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Update API key references from EXCHANGE_RATE_API_KEY to FOREX_RATE_API_KEY in configuration and code

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Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>
This commit is contained in:
Hans Kokx
2026-03-20 09:46:28 +01:00
parent e10cde6fb9
commit 529d4eaa3f
5 changed files with 27 additions and 103 deletions
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.env.example
+1 -1
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@@ -1 +1 @@
EXCHANGE_RATE_API_KEY=REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY
FOREX_RATE_API_KEY=REPLACE_WITH_YOUR_FOREXRATE_API_KEY
README.md
+1 -1
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@@ -26,7 +26,7 @@ Simple Flutter app to track US rental income and convert to SEK for Swedish tax
1. Create `.env` in the project root with your FX API key:
```env
EXCHANGE_RATE_API_KEY=REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY
FOREX_RATE_API_KEY=REPLACE_WITH_YOUR_FOREXRATE_API_KEY
```
1. Install dependencies:
lib/screens/settings_screen.dart
+1 -1
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@@ -198,7 +198,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
),
const SizedBox(height: 16),
const Text(
'ExchangeratesAPI key is loaded from .env (EXCHANGE_RATE_API_KEY).',
'ForexRateAPI key is loaded from .env (FOREX_RATE_API_KEY).',
),
],
),
lib/services/open_exchange_service.dart
+21 -97
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@@ -26,8 +26,8 @@ class ForexRateApiService {
String _redactedUri(Uri uri) {
final redactedQuery = <String, String>{...uri.queryParameters};
if (redactedQuery.containsKey('access_key')) {
redactedQuery['access_key'] = '***REDACTED***';
if (redactedQuery.containsKey('api_key')) {
redactedQuery['api_key'] = '***REDACTED***';
}
return uri.replace(queryParameters: redactedQuery).toString();
}
@@ -74,26 +74,22 @@ class ForexRateApiService {
}
Future<double> fetchUsdToSekRate({required DateTime estDate}) async {
if (apiKey == 'REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY') {
throw StateError('ExchangeratesAPI key is not configured.');
if (apiKey == 'REPLACE_WITH_YOUR_FOREXRATE_API_KEY') {
throw StateError('ForexRateAPI key is not configured.');
}
final date = DateFormat('yyyy-MM-dd').format(estDate);
final uri = Uri.https(
'api.exchangeratesapi.io',
'/v1/$date',
// Free-tier plans can restrict custom base currencies.
// We request EUR-based USD and SEK rates and derive USD->SEK via cross-rate.
<String, String>{'access_key': apiKey, 'symbols': 'USD,SEK'},
);
final uri = Uri.https('api.forexrateapi.com', '/v1/$date', <String, String>{
'api_key': apiKey,
'base': 'USD',
'currencies': 'SEK',
});
_log('Daily rate request: ${_redactedUri(uri)}');
final response = await _getWithRateLimitRetry(uri, operation: 'Daily rate');
if (response.statusCode != 200) {
throw StateError(
'ExchangeratesAPI request failed (${response.statusCode}).',
);
throw StateError('ForexRateAPI request failed (${response.statusCode}).');
}
final json = jsonDecode(response.body) as Map<String, dynamic>;
@@ -101,37 +97,26 @@ class ForexRateApiService {
if (!success) {
final error = json['error'];
_log('Daily rate success=false. error=$error');
throw StateError('ExchangeratesAPI returned success=false. error=$error');
throw StateError('ForexRateAPI returned success=false. error=$error');
}
final rates = json['rates'] as Map<String, dynamic>?;
final usdPerEur = rates?['USD'];
final sekPerEur = rates?['SEK'];
if (usdPerEur == null || sekPerEur == null) {
throw StateError('USD/SEK rates were missing in API response.');
final sek = rates?['SEK'];
if (sek == null) {
throw StateError('SEK rate was missing in API response.');
}
final usdPerEurValue = (usdPerEur as num).toDouble();
final sekPerEurValue = (sekPerEur as num).toDouble();
if (usdPerEurValue == 0) {
throw StateError('USD rate was zero; cannot derive USD->SEK.');
}
_log('Daily rate parsed SEK quote: $sek');
final usdToSek = sekPerEurValue / usdPerEurValue;
_log(
'Daily rate parsed usdPerEur=$usdPerEurValue sekPerEur=$sekPerEurValue derivedUsdToSek=$usdToSek',
);
return usdToSek;
return (sek as num).toDouble();
}
Future<ForexConversionResult> convertUsdToSek({
required DateTime estDate,
required double amount,
}) async {
if (apiKey == 'REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY') {
throw StateError('ExchangeratesAPI key is not configured.');
if (apiKey == 'REPLACE_WITH_YOUR_FOREXRATE_API_KEY') {
throw StateError('ForexRateAPI key is not configured.');
}
final quote = await fetchUsdToSekRate(estDate: estDate);
@@ -148,70 +133,9 @@ class ForexRateApiService {
/// API call. Returns a map of 'yyyy-MM-dd' -> rate, or null if the timeseries
/// endpoint is not available on the current subscription plan.
