Replace ad-hoc if/elif branches with a unified approach:
1. Read txn_currency from the transaction data
2. Convert amount → company currency via txn_rate
3. Derive each account's amount in its own currency
4. Recompute exact exchange rates from rounded amounts
to keep Frappe's debit == credit in company currency
Fixes the bug where a $40 debit was recorded as ~$25 debit
and 40 AZN credit due to dividing instead of multiplying
when the transaction currency matched the foreign account.
Applies to both bank_api.py (_import_one_transaction JE path)
and mapping.py (_create_journal_entry_for_brt).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
For Receive transactions, paid_to (bank account) should be debited
and paid_from (income/receivable account) should be credited.
The logic was inverted in both bank_api.py and mapping.py.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Ali