export declare function isSubtleCryptoAvailable(): boolean;
export declare function isNodeCryptoAvailable<T>(withFeature: (nodeCrypto: typeof import('crypto')) => boolean | T): false | T;
export declare const NO_CRYPTO_LIB = "Crypto lib not found. Either the WebCrypto \"crypto.subtle\" or Node.js \"crypto\" module must be available.";
export interface WebCryptoLib {
    lib: SubtleCrypto;
    name: 'subtleCrypto';
}
export interface NodeCryptoLib {
    lib: typeof import('crypto');
    name: 'nodeCrypto';
}
export declare function getCryptoLib(): Promise<WebCryptoLib | NodeCryptoLib>;