type ISO4217 = "SOS" | "USD" | "EUR" | "GBP" | "KES" | "ETB" | "AED" | "SAR" | "TRY" | "CNY";
type RateTable = Record<ISO4217, number>;
interface Provider {
    /** Return a table where keys are currency codes and values are the rate for 1 SOS in that currency. */
    fetchRatesSOS(): Promise<RateTable>;
    name: string;
}
interface CacheOptions {
    /** How long to keep cache before a refresh is allowed (ms). Default 6 hours. */
    ttlMs?: number;
    /** Optional path to persist JSON cache (e.g., ~/.sosx/cache.json). If omitted, in-memory only. */
    persistPath?: string;
}
interface GetRateOptions extends CacheOptions {
    /** Inject a custom provider. Default: exchangerate.host adapter. */
    provider?: Provider;
    /** If true, skip network and use cache/seed. */
    offline?: boolean;
}

/** Load rates (1 SOS in currency X), honoring cache/ttl/offline. */
declare function getRates(options?: GetRateOptions): Promise<RateTable>;
/** Get single rate: 1 SOS in target currency. */
declare function getRate(target: ISO4217, options?: GetRateOptions): Promise<number>;
/** Convert amount between any two currencies using SOS as pivot. */
declare function convert(amount: number, from: ISO4217, to: ISO4217, options?: GetRateOptions): Promise<number>;
/** Format a number in Somali Shillings (Sh.). */
declare function formatSOS(value: number): string;
/** Format any ISO currency in Somali locale. */
declare function formatCurrency(value: number, currency: ISO4217): string;
/** Convenience helper: get compact string like '100 USD = Sh. 5,700,000' */
declare function quote(from: ISO4217, to: ISO4217, amount?: number, options?: GetRateOptions): Promise<string>;

export { type CacheOptions, type GetRateOptions, type ISO4217, type Provider, type RateTable, convert, formatCurrency, formatSOS, getRate, getRates, quote };