refactor!: support RUB only (WealthLedger/main#55) (#204)

BREAKING CHANGE: per-currency API fields replaced with single RUB Money.

src/integrations/moex/moex.client.spec.ts

@@ -340,4 +340,59 @@ describe('MoexClient', () => {
       expect(starts).toEqual(['0', '1']);
     },
   );
+
+  it('filters non-RUB coupons and maturity out of bond events', async () => {
+    const pages: Record<string, unknown> = {
+      coupons: Response.json({
+        'coupons': {
+          columns: ['coupondate', 'value', 'faceunit'],
+          data: [
+            ['2099-02-01', '2', 'SUR'],
+            ['2099-02-02', '3', 'USD'],
+          ],
+        },
+        'coupons.cursor': {
+          columns: ['INDEX', 'TOTAL', 'PAGESIZE'],
+          data: [[0, 2, 100]],
+        },
+      }),
+      offers: Response.json({
+        'offers': {
+          columns: ['offerdate'],
+          data: [['2099-02-28']],
+        },
+        'offers.cursor': {
+          columns: ['INDEX', 'TOTAL', 'PAGESIZE'],
+          data: [[0, 1, 100]],
+        },
+      }),
+      description: Response.json({
+        description: {
+          columns: ['name', 'value'],
+          data: [
+            ['MATDATE', '2099-02-28'],
+            ['FACEVALUE', '500'],
+            ['FACEUNIT', 'USD'],
+          ],
+        },
+      }),
+    };
+    const fetchMock = jest
+      .spyOn(global, 'fetch')
+      .mockImplementation((input) => {
+        const url = new URL(input instanceof Request ? input.url : String(input));
+        const block = url.searchParams.get('iss.only')?.split(',')[0] ?? 'description';
+        // eslint-disable-next-line security/detect-object-injection -- Keys are fixed MOEX block names of this test's page map.
+        const page = pages[block] ?? pages.description;
+        return Promise.resolve(page as Response);
+      });
+    try {
+      await expect(new MoexClient().bondEvents('BOND')).resolves.toEqual([
+        { type: 'coupon', date: '2099-02-01', value: '2', currency: 'RUB' },
+        { type: 'offer', date: '2099-02-28' },
+      ]);
+    } finally {
+      fetchMock.mockRestore();
+    }
+  });
 });

src/integrations/moex/moex.client.ts

@@ -157,9 +157,9 @@ export class MoexClient {
     for (const row of coupons) {
       const date = text(row.coupondate);
       const value = numberText(row.value);
-      const currency = currencyText(row.faceunit);
-      if (date && value && currency) {
-        events.push({ type: 'coupon', date, value, currency });
+      // RUB-only: coupons in other currencies are filtered out at this ingest boundary.
+      if (date && value && currencyText(row.faceunit) === 'RUB') {
+        events.push({ type: 'coupon', date, value, currency: 'RUB' });
       }
     }
     for (const row of offers) {
@@ -171,9 +171,8 @@ export class MoexClient {
     );
     const date = values.get('MATDATE');
     const value = numberText(values.get('FACEVALUE'));
-    const currency = currencyText(values.get('FACEUNIT'));
-    if (date && value && currency) {
-      events.push({ type: 'maturity', date, value, currency });
+    if (date && value && currencyText(values.get('FACEUNIT')) === 'RUB') {
+      events.push({ type: 'maturity', date, value, currency: 'RUB' });
     }
     return events;
   }

src/integrations/tbank/decimal.ts

@@ -1,4 +1,6 @@
-import { Decimal } from '../../common/decimal';
+import type { Money } from '../../common/money.types';
+
+import { Decimal, formatDecimal } from '../../common/decimal';
 
 const MISSING_PROTO_COMPONENT = 0;
 
@@ -6,6 +8,12 @@ const NANO = 1_000_000_000n;
 
 export type ProtoDecimal = { nano?: number | string; units?: number | string };
 
+export function rubMoney(value?: ProtoDecimal & { currency?: string }): Money | null {
+  return value?.currency?.trim().toUpperCase() === 'RUB'
+    ? { currency: 'RUB', value: formatDecimal(decimal(value)) }
+    : null;
+}
+
 export function decimal(value: ProtoDecimal): Decimal {
   return {
     value: BigInt(value.units ?? MISSING_PROTO_COMPONENT) * NANO + BigInt(value.nano ?? MISSING_PROTO_COMPONENT),