Feature/add manual exchange rate to activity

* Add optional exchangeRate to Order (asset profile currency to base currency)
* Apply it to the cost basis, fees, dividends, interest and liabilities at the activity date
* Add exchange rate input to the create or update activity dialog
* Pass it through import and export
* Add toCurrencyAtDateWithExchangeRate to ExchangeRateDataService

apps/api/src/app/activities/activities.service.spec.ts

@@ -83,7 +83,8 @@ describe('ActivitiesService', () => {
         null,
         null,
         {
-          toCurrencyAtDate: jest.fn().mockResolvedValue(0)
+          toCurrencyAtDate: jest.fn().mockResolvedValue(0),
+          toCurrencyAtDateWithExchangeRate: jest.fn().mockResolvedValue(0)
         } as unknown as ExchangeRateDataService,
         null,
         {

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

@@ -532,6 +532,7 @@ export class ActivitiesService {
           createdAt: new Date(balanceItem.date),
           currency: account.currency,
           date: new Date(balanceItem.date),
+          exchangeRate: null,
           fee: 0,
           feeInAssetProfileCurrency: 0,
           feeInBaseCurrency: 0,
@@ -721,24 +722,28 @@ export class ActivitiesService {
             order.SymbolProfile.currency,
             order.date
           ),
-          this.exchangeRateDataService.toCurrencyAtDate(
+          this.exchangeRateDataService.toCurrencyAtDateWithExchangeRate({
-            order.fee,
+            assetProfileCurrency: order.SymbolProfile.currency,
-            order.currency ?? order.SymbolProfile.currency,
+            currency: order.currency ?? order.SymbolProfile.currency,
-            userCurrency,
+            date: order.date,
-            order.date
+            exchangeRate: order.exchangeRate,
-          ),
+            targetCurrency: userCurrency,
+            value: order.fee
+          }),
           this.exchangeRateDataService.toCurrencyAtDate(
             order.unitPrice,
             order.currency ?? order.SymbolProfile.currency,
             order.SymbolProfile.currency,
             order.date
           ),
-          this.exchangeRateDataService.toCurrencyAtDate(
+          this.exchangeRateDataService.toCurrencyAtDateWithExchangeRate({
-            value,
+            assetProfileCurrency: order.SymbolProfile.currency,
-            order.currency ?? order.SymbolProfile.currency,
+            currency: order.currency ?? order.SymbolProfile.currency,
-            userCurrency,
+            date: order.date,
-            order.date
+            exchangeRate: order.exchangeRate,
-          )
+            targetCurrency: userCurrency,
+            value
+          })
         ]);
 
         return {

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

@@ -237,6 +237,7 @@ export class ExportService {
           comment,
           currency,
           date,
+          exchangeRate,
           fee,
           id,
           quantity,
@@ -247,6 +248,7 @@ export class ExportService {
           return {
             accountId,
             comment,
+            exchangeRate,
             fee,
             id,
             quantity,

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

@@ -169,6 +169,7 @@ export class ImportService {
             comment: undefined,
             currency: undefined,
             createdAt: undefined,
+            exchangeRate: null,
             fee: 0,
             feeInAssetProfileCurrency: 0,
             feeInBaseCurrency: 0,
@@ -842,6 +843,7 @@ export class ImportService {
       const currency = activity.currency;
       const date = activity.date;
       const error = activity.error;
+      const exchangeRate = activity.exchangeRate;
       const fee = activity.fee;
       const quantity = activity.quantity;
       const tagIds = activity.tagIds ?? [];
@@ -885,6 +887,7 @@ export class ImportService {
           comment,
           currency,
           date,
+          exchangeRate,
           fee,
           quantity,
           type,
@@ -910,6 +913,7 @@ export class ImportService {
           comment,
           currency,
           date,
+          exchangeRate,
           fee,
           quantity,
           type,
@@ -951,12 +955,14 @@ export class ImportService {
       const value = new Big(quantity).mul(unitPrice).toNumber();
 
