Better error message on transfer to smart contract

[kroggen]

When making a simple transfer to a smart contract by using a transaction of type TRANSFER:

The transfer fails (as expected) if the contract does not have a payable and default function.

But the error message is strange as the engine treats the transaction of type TRANSFER as a transaction of type CALL:

https://testnet.aergoscan.io/transaction/Fu7eCFB6BnA7xKtuhYjtGkHfzBfZUah7p7iCeCpeqbXs?receipt=json&payload=formatted

"result": "not found function: "

Proposal

If the transaction is of type TRANSFER then the engine:

• Could return a proper error message, like "the contract does not have a default payable function"
• Could ignore the payload (maybe)