export interface KeyPairMetadata {
    /** Hex-encoded fingerprint (SHA-256 of public key DER). */
    fingerprint: string;
    /** Responder identity associated with this key. */
    responderId: string;
    responderName: string;
    /** ISO timestamp of key creation. */
    createdAt: string;
    /** ISO timestamp when this key should no longer be used for signing. */
    expiresAt?: string;
    /** Human-readable note. */
    note?: string;
}
export interface PublicKeyRecord {
    /** Base64-encoded Ed25519 public key (DER/SPKI format). */
    publicKey: string;
    metadata: KeyPairMetadata;
}
export interface PrivateKeyRecord {
    /** Base64-encoded Ed25519 private key (PKCS8 format). */
    privateKey: string;
    /** Fingerprint linking to the corresponding public key. */
    fingerprint: string;
    responderId: string;
}
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