export declare const expoSecureEnvironment: {
    generateKeypair: (keyId: string, biometricsBacked?: boolean) => Uint8Array;
    batchGenerateKeyPair: (keyIds: Array<string>) => Record<string, Uint8Array>;
    getPublicBytesForKeyId: (keyId: string) => Uint8Array;
    sign: (keyId: string, message: Uint8Array, biometricsBacked?: boolean) => Promise<Uint8Array>;
    supportsSecureEnvironment: () => boolean;
    deleteKey: (keyId: string) => void;
};
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