Function createP2TRNotePsbt

src/btc/btc-p2tr-note.ts:70–134

(
  privateKey: ECPairInterface,
  notePayload: NotePayload,
  noteUtxos: IUtxo[],
  payUtxos: IUtxo[],
  toAddresses: ISendToAddress[],
  change: string,
  network: bitcoin.Network,
  fee: number = 1000,
  locktime?: number
)

 * in Partially Signed Bitcoin Transaction (PSBT) format.
 */
export function createP2TRNotePsbt(
  privateKey: ECPairInterface,
  notePayload: NotePayload,
  noteUtxos: IUtxo[],
  payUtxos: IUtxo[],
  toAddresses: ISendToAddress[],
  change: string,
  network: bitcoin.Network,
  fee: number = 1000,
  locktime?: number
) {
  const psbt = new bitcoin.Psbt({network});
  psbt.setVersion(2);
  psbt.setLocktime(locktime ?? 0);

  const p2note = generateP2TRNoteInfo(privateKey.publicKey, network);
  const tapLeafNoteScript = createTapLeafScript(
    p2note.noteRedeem,
    p2note.noteP2TR
  );
  const tapLeafP2PKScript = createTapLeafScript(
    p2note.p2pkRedeem,
    p2note.p2pkP2TR
  );

  let totalInput = 0;

  // Add NOTE input
  totalInput += addNoteInput(
    psbt,
    noteUtxos[0]!,
    p2note.noteP2TR,
    tapLeafNoteScript
  );

  // Add other note inputs
  for (let i = 1; i < noteUtxos.length; i++) {
    totalInput += addNoteInput(
      psbt,
      noteUtxos[i]!,
      p2note.p2pkP2TR,
      tapLeafP2PKScript
    );
  }

  // Add pay inputs
  totalInput += addPsbtPayUtxos(privateKey, psbt, payUtxos, network);

  // Add outputs
  const totalOutput = addOutputs(psbt, toAddresses);

  // Add change output
  addChangeOutput(psbt, totalInput, totalOutput, fee, change);

  // Sign inputs
  signInputs(psbt, noteUtxos, payUtxos, privateKey, network);

  // Finalize inputs