3_withdraw.js

async function withdraw() {
  console.log(chalk.green("Executing withdraw"));
  const withdrawValue = 10;
  const [, noteB] = transferNotes;
  const noteC = await note.create(alice.publicKey, splitValues[1] - withdrawValue);
  const withdrawProof = new JoinSplitProof(
    [noteB],
    [noteC],
    alice.address,
    withdrawValue,
    alice.address
  );
  const withdrawData = withdrawProof.encodeABI(contractAddresses.zkAsset);
  const withdrawSignatures = withdrawProof.constructSignatures(contractAddresses.zkAsset, [
    alice.aztecAccount
  ]);

  console.log("- executing withdraw: zkAssetSigner.confidentialTransfer()");
  await (await alice.signers.zkAsset.confidentialTransfer(
    withdrawData,
    withdrawSignatures,
    ethOptions
  )).wait();
}