An Input specifies an existing output, produced by a previous transaction, to be consumed by another transaction.

An Outpoint identifies a specific output produced by a transaction.

An Output is produced by a transaction.

A Recipient specifies an address, and an amount, for which a transaction will produce an output.

The Client interface defines the functionality required to interact with a chain over RPC.

The Tx interfaces defines the functionality that must be exposed by utxo-based transactions.

The TxBuilder interface defines the functionality required to build account-based transactions.