P256K.Recovery.ECDSACompactSignature

A 64-byte compact ECDSA signature paired with its 1-byte recovery ID, as produced by secp256k1_ecdsa_recoverable_signature_serialize_compact (declared in Vendor/secp256k1/include/secp256k1_recovery.h).

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

struct ECDSACompactSignature

Overview

This is the canonical wire format for Bitcoin signed-message payloads (BIP-137, BIP-322): 64 bytes of ECDSA compact signature plus 1 separate byte for the recovery ID.

Topics

Fields

let signature: Data
The 64-byte compact ECDSA signature (r || s, big-endian).
let recoveryId: Int32
The recovery ID (0–3) that identifies which of the possible public keys corresponds to the signer.