Buffer.equals() requires Buffer, not Uint8Array

[a-khushal]

The following comparison fails when toXOnly() returns a Buffer and outputKey is a Uint8Array:

Even if both values contain the same underlying bytes, .equals() does not accept Uint8Array arguments directly.

Using Buffer.from(outputKey) works as expected:

if ((0, bip371_1.toXOnly)(pubkey).equals(Buffer.from(outputKey))) {
  // works
}

Version
6.1.5

Expected behavior
outputKey must be a Buffer when used with .equals(). Currently, it’s an Uint8Array.

[a-khushal]

I did investigated the issue further to find that in getPrevoutTaprootKey of the psbt.js, the code uses .subarray(2, 34) on a Buffer. The problem is that Buffer.subarray() returns a Uint8Array view, not a Buffer.

This happens because Node.js defines:
Buffer.slice() --> returns a Buffer
Buffer.subarray() --> returns a Uint8Array

Fix: change to .slice(2, 34) to keep the return type consistent (Buffer).