At the ABI level there's a distinction between an empty byte array, null, and void as a return type. null will be converted to an object type of NULL. Return type of void should be converted to an empty byte array so that it can be decoded if necessary. This is in the case of a successful transaction execution.
If the transaction fails, the returned data will be null indicating execution failure.
At the ABI level there's a distinction between an empty byte array, null, and void as a return type. null will be converted to an object type of
NULL. Return type ofvoidshould be converted to an empty byte array so that it can be decoded if necessary. This is in the case of a successful transaction execution.If the transaction fails, the returned data will be null indicating execution failure.