o

org.bitcoins.crypto

AdaptorUtil

object AdaptorUtil

Implements the ECDSA Adaptor Signing Specification: https://github.com/discreetlogcontracts/dlcspecs/blob/d01595b70269d4204b05510d19bba6a4f4fcff23/ECDSA-adaptor.md

Note that the naming is not entirely consistent between the specification and this file in hopes of making this code more readable.

The naming in this file more closely matches the naming in the secp256k1-zkp implementation: https://github.com/ElementsProject/secp256k1-zkp/tree/master/src/modules/ecdsa_adaptor

Legend: x <> privKey X <> pubKey y <> adaptorSecret Y <> adaptorPoint/adaptor messageHash <> dataToSign/data/message R_a <> untweakedNonce R <> tweakedNonce proof <> (e, s)

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  1. final def !=(arg0: Any): Boolean
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  4. def adaptorComplete(adaptorSecret: ECPrivateKey, adaptorSig: ECAdaptorSignature): ECDigitalSignature

    Implements https://github.com/discreetlogcontracts/dlcspecs/blob/d01595b70269d4204b05510d19bba6a4f4fcff23/ECDSA-adaptor.md#decryption

  5. def adaptorNonce(message: ByteVector, privKey: ECPrivateKey, adaptorPoint: ECPublicKey, algoName: String, auxRand: ByteVector): FieldElement

    Generates a secure random nonce as is done in BIP340: https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki#default-signing

  6. def adaptorSign(privateKey: ECPrivateKey, adaptorPoint: ECPublicKey, dataToSign: ByteVector, auxRand: ByteVector): ECAdaptorSignature

    Implements https://github.com/discreetlogcontracts/dlcspecs/blob/d01595b70269d4204b05510d19bba6a4f4fcff23/ECDSA-adaptor.md#encrypted-signing

  7. def adaptorVerify(adaptorSig: ECAdaptorSignature, pubKey: ECPublicKey, data: ByteVector, adaptor: ECPublicKey): Boolean

    https://github.com/discreetlogcontracts/dlcspecs/blob/d01595b70269d4204b05510d19bba6a4f4fcff23/ECDSA-adaptor.md#encryption-verification

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  12. def extractAdaptorSecret(sig: ECDigitalSignature, adaptorSig: ECAdaptorSignature, adaptor: ECPublicKey): ECPrivateKey

    Implements https://github.com/discreetlogcontracts/dlcspecs/blob/d01595b70269d4204b05510d19bba6a4f4fcff23/ECDSA-adaptor.md#key-recovery

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