chore(currency): cache .fromId result

packages/currency/src/currencyManager.ts

@@ -20,6 +20,9 @@ export class CurrencyManager<TMeta = unknown> implements CurrencyTypes.ICurrency
   private readonly legacyTokens: CurrencyTypes.LegacyTokenMap;
   private readonly conversionPairs: CurrencyTypes.AggregatorsMap;
 
+  private readonly knownCurrenciesById: Map<string, CurrencyTypes.CurrencyDefinition<TMeta>> =
+    new Map();
+
   private static defaultInstance: CurrencyManager;
 
   /**
@@ -84,7 +87,18 @@ export class CurrencyManager<TMeta = unknown> implements CurrencyTypes.ICurrency
    * Gets a supported currency from its CurrencyTypes.CurrencyDefinition id
    */
   fromId(id: string): CurrencyTypes.CurrencyDefinition<TMeta> | undefined {
-    return this.knownCurrencies.find((knownCurrency) => knownCurrency.id === id);
+    const cachedCurrency = this.knownCurrenciesById.get(id);
+    if (cachedCurrency) {
+      return cachedCurrency;
+    }
+
+    const currency = this.knownCurrencies.find((knownCurrency) => knownCurrency.id === id);
+    if (!currency) {
+      return undefined;
+    }
+
+    this.knownCurrenciesById.set(id, currency);
+    return currency;
   }
 
   /**

packages/currency/test/currencyManager.test.ts

@@ -153,6 +153,19 @@ describe('CurrencyManager', () => {
   });
 
   describe('Accessing currencies', () => {
+    it('access a common token by its id', () => {
+      expect(currencyManager.fromId('USDC-multichain-moonbeam')).toMatchObject({
+        symbol: 'USDC-multichain',
+        decimals: 6,
+      });
+
+      // Run the test twice to ensure caching result don't break things.
+      expect(currencyManager.fromId('USDC-multichain-moonbeam')).toMatchObject({
+        symbol: 'USDC-multichain',
+        decimals: 6,
+      });
+    });
+
     it('access a common token by its symbol', () => {
       expect(currencyManager.from('DAI')).toMatchObject({
         symbol: 'DAI',