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@covenance/dlc

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Crypto and Bitcoin functions for Covenance DLC implementation

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import { Point } from './secp256k1'; import { PrivKey, PubKey, Signature, AdaptorSignature, Sighash } from './types'; /** * Counterparty function to create an adaptor signature for a specific event outcome * @param counterpartyPrivKey - Counterparty's private key * @param oracleSigPoint - Oracle's signature point for the event outcome * @param cetSighash - Sighash of the event outcome CET * @returns Counterparty's adaptor signature */ export declare function createAdaptorSig(counterpartyPrivKey: PrivKey, oracleSigPoint: Point, cetSighash: Sighash, tag?: Uint8Array): Promise<AdaptorSignature>; /** * Counterparty function to adapt (finalize) an adaptor signature * @param adaptorSig - The adaptor signature to finalize * @param s - The oracle's scalar value (s) from their signature or repayment secret * @returns The final signature */ export declare function adaptSig(adaptorSig: AdaptorSignature, s: bigint): Signature; /** * Function to verify an adaptor signature * @param adaptorSig - The adaptor signature to verify * @param counterpartyPubKey - The counterparty's public key * @param cetSighash - The sighash of the event outcome CET * @param oracleSigPoint - The oracle's signature point for the event outcome * @returns Boolean indicating whether the adaptor signature is valid */ export declare function verifyAdaptorSig(adaptorSig: AdaptorSignature, counterpartyPubKey: PubKey, cetSighash: Sighash, oracleSigPoint: Point, tag?: Uint8Array): Promise<boolean>; /** * Function to generate a private key which produces a public key with even y. * This is to avoid doing BIP-340 secret-key parity adjustment (flip if public key has odd Y) each time an adaptor signature is created. * @returns A private key which produces a public key with even y. */ export declare function generateEvenYPrivateKey(): PrivKey;