       const valueInBaseCurrency =
-        (await this.exchangeRateDataService.toCurrencyAtDate(
+        (await this.exchangeRateDataService.toCurrencyAtDateWithExchangeRate({
+          date,
+          exchangeRate,
           value,
-          currency ?? assetProfile.currency,
+          assetProfileCurrency: assetProfile.currency,
-          userCurrency,
+          currency: currency ?? assetProfile.currency,
-          date
+          targetCurrency: userCurrency
-        )) ?? 0;
+        })) ?? 0;
 
       activities.push({
         ...omit(order, ['SymbolProfile']),
@@ -1020,6 +1026,7 @@ export class ImportService {
         currency,
         dataSource,
         date: dateString,
+        exchangeRate,
         fee,
         quantity,
         symbol,
@@ -1054,6 +1061,7 @@ export class ImportService {
           currency,
           date,
           error,
+          exchangeRate,
           fee,
           quantity,
           type,

apps/api/src/app/portfolio/calculator/portfolio-calculator-test-utils.ts

@@ -17,6 +17,7 @@ export const activityDummyData = {
   comment: undefined,
   createdAt: new Date(),
   currency: undefined,
+  exchangeRate: null,
   fee: undefined,
   feeInAssetProfileCurrency: undefined,
   feeInBaseCurrency: undefined,

apps/api/src/app/portfolio/calculator/portfolio-calculator.ts

@@ -150,6 +150,7 @@ export abstract class PortfolioCalculator {
         ({
           assetProfile,
           date,
+          exchangeRate,
           feeInAssetProfileCurrency,
           feeInBaseCurrency,
           quantity,
@@ -172,6 +173,7 @@ export abstract class PortfolioCalculator {
             tags,
             type,
             date: format(date, DATE_FORMAT),
+            exchangeRate,
             fee: new Big(feeInAssetProfileCurrency),
             feeInBaseCurrency: new Big(feeInBaseCurrency),
             quantity: new Big(quantity),
@@ -1013,6 +1015,13 @@ export abstract class PortfolioCalculator {
 
       const exchangeRateAtActivityDate = exchangeRates[activity.date];
 
+      // Manual override of the asset to base currency rate at the activity
+      // date. It only applies to the cost-basis path (with currency effect of
+      // the activity itself). Current valuations and historical market prices
+      // stay on market rates.
+      const exchangeRateAtActivityDateForCostBasis =
+        activity.exchangeRate ?? exchangeRateAtActivityDate;
+
       if (activity.itemType === 'start') {
         // Take the unit price of the activity as the market price if there are no
         // activities of this symbol before the start date
@@ -1025,7 +1034,7 @@ export abstract class PortfolioCalculator {
       if (activity.fee) {
         activity.feeInBaseCurrency = activity.fee.mul(currentExchangeRate ?? 1);
         activity.feeInBaseCurrencyWithCurrencyEffect = activity.fee.mul(
-          exchangeRateAtActivityDate ?? 1
+          exchangeRateAtActivityDateForCostBasis ?? 1
         );
       }
 
@@ -1039,7 +1048,7 @@ export abstract class PortfolioCalculator {
         );
 
         activity.unitPriceInBaseCurrencyWithCurrencyEffect = unitPrice.mul(
-          exchangeRateAtActivityDate ?? 1
+          exchangeRateAtActivityDateForCostBasis ?? 1
         );
       }
 
