Request: Getter for signer address in TransactionManager interface

[androlo]

It would be great if one could get the signer address, so it doesn't have to be stored in multiple places. Getting the address works with the RawTransactionManager of course, through the credentials, but it is not possible from a ClientTransactionManager. At least not in version 2.0.2.

I guess a special accessor directly on ClientTransactionManager would work too but seems a bit clunky, since one of the main uses of the sender address is pre-conditions that guard against sending sure-to-fail transactions (e.g. transactions to permissioned contracts), and those generally depend only on the address and not the transaction method that happen to be used.

Fantastic library btw.

[conor10]

Fixed in https://github.com/web3j/web3j/releases/tag/v2.1.0.