import * as mongodb from 'mongodb';
export declare class CleanFiatRates {
    db: mongodb.Db;
    client: mongodb.MongoClient;
    from: Date;
    to: Date;
    constructor();
    run(cb: any): any;
    cleanFiatRates(cb: any): void;
    _getDatesToKeep(cb: any): Promise<void>;
    _cleanFiatRates(datesToKeep: any, cb: any): Promise<any>;
}
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