/** Identifies the app whose assertions are being verified. */
export interface AssertionAppInfo {
    /** Apple App ID in the format `TEAMID.bundleId`. */
    appId: string;
}
/**
 * @deprecated Use {@linkcode AssertionAppInfo}. This alias exists because
 * the attestation entry points export a different `AppInfo` shape (with
 * `developmentEnv`); the distinct name removes the ambiguity.
 */
export type AppInfo = AssertionAppInfo;
/** Successful assertion verification result. */
export interface AssertionResult {
    /** Updated sign count to persist for the next assertion. */
    signCount: number;
}
/**
 * Verify an Apple App Attest assertion.
 *
 * Validates the CBOR-encoded assertion against the expected app ID,
 * checks the monotonic sign counter, and verifies the ECDSA signature
 * using the device's public key.
 *
 * @throws {AssertionError} If any verification step fails.
 */
export declare function verifyAssertion(appInfo: AssertionAppInfo, assertion: Uint8Array | string, clientData: Uint8Array | string, publicKeyPem: string, previousSignCount: number): Promise<AssertionResult>;