@@ -1486,7 +1495,8 @@ export abstract class PortfolioCalculator {
     let totalLiabilitiesInBaseCurrency = new Big(0);
 
     for (const activity of activities) {
-      const exchangeRateAtActivityDate = exchangeRates[activity.date];
+      const exchangeRateAtActivityDate =
+        activity.exchangeRate ?? exchangeRates[activity.date];
 
       if (activity.type === 'DIVIDEND') {
         const dividend = activity.quantity.mul(activity.unitPrice);

apps/api/src/app/portfolio/interfaces/portfolio-calculator-activity.interface.ts

@@ -9,6 +9,7 @@ export interface PortfolioCalculatorActivity extends Pick<
     'assetSubClass' | 'currency' | 'dataSource' | 'name' | 'symbol' | 'userId'
   >;
   date: string;
+  exchangeRate?: number;
   fee: Big;
   feeInBaseCurrency: Big;
   quantity: Big;

apps/api/src/app/portfolio/portfolio.service.spec.ts

@@ -320,6 +320,69 @@ describe('PortfolioService', () => {
         interestInBaseCurrency: 15
       });
     });
+
+    it('should apply the manual exchange rate to the dividend and the interest in the currency of the asset profile', async () => {
+      jest.spyOn(accountService, 'accounts').mockResolvedValue([
+        {
+          activities: [
+            {
+              currency: 'USD',
+              date: new Date('2024-01-02'),
+              exchangeRate: 1.35,
+              quantity: 2,
+              SymbolProfile: { currency: 'USD' },
+              tags: [],
+              type: 'DIVIDEND',
+              unitPrice: 10
+            },
+            {
+              currency: 'USD',
+              date: new Date('2024-01-03'),
+              exchangeRate: 1.3,
+              quantity: 3,
+              SymbolProfile: { currency: 'USD' },
+              tags: [],
+              type: 'INTEREST',
+              unitPrice: 5
+            }
+          ],
+          balance: 0,
+          currency: 'SGD',
+          id: 'account-id',
+          name: 'Account'
+        }
+      ] as unknown as Awaited<ReturnType<typeof accountService.accounts>>);
+
+      jest.spyOn(portfolioService, 'getDetails').mockResolvedValue({
+        accounts: {}
+      } as unknown as Awaited<ReturnType<typeof portfolioService.getDetails>>);
+
+      jest.spyOn(userService, 'user').mockResolvedValue({
+        settings: { settings: { baseCurrency: 'SGD' } }
+      } as unknown as Awaited<ReturnType<typeof userService.user>>);
+
+      // Market rate USD to SGD of 2, which the manual rate must replace
+      jest
+        .spyOn(exchangeRateDataService, 'toCurrencyAtDate')
+        .mockImplementation(async (value, from, to) => {
+          return from === to ? value : value * 2;
+        });
+
+      jest
+        .spyOn(exchangeRateDataService, 'toCurrency')
+        .mockImplementation((value) => {
+          return value;
+        });
+
+      const [account] = await portfolioService.getAccounts({
+        userId: userDummyData.id
+      });
+
+      expect(account).toMatchObject({
+        dividendInBaseCurrency: 27,
+        interestInBaseCurrency: 19.5
+      });
+    });
   });
 
   describe('getAggregatedMarkets', () => {

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

@@ -309,6 +309,7 @@ export class PortfolioService {
         for (const {
           currency,
           date,
+          exchangeRate,
           quantity,
           SymbolProfile,
           tags,
@@ -324,20 +325,28 @@ export class PortfolioService {
           switch (type) {
             case ActivityType.DIVIDEND:
               dividendInBaseCurrency +=
-                (await this.exchangeRateDataService.toCurrencyAtDate(
+                (await this.exchangeRateDataService.toCurrencyAtDateWithExchangeRate(
-                  new Big(quantity).mul(unitPrice).toNumber(),
+                  {
-                  currency ?? SymbolProfile.currency,
+                    date,
-                  userCurrency,
+                    exchangeRate,
-                  date
+                    assetProfileCurrency: SymbolProfile.currency,
+                    currency: currency ?? SymbolProfile.currency,
+                    targetCurrency: userCurrency,
+                    value: new Big(quantity).mul(unitPrice).toNumber()
+                  }
                 )) ?? 0;
               break;
             case ActivityType.INTEREST:
               interestInBaseCurrency +=
-                (await this.exchangeRateDataService.toCurrencyAtDate(
+                (await this.exchangeRateDataService.toCurrencyAtDateWithExchangeRate(
-                  new Big(quantity).mul(unitPrice).toNumber(),
+                  {
-                  currency ?? SymbolProfile.currency,
+                    date,
-                  userCurrency,
+                    exchangeRate,
-                  date
+                    assetProfileCurrency: SymbolProfile.currency,
+                    currency: currency ?? SymbolProfile.currency,
+                    targetCurrency: userCurrency,
+                    value: new Big(quantity).mul(unitPrice).toNumber()
+                  }
                 )) ?? 0;
               break;
           }

