tx offset is needed for requesting tx sign?

[serendipity-seeker]

await window.ethereum.request({
      method: 'wallet_invokeSnap',
      params: {
        snapId: defaultSnapOrigin,
        request: {
          method: 'signTransaction',
          params: {
            base64Tx,
            accountIdx,
            offset,
          },
        },
      },
    });

when requesting sign tx, we need to pass offset.
I am not sure it is needed.
In tx, signature part is last 64 byte, so we can just eliminate last 64 byte from passed transaction and just sign it - it will be okay.

qubic-mm-snap/src/index.js

Line 38 in c12b1ea

const { base64Tx, offset, accountIdx = 0, confirm = true } = request.params || {}