Partner interface

interface RampPartner {
  readonly id: string;
  readonly payoutCurrencies: readonly Fiat[];
  readonly collectionCurrencies: readonly Fiat[];
  readonly chains: readonly ("SOLANA" | "BASE")[];

  rates(currency: Fiat): Promise<Rates>;
  openPayout(req: PayoutRequest): Promise<PartnerOrder>;          // offramp
  openCollection(req: CollectionRequest): Promise<PartnerOrder>;  // onramp
  getOrder(id: string): Promise<PartnerOrder>;

  verifyWebhook(rawBody: string, headers: Record<string, string | undefined>, now?: Date): boolean;
  parseWebhook(rawBody: string): PartnerOrder;
}