P256K.Schnorr

BIP-340 Schnorr signatures over secp256k1: sign with P256K.Schnorr.PrivateKey, verify against P256K.Schnorr.XonlyKey, using a fixed 64-byte P256K.Schnorr.SchnorrSignature encoding.

iOS 13.0+
macCatalyst 13.0+
macOS 10.15+
tvOS 13.0+
visionOS 1.0+
watchOS 6.0+

enum Schnorr

Overview

All signing operations use secp256k1_schnorrsig_sign_custom with secp256k1_nonce_function_bip340. Verification uses secp256k1_schnorrsig_verify against the 32-byte x-only public key, not the full compressed key.

Topics

Structures

struct Nonce
Represents a public nonce used for MuSig operations.
struct PartialSignature
36-byte MuSig2 partial signature produced by one signer via partialSignature(for:pubnonce:secureNonce:publicNonceAggregate:xonlyKeyAggregate:); combined with all others by aggregateSignatures(_:).
struct PrivateKey
secp256k1 BIP-340 Schnorr private key for signing messages with P256K.Schnorr.SchnorrSignature and for deriving the x-only public key used in verification.
struct PublicKey
secp256k1 BIP-340 Schnorr public key in compressed or uncompressed form, from which the x-only key used for signature verification is derived via the xonly property.
struct SchnorrSignature
64-byte BIP-340 Schnorr signature over the secp256k1 elliptic curve, produced by secp256k1_schnorrsig_sign_custom and verified by secp256k1_schnorrsig_verify.
struct SecureNonce
Represents a secure nonce used for MuSig operations.
struct XonlyKey
The corresponding x-only public key for the secp256k1 curve.

Type Properties

static let publicNonceByteCount: Int
The byte length of a serialized public nonce.