Emit Oracle Price Message in Rates Adapter

packages/stack/src/rates/base-rates.ts

@@ -11,7 +11,9 @@ export type RatesEventMap = {
   };
 };
 
-export abstract class BaseRates extends EventEmitter<RatesEventMap> {
+export abstract class BaseRates<
+  T extends RatesEventMap = RatesEventMap,
+> extends EventEmitter<T> {
   /** Starts the given rates adapter so that it will emit events on price updates. */
   public abstract start(): Promise<void>;
 

packages/stack/src/rates/rates-oracle.ts

@@ -5,10 +5,17 @@ import {
   OraclePriceMessage,
 } from '@generalprotocols/oracle-client';
 
-import { BaseRates } from './index.js';
+import { type RatesEventMap, BaseRates } from './index.js';
+
+// Add the Oracle Price Message to our Events for this Adapter.
+export type RatesOracleEventMap = RatesEventMap & {
+  rateUpdated: {
+    oraclePriceMessage: OraclePriceMessage;
+  };
+};
 
 // TODO: Add RatesHistorical trait since Oracles can provide historical rates.
-export class RatesOracle extends BaseRates {
+export class RatesOracle extends BaseRates<RatesOracleEventMap> {
   /**
    * Create a new rates oracle.
    *
@@ -153,6 +160,7 @@ export class RatesOracle extends BaseRates {
       numeratorUnitCode: oracle.SOURCE_NUMERATOR_UNIT_CODE,
       denominatorUnitCode: oracle.SOURCE_DENOMINATOR_UNIT_CODE,
       price: priceValue,
+      oraclePriceMessage: message,
     });
   }
 }