ErrAccountDoesntExist is sent when provided sub-account is not stored in database.

ErrInvalidSendTxArgs is returned when the structure of SendTxArgs is ambigious.

ErrInvalidTxSender is returned when selected account is different than From field.

ErrUnexpectedArgs is returned when args are of unexpected length.

These structs oontain all route execution data that's stored to the DB.

SendTxArgs represents the arguments to submit a new transaction into the transaction pool.

GasCalculator provides methods for estimating and pricing gas.

PendingNonceProvider provides information about nonces.