feat: add caching at api level

apps/cowswap-frontend/src/api/cowProtocol/apiCached.ts

@@ -0,0 +1,21 @@
+import ms from 'ms.macro'
+import * as api from './api'
+import QuickLRU from 'quick-lru'
+import { fetchWithCache } from '@cowprotocol/common-utils'
+
+import { NativePriceResponse, SupportedChainId as ChainId } from '@cowprotocol/cow-sdk'
+
+export * from './api'
+
+const nativePriceCache = new QuickLRU<string, Promise<NativePriceResponse>>({
+  maxSize: 1000,
+  maxAge: ms`1m`,
+})
+
+export async function getNativePrice(chainId: ChainId, currencyAddress: string): Promise<NativePriceResponse> {
+  return fetchWithCache({
+    key: `${chainId}:${currencyAddress}`,
+    fetch: () => api.getNativePrice(chainId, currencyAddress),
+    cache: nativePriceCache,
+  })
+}

apps/cowswap-frontend/src/api/cowProtocol/index.ts

@@ -1 +1 @@
-export * from './api'
+export * from './apiCached'

libs/common-utils/src/cache.ts

@@ -0,0 +1,19 @@
+import QuickLRU from 'quick-lru'
+
+export interface GetAndCacheParams<T> {
+  key: string
+  fetch: () => Promise<T>
+  cache: QuickLRU<string, Promise<T>>
+}
+
+export async function fetchWithCache<T>({ key, fetch, cache }: GetAndCacheParams<T>): Promise<T> {
+  const cached = cache.get(key)
+  if (cached) {
+    return cached
+  }
+
+  const resultPromise = fetch()
+  cache.set(key, resultPromise)
+
+  return resultPromise
+}

libs/common-utils/src/index.ts

@@ -58,3 +58,4 @@ export * from './userAgent'
 export * from './getCurrencyAddress'
 export * from './errorToString'
 export * from './fetch'
+export * from './cache'

package.json

@@ -192,6 +192,7 @@
     "polyfill-object.fromentries": "^1.0.1",
     "popper-max-size-modifier": "^0.2.0",
     "qs": "^6.12.1",
+    "quick-lru": "^7.0.0",
     "react": "19.0.0-rc-66855b96-20241106",
     "react-appzi": "^1.0.4",
     "react-confetti": "^6.1.0",
@@ -343,4 +344,4 @@
     "vite-tsconfig-paths": "~4.3.2",
     "vitest": "~0.32.0"
   }
-}
+}

yarn.lock

@@ -26054,6 +26054,11 @@ quick-lru@^5.1.1:
   resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-5.1.1.tgz#366493e6b3e42a3a6885e2e99d18f80fb7a8c932"
   integrity sha512-WuyALRjWPDGtt/wzJiadO5AXY+8hZ80hVpe6MyivgraREW751X3SbhRvG3eLKOYN+8VEvqLcf3wdnt44Z4S4SA==
 
+quick-lru@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-7.0.0.tgz#447f6925b33ae4d2d637e211967d74bae4b99c3f"
+  integrity sha512-MX8gB7cVYTrYcFfAnfLlhRd0+Toyl8yX8uBx1MrX7K0jegiz9TumwOK27ldXrgDlHRdVi+MqU9Ssw6dr4BNreg==
+
 rabin-wasm@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/rabin-wasm/-/rabin-wasm-0.1.5.tgz#5b625ca007d6a2cbc1456c78ae71d550addbc9c9"