/**
 * These changes are made in this way so the interface does not change.
 * It would be good to change this down the line and credo-ts gets a rework on
 * the crypto interfaces.
 *
 */
export interface SecureEnvironment {
    generateKeypair(keyId: string, biometricsBacked?: boolean): Promise<Uint8Array> | Uint8Array;
    /**
     *
     * @todo Might be better to make this optional
     *
     * Returns an object where each key is the `keyId` and the value is the public key bytes
     *
     */
    batchGenerateKeyPair(keyIds: Array<string>, biometricsBacked?: boolean): Promise<Record<string, Uint8Array>> | Record<string, Uint8Array>;
    getPublicBytesForKeyId(keyId: string): Promise<Uint8Array> | Uint8Array;
    sign(keyId: string, message: Uint8Array, biometricsBacked?: boolean): Promise<Uint8Array>;
    deleteKey(keyId: string): Promise<void> | void;
}
export declare let isExpoSecureEnvironmentSupported: boolean;
export declare const setFallbackSecureEnvironment: (env: SecureEnvironment) => void;
export declare const getSecureEnvironment: () => SecureEnvironment;
export declare const shouldUseFallbackSecureEnvironment: (useFallback: boolean) => void;
export declare const isLocalSecureEnvironmentSupported: () => boolean;
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