Money Transfer Converter

The tool provides real-time money transfer planning and currency conversion for individuals and small businesses. It solves the need to estimate recipient proceeds and transfer costs before initiating an international payment. Primary users include freelancers, expatriates, travelers, and finance staff who compare rates, fees, and timing across currencies.
Core Logic & Features: It performs currency pair conversion using live exchange rates and models transfer fees by type and route. Required features include live rate fetch, amount conversion, fee estimation, net receivable calculation, and multi-currency support. Optional/advanced features include rate history, scenario comparisons, speed-based surcharges, and batch conversions.
Inputs & Outputs: Inputs include amount (numeric, base currency), source_currency (ISO code), target_currency (ISO code), transfer_type ('standard'|'express'), region (optional). Outputs include converted_amount, estimated_fees, net_receivable, rate_timestamp, and exchange_rate. Validation ensures amount > 0, currencies are supported, and rates exist; otherwise errors are indicated.
Algorithms & Calculations: Uses a live forex API to fetch the pair rate; converted_amount = amount * rate. Fees are computed as a percentage of amount plus a fixed charge per transfer_type; net_receivable = converted_amount - fees. Rate_timestamp indicates last update. If rate data is missing, a safe fallback to the most recent known rate is used.
Error & Edge Cases: Handles invalid inputs (non-numeric amount, unsupported currencies) with explicit domain-level errors. If external rate data is unavailable, it falls back to last known rate and flags a data outage condition. Large transfers trigger validation for compliance thresholds; timed-out rate fetch returns a configurable default.
Industry/Region & Localization: Adheres to ISO currency codes, 2-decimal formatting, and regional rounding rules. Prices and fees are presented in both base and target currencies; default locale is en-US; supports other locales via rate timestamps and currency formatting.
Assumptions & Exclusions: Assumes input values fall within allowed ranges and user intends a fiat transfer. It does not execute payments, store credentials, or provide tax advice. It excludes crypto, non-cash assets, and bank-specific UI flows.