This trait is responsible for converting RawTxBuilderResults into finalized (unsigned) transactions. This process usually includes such things as computation on inputs and outputs to generate things like change outputs, or to reorder inputs or outputs.

Once a transaction is done being finalized, its txid/wtxid should not change as the RawTxSigner's only responsibility is adding signature data not included in the txid/wtxid.

RawTxFinalizer may (but is not required to) generate witness data other than signatures (i.e. public keys for P2WPKH and redeem scripts for P2WSH). RawTxFinalizer may not otherwise populate any other kind of script signature or witness data.

RawTxFinalizers are compose-able through the andThen method which will turn the first RawTxFinalizer's finalized transaction into a RawTxBuilderResult by taking that transactions inputs (in order), outputs (in order), locktime and version and this RawTxBuilderResult is then given to the second RawTxFinalizer.