export declare type LocalStorage = {
    getItem: (key: string) => Promise<string | null> | string | null;
    setItem: (key: string, value: string) => Promise<void> | void;
    removeItem: (key: string) => Promise<void> | void;
};
export declare type CreateKey = (encryptStr: string, ivHex: string) => Promise<PrivateKey>;
export declare type PrivateKey = {
    keyHex: string;
    keyBuffer: Uint8Array;
};
export declare type GetFn = (params: {
    lookupKey: string;
}) => Promise<{
    iv: string;
    cipherText: string;
}> | {
    iv: string;
    cipherText: string;
};
export declare type SetAuthFn = (params: {
    iv: string;
    cipherText: string;
    lookupKey: string;
}) => any | Promise<any>;
export declare type SetUserFn = (params: {
    walletAddress: string;
    username: string;
}) => any | Promise<any>;