CallArgs contains parameters for contract calls.

PrivateArgs are transaction arguments to provide to an Ethereum client supporting privacy (such as Quorum).

Progress holds information about listener progress.

SendTxArgs are arguments to provide to jsonRPC call `eth_sendTransaction`.

TxListenerBlock contains data about a block.

TxListenerError is what is provided to the user when an error occurs.

TxListenerReceipt contains useful information about a receipt.

TxListenerErrors is a type that wraps a batch of errors and implements the Error interface.