Module adaptor_sig 

Adaptor signatures — pre-signature + completion with witness.

An adaptor signature is a “pre-signature” that can be completed into a valid signature by anyone who knows a secret witness y. Revealing the completed signature also reveals y, enabling atomic swaps and payment channels.

Structs

AdaptorPreSig

An adaptor pre-signature.

WitnessStatement

A witness statement: Y = y * G.

Functions

complete

Complete an adaptor pre-signature using the witness y. Produces a valid ECDSA signature.

create_witness

Generate a witness statement from a secret witness.

extract_witness

Extract the witness y from a completed signature and pre-signature. Anyone who sees both can recover y.

pre_sign

Create an adaptor pre-signature. The signer signs with nonce k but publishes R’ = (k + y) * G.

verify_pre_sig

Verify an adaptor pre-signature.