export declare function getCryptoInstance(): {
    getRandomValues: (array: Uint8Array) => Uint8Array;
} | undefined;
export declare function secureRandomBytes(length: number): Uint8Array;
export declare function getEnvironmentInfo(): {
    type: 'web' | 'expo' | 'node' | 'browser-extension' | 'unknown';
    hasCrypto: boolean;
    cryptoProvider: string;
};
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