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

@@ -377,6 +377,42 @@ export class ExchangeRateDataService {
     return undefined;
   }
 
+  /**
+   * Converts the value of an activity at its date. A manual exchange rate of
+   * the activity replaces the market rate from the currency of the asset
+   * profile to the target currency.
+   */
+  public async toCurrencyAtDateWithExchangeRate({
+    assetProfileCurrency,
+    currency,
+    date,
+    exchangeRate,
+    targetCurrency,
+    value
+  }: {
+    assetProfileCurrency: string;
+    currency: string;
+    date: Date;
+    exchangeRate?: number | null;
+    targetCurrency: string;
+    value: number;
+  }) {
+    if (exchangeRate == null) {
+      return this.toCurrencyAtDate(value, currency, targetCurrency, date);
+    }
+
+    const valueInAssetProfileCurrency = await this.toCurrencyAtDate(
+      value,
+      currency,
+      assetProfileCurrency,
+      date
+    );
+
+    return valueInAssetProfileCurrency === undefined
+      ? undefined
+      : valueInAssetProfileCurrency * exchangeRate;
+  }
+
   private async getExchangeRates({
     currencyFrom,
     currencyTo,

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.component.ts

@@ -224,6 +224,7 @@ export class GfCreateOrUpdateActivityDialogComponent {
         Validators.required
       ],
       date: [this.data.activity?.date, Validators.required],
+      exchangeRate: [this.data.activity?.exchangeRate ?? null],
       fee: [this.data.activity?.fee, Validators.required],
       name: [this.data.activity?.assetProfile?.name, Validators.required],
       quantity: [this.data.activity?.quantity, Validators.required],
@@ -488,6 +489,10 @@ export class GfCreateOrUpdateActivityDialogComponent {
   }
 
   protected async onSubmit() {
+    const assetCurrency = this.activityForm.get('currency')?.value;
+    const baseCurrency = this.data.user?.settings?.baseCurrency;
+    const exchangeRateValue = this.activityForm.get('exchangeRate')?.value;
+
     const activity: CreateOrderDto | UpdateOrderDto = {
       accountId: this.activityForm.get('accountId')?.value,
       assetClass: this.activityForm.get('assetClass')?.value,
@@ -501,6 +506,10 @@ export class GfCreateOrUpdateActivityDialogComponent {
         ? 'MANUAL'
         : this.activityForm.get('dataSource')?.value,
       date: this.activityForm.get('date')?.value,
+      exchangeRate:
+        assetCurrency && baseCurrency && assetCurrency !== baseCurrency
+          ? (exchangeRateValue ?? null)
+          : null,
       fee: this.activityForm.get('fee')?.value,
       quantity: this.activityForm.get('quantity')?.value,
       symbol:

