Function buildNoteScriptV2

src/note.ts:37–72

(
  xOnlyPubkey: Buffer,
  hasPayload: boolean = true,
  msgpackEncodedData?: Buffer
)

// Construct locking script with embedded data placed after the NOTE identifier, split into 520-byte segments, data is msgpack encoded
export function buildNoteScriptV2(
  xOnlyPubkey: Buffer,
  hasPayload: boolean = true,
  msgpackEncodedData?: Buffer
): string {
  // Complete data format
  // data0,data1,data2,data3,data4 NOTE OP_FALSE OP_IF data<520bytes> ... OP_ENDIF OP_2DROP OP_2DROP OP_2DROP xOnlyPubkey OP_CHECKSIG

  // Protocol tag 4e4f5445 -> NOTE
  let scriptASM = `${Buffer.from(NOTE_PROTOCOL_ENVELOPE_ID, "utf8").toString(
    "hex"
  )}`;
  // If there's a data section, split it into 520-byte segments
  if (msgpackEncodedData) {
    scriptASM += ` OP_FALSE OP_IF`;
    // Split data into 520-byte segments, up to 100K in total
    const dataList = splitBufferIntoSegments(
      msgpackEncodedData,
      MAX_SCRIPT_ELEMENT_SIZE,
      MAX_DATA_SEGMENTS_LIMIT
    );
    for (let i = 0; i < dataList.length; i++) {
      scriptASM += ` ${dataList[i]!.toString("hex")}`;
    }
    scriptASM += ` OP_ENDIF`;
  }
  // If there's a payload, add 2DROP to remove the data section of the unlock script
  if (hasPayload) {
    scriptASM += ` OP_2DROP OP_2DROP OP_2DROP`;
  } else {
    // If there's no payload, remove the NOTE identifier
    scriptASM += ` OP_DROP`;
  }
  scriptASM += ` ${xOnlyPubkey.toString("hex")} OP_CHECKSIG`;
  return scriptASM;
}

// Test code: Construct unlock script with embedded data placed after the NOTE identifier, split into 520-byte segments, data is msgpack encoded
export function buildNoteUnlockScriptV2(