feat: add bond details, yields and credit ratings

src/tbank/tbank.client.ts

@@ -21,6 +21,8 @@ import { StructuredLogger } from '../common/logging/structured-logger.service';
 
 import type {
   TbankShare,
+  TbankBond,
+  TbankCoupon,
   TbankCandle,
   TbankLastPrice,
   TbankFundamentals,
@@ -306,6 +308,46 @@ export class TbankClient {
     ).then((response) => response.instruments ?? []);
   }
 
+  findBonds(token: string, query: string): Promise<TbankBond[]> {
+    return this.call<{ instruments?: TbankBond[] }>(
+      token,
+      this.sparseInstruments,
+      'findInstrument',
+      {
+        query,
+        instrumentKind: 'INSTRUMENT_TYPE_BOND',
+      },
+    ).then((response) => response.instruments ?? []);
+  }
+  getBond(token: string, uid: string): Promise<TbankBond | null> {
+    return this.call<{ instrument?: TbankBond }>(
+      token,
+      this.sparseInstruments,
+      'bondBy',
+      {
+        idType: 'INSTRUMENT_ID_TYPE_UID',
+        id: uid,
+      },
+    ).then((response) => response.instrument ?? null);
+  }
+  getBondCoupons(
+    token: string,
+    uid: string,
+    from: string,
+    to: string,
+  ): Promise<TbankCoupon[]> {
+    return this.call<{ events?: TbankCoupon[] }>(
+      token,
+      this.sparseInstruments,
+      'getBondCoupons',
+      {
+        instrumentId: uid,
+        from: { seconds: String(utcSeconds(from)) },
+        to: { seconds: String(utcSeconds(to)) },
+      },
+    ).then((response) => response.events ?? []);
+  }
+
   getShare(token: string, uid: string): Promise<TbankShare | null> {
     return this.call<{ instrument?: TbankShare }>(
       token,