TealScript - arc4 Transaction parameter either Pay or Asset transfer

Question

is it possible to have multiple types of incomming transactions as arc4 parameter for the method?

  addLiquidity(
    aXfer: AssetTransferTxn | PayTxn,
    bXfer: AssetTransferTxn | PayTxn,
    poolAsset: AssetID,
    aAsset: AssetID,
    bAsset: AssetID
  ): void {

What is the best way to check if the transaction is asset transfer or pay tx?

Answer 1

I would use the more general type Txn and then check whether it is an AssetTransferTxn or a PayTxn within the method.

  addLiquidity(
    aXfer: Txn,
    bXfer: Txn,
    poolAsset: AssetID,
    aAsset: AssetID,
    bAsset: AssetID
  ): void {