YemenPlus — Multi-currency Ledger for an Exchange & Transfer House

YemenPlus is the operations system for a money-exchange and transfer house: it tracks customer and agent accounts with balances in several currencies, reconciles incoming and outgoing transfers, and computes commissions and network fees. At its core is a double-entry ledger. What the user types is the transaction header — type, account, counterparty, currency, amount, commission, exchange rates — while ledger lines are written by exactly one central posting path. A balance is never a stored number that can drift: it is always derived from the entries, per account and per currency. Pending transactions show precisely what posting would produce before it happens. A posted transaction is never edited or deleted. Corrections go through reversal, cancellation, duplicate-marking, or an amendment that flags the original as amended and posts a replacement — leaving a complete audit trail of every change.