import type { FiatCurrencyCode, FiatExchangeRates } from '../sdk/WalletServices.interfaces';
export declare const MAX_FIAT_RATE = 1000000000000000;
export declare const MAX_FIAT_RESPONSE_RATES = 256;
export declare const MAX_FIAT_FUTURE_SKEW_MS: number;
export declare function normalizeFiatCurrency(value: unknown, name?: string): FiatCurrencyCode;
export declare function normalizeFiatCurrencies(value: unknown, extras?: readonly FiatCurrencyCode[]): FiatCurrencyCode[];
export declare function normalizeFiatRate(value: unknown, currency: string): number;
export declare function isValidFiatRate(value: unknown): value is number;
export declare function normalizeFiatTimestamp(value: unknown, now?: number): Date;
export declare function normalizeFiatExchangeRates(value: unknown, required: readonly FiatCurrencyCode[], now?: number): FiatExchangeRates;
export declare function normalizeFiatRateTimestamps(value: unknown, now?: number): Record<string, Date> | undefined;
//# sourceMappingURL=fiatRateValidation.d.ts.map