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.html

@@ -227,6 +227,25 @@
         }
       </div>
     </div>
+    @if (
+      activityForm.get('currency')?.value &&
+      data.user?.settings?.baseCurrency &&
+      activityForm.get('currency')?.value !== data.user?.settings?.baseCurrency
+    ) {
+      <div class="mb-3">
+        <mat-form-field appearance="outline" class="w-100">
+          <mat-label i18n
+            >Exchange rate ({{ activityForm.get('currency')?.value }}
+            →
+            {{ data.user?.settings?.baseCurrency }})</mat-label
+          >
+          <input formControlName="exchangeRate" matInput type="number" />
+          <mat-hint i18n
+            >Optional. Leave empty to use the market rate.</mat-hint
+          >
+        </mat-form-field>
+      </div>
+    }
     <div
       class="mb-3"
       [class.d-none]="

libs/common/src/lib/dtos/create-order.dto.ts

@@ -21,6 +21,7 @@ import {
   IsNotEmpty,
   IsNumber,
   IsOptional,
+  IsPositive,
   IsString,
   MaxLength,
   Min,
@@ -64,6 +65,11 @@ export class CreateOrderDto {
   @Validate(IsAfter1970Constraint)
   date: string;
 
+  @IsNumber()
+  @IsOptional()
+  @IsPositive()
+  exchangeRate?: number | null;
+
   @IsNumber()
   @Min(0)
   fee: number;

libs/common/src/lib/dtos/update-order.dto.ts

@@ -20,6 +20,7 @@ import {
   IsNotEmpty,
   IsNumber,
   IsOptional,
+  IsPositive,
   IsString,
   MaxLength,
   Min,
@@ -62,6 +63,11 @@ export class UpdateOrderDto {
   @Validate(IsAfter1970Constraint)
   date: string;
 
+  @IsNumber()
+  @IsOptional()
+  @IsPositive()
+  exchangeRate?: number | null;
+
   @IsNumber()
   @Min(0)
   fee: number;

libs/ui/src/lib/activities-table/activities-table.component.stories.ts

@@ -28,6 +28,7 @@ const activities: Activity[] = [
     comment: null,
     createdAt: new Date('2025-04-09T13:47:33.133Z'),
     currency: 'USD',
+    exchangeRate: null,
     date: new Date('2025-04-09T13:45:45.504Z'),
     fee: 1,
     id: 'a76968ff-80a4-4453-81ed-c3627dea3919',
@@ -92,6 +93,7 @@ const activities: Activity[] = [
     comment: null,
     createdAt: new Date('2024-08-07T13:40:39.103Z'),
     currency: 'USD',
+    exchangeRate: null,
     date: new Date('2024-08-07T13:38:06.289Z'),
     fee: 2.97,
     id: '0c2f4fbf-6edc-4adc-8f83-abf8148500ec',
@@ -156,6 +158,7 @@ const activities: Activity[] = [
     comment: null,
     createdAt: new Date('2024-03-12T15:15:21.217Z'),
     currency: 'USD',
+    exchangeRate: null,
     date: new Date('2024-03-12T15:14:38.597Z'),
     fee: 45.29,
     id: 'bfc92677-faf4-4d4f-9762-e0ec056525c2',
@@ -220,6 +223,7 @@ const activities: Activity[] = [
     comment: null,
     createdAt: new Date('2024-02-23T15:53:46.907Z'),
     currency: 'USD',
+    exchangeRate: null,
     date: new Date('2024-02-23T15:53:15.745Z'),
     fee: 3,
     id: '7c9ceb54-acb1-4850-bfb1-adb41c29fd6a',
@@ -284,6 +288,7 @@ const activities: Activity[] = [
     comment: null,
     createdAt: new Date('2023-01-11T14:35:22.325Z'),
     currency: 'USD',
+    exchangeRate: null,
     date: new Date('2023-01-11T14:34:55.174Z'),
     fee: 7.38,
     id: '3fe87b3f-78de-407a-bc02-4189b221051f',

prisma/migrations/20261004000000_added_exchange_rate_to_order/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Order" ADD COLUMN "exchangeRate" DOUBLE PRECISION;

prisma/schema.prisma

@@ -189,6 +189,7 @@ model Order {
   createdAt       DateTime      @default(now())
   currency        String?
   date            DateTime
+  exchangeRate    Float?
   fee             Float
   id              String        @id @default(uuid())
   quantity        Float