NewHandleNonceBackend wraps backend and returns new instance of HandleNonceBackend.

NewSimulatedBackendExtended creates a new binding backend using a simulated blockchain for testing purposes.

HandleNonceBackend internally handles nonce of the given addresses.

SimulatedBackendExt wraps `backends.SimulatedBackend` and implements additionally `ethereum.TransactionReader` interface.

Backend contains all methods required for the backend operations.