return true;
  }

  /**
   * Get OP_RETURN data if present.