feat: memoize: add typescript definition (#195)

packages/memoize/package.json

@@ -46,5 +46,6 @@
   "license": "MIT",
   "publishConfig": {
     "access": "public"
-  }
+  },
+  "types": "./src/index.d.ts"
 }

packages/memoize/src/index.d.ts

@@ -0,0 +1,18 @@
+import { Options, Store } from '@keyvhq/core'
+
+declare function memoize<RawResult, Result, Args extends any[]> (
+  fn: (...args: Args) => Promise<RawResult>,
+  keyvOptions: Options | Store,
+  options: {
+    key?: (value: RawResult) => any
+    objectMode?: boolean
+    staleTtl?: number | boolean | ((value: any) => number | boolean)
+    ttl?: number | ((value: any) => number)
+    // Difficult to type this one, so we'll just leave it as any
+    // When options.value is not provided, the return type of the memoized function is Result
+    // I can't figure out how to type this, so I'm just going to leave it as any
+    value?: (value: RawResult) => Result
+  }
+): (...args: Args) => Promise<RawResult>
+
+export default memoize