const MINIMUM_AMOUNT = 10; const MAXIMUM_AMOUNT = 25_000; export const amountIsValid = (amount: string) => { const value = parseInt(amount, 10); if (Number.isNaN(value)) return false; if (value < 0) return false; if (value < MINIMUM_AMOUNT) return false; if (value > MAXIMUM_AMOUNT) return false; if (value !== parseFloat(amount)) return false; // Ensure it's an integer return true; };