Introduce interfaces Signing Provider/BaseSignatureCreator #2837
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This PR is the start of the road to implementing BIP-174
In order to integrate PSBT, we have several necessary prerequisites that include this PR.
CKeyStoreclass has more than the majority of what the sign functions will use/need, so changing to providing only keys and scripts.CKeyStoreis no longer the interface that signing relies on, thus swapping the dependency around whereCKeyStorenow relies onSigningProvider.Next, we changed
DummySignatureCreatorto a stateless objectDUMMY_SIGNATURE_CREATOR.BaseSignatureCreatoris now its own interface and can now implement new derivations for signing with it. Alongside this now provides transaction-specific logic and/or other signing logic.Lastly, this PR refactored
TransactionSignatureCreatorinto a templatedGenericTransactionSignatureCreatorthat works with bothCMutableTransactionandCTransaction. Which speeds up the resolution in our Unit testing.Backports for reference:
bitcoin#12714
bitcoin#12803
bitcoin#13309