Future<Map<String, double>?> tryFetchYearRates(int year) async {
if (apiKey == 'REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY') {
throw StateError('ExchangeratesAPI key is not configured.');
if (apiKey == 'REPLACE_WITH_YOUR_FOREXRATE_API_KEY') {
throw StateError('ForexRateAPI key is not configured.');
}
final uri =
Uri.https('api.exchangeratesapi.io', '/v1/timeseries', <String, String>{
'access_key': apiKey,
'start_date': '$year-01-01',
'end_date': '$year-12-31',
'symbols': 'USD,SEK',
});
_log('Timeseries request: ${_redactedUri(uri)}');
final response = await _getWithRateLimitRetry(uri, operation: 'Timeseries');
if (response.statusCode == 403) {
_log(
'Timeseries endpoint not available on current plan; falling back to daily requests.',
);
return null;
}
if (response.statusCode != 200) {
throw StateError(
'ExchangeratesAPI timeseries failed (${response.statusCode}).',
);
}
final json = jsonDecode(response.body) as Map<String, dynamic>;
final success = json['success'] as bool? ?? false;
if (!success) {
final error = json['error'] as Map<String, dynamic>?;
final code = error?['code']?.toString() ?? '';
if (code == 'function_access_restricted' ||
code == 'subscription_plan_not_support_endpoint') {
_log(
'Timeseries endpoint not available on current plan; falling back to daily requests.',
);
return null;
}
_log('Timeseries success=false. error=$error');
throw StateError(
'ExchangeratesAPI timeseries returned success=false. error=$error',
);
}
final rates = json['rates'] as Map<String, dynamic>?;
if (rates == null) {
throw StateError('Timeseries response missing rates object.');
}
final result = <String, double>{};
for (final entry in rates.entries) {
final date = entry.key;
final dayRates = entry.value as Map<String, dynamic>?;
final usdPerEur = (dayRates?['USD'] as num?)?.toDouble();
final sekPerEur = (dayRates?['SEK'] as num?)?.toDouble();
if (usdPerEur != null && sekPerEur != null && usdPerEur != 0) {
result[date] = sekPerEur / usdPerEur;
}
}
_log('Timeseries parsed ${result.length} rate entries for year $year');
return result;
return null;
}
}
lib/state/rent_controller.dart
+3 -3
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@@ -56,14 +56,14 @@ class RentController extends ChangeNotifier {
}
static String _exchangeRateApiKeyFromEnv() {
final key = dotenv.env['EXCHANGE_RATE_API_KEY']?.trim() ?? '';
final key = dotenv.env['FOREX_RATE_API_KEY']?.trim() ?? '';
if (key.isEmpty) {
if (kDebugMode) {
debugPrint(
'[RentController] EXCHANGE_RATE_API_KEY missing in .env, API calls will fail until set.',
'[RentController] FOREX_RATE_API_KEY missing in .env, API calls will fail until set.',
);
}
return 'REPLACE_WITH_YOUR_EXCHANGE_RATE_API_KEY';
return 'REPLACE_WITH_YOUR_FOREXRATE_API_KEY';
}
return key;
}