/**
 * Thin CBOR decoder for Apple's App Attest attestation object.
 *
 * Apple's `DCAppAttestService.attestKey` returns a CBOR-encoded
 * attestation object with the W3C WebAuthn-compatible shape:
 *
 *   {
 *     fmt:     "apple-appattest",
 *     attStmt: { x5c: [leafDer, intermediateDer], receipt: <bytes> },
 *     authData: <bytes>
 *   }
 *
 * Delegating to `cbor2` lets us parse that without writing a full CBOR
 * implementation. We expose a typed `parseAppAttestCbor` so the verifier
 * never touches raw `unknown` shapes — every field is validated as it's
 * lifted out.
 */
export interface AppAttestCbor {
    readonly fmt: string;
    readonly x5c: readonly Uint8Array[];
    readonly receipt: Uint8Array | null;
    readonly authData: Uint8Array;
}
/**
 * Parse a CBOR-encoded App Attest attestation object.
 *
 * Returns a typed view or throws on malformed / unexpected shape. The
 * caller (`verify.ts`) catches the throw and converts to the
 * `{ valid: false, errors: [...] }` result shape.
 */
export declare function parseAppAttestCbor(attestationObjectBytes: Uint8Array): AppAttestCbor;
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