Finished feature to convert bought currency with exchange rate

apps/api/src/app/import/import.service.ts

@@ -248,7 +248,7 @@ export class ImportService {
 
     const activities: Activity[] = [];
 
-    for (const {
+    for (let {
       accountId,
       comment,
       date,
@@ -296,6 +296,28 @@ export class ImportService {
             Account?: { id: string; name: string };
           });
 
+      if (SymbolProfile.currency !== assetProfile.currency) {
+        // We convert the unit price and fee to the asset currency if the transaction is in different currency.
+        unitPrice = await this.exchangeRateDataService.toCurrencyAtDate(
+          unitPrice,
+          SymbolProfile.currency,
+          assetProfile.currency,
+          date
+        );
+        if (unitPrice === undefined) {
+          throw new Error(
+            `No currency conversion from ${SymbolProfile.currency} to ${assetProfile.currency} for ${SymbolProfile.symbol} at ${date}`
+          );
+        }
+
+        fee = await this.exchangeRateDataService.toCurrencyAtDate(
+          fee,
+          SymbolProfile.currency,
+          assetProfile.currency,
+          date
+        );
+      }
+
       if (isDryRun) {
         order = {
           comment,
@@ -539,9 +561,16 @@ export class ImportService {
           );
         }
 
-        if (assetProfile.currency !== currency) {
+        if (
+          assetProfile.currency !== currency &&
+          !this.exchangeRateDataService.isCurrencyPairSupported(
+            // We check if we can convert the currency bought in to currency of asset
+            currency,
+            assetProfile.currency
+          )
+        ) {
           throw new Error(
-            `activities.${index}.currency ("${currency}") does not match with "${assetProfile.currency}"`
+            `activities.${index}.currency ("${currency}") does not match with "${assetProfile.currency} and no exchange rate is available from "${currency}" to "${assetProfile.currency}"`
           );
         }
 

apps/api/src/services/exchange-rate-data/exchange-rate-data.service.ts

@@ -33,6 +33,16 @@ export class ExchangeRateDataService {
     return this.currencyPairs;
   }
 
+  public isCurrencyPairSupported(
+    firstCurrency: string,
+    secondCurrency: string
+  ) {
+    return (
+      this.getCurrencies().includes(firstCurrency) &&
+      this.getCurrencies().includes(secondCurrency)
+    );
+  }
+
   public async initialize() {
     this.baseCurrency = this.configurationService.get('BASE_CURRENCY');
     this.currencies = await this.prepareCurrencies();