From aa06166a0ebe0f6edd8b18a31f03d787930478ac Mon Sep 17 00:00:00 2001
From: Riku <riku.ayanokoji@gmail.com>
Date: Sat, 10 Nov 2018 01:42:00 +0800
Subject: [PATCH 1/3] add typescript definitions

---
 index.d.ts   | 7 +++++++
 package.json | 1 +
 2 files changed, 8 insertions(+)
 create mode 100644 index.d.ts

diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..70e98fc
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,7 @@
+type Tuple<T1, T2> = [T1, T2];
+type A2AResult<TResult, TError> = Tuple<TError|null, TResult|undefined>;
+
+declare function a2a<TResult=any, TError = any>(promise: Promise<TResult>): Promise<A2AResult<TResult, TError>>;
+declare function a2a<TResult=any, TError = any>(promise: Promise<TResult>[]): Promise<A2AResult<TResult[], TError>>;
+
+export default a2a;
diff --git a/package.json b/package.json
index d1a10f8..6d9e71f 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "description": "Async await to Array",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "test": "nyc --reporter=html mocha"
   },

From ff9483b07db8252683393476c42907e19789c838 Mon Sep 17 00:00:00 2001
From: Riku <riku.ayanokoji@gmail.com>
Date: Sat, 10 Nov 2018 01:52:26 +0800
Subject: [PATCH 2/3] add types test

---
 package.json  |  7 +++++--
 test/tsd.ts   | 11 +++++++++++
 tsconfig.json | 12 ++++++++++++
 3 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100644 test/tsd.ts
 create mode 100644 tsconfig.json

diff --git a/package.json b/package.json
index 6d9e71f..08db1de 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "types": "index.d.ts",
   "scripts": {
-    "test": "nyc --reporter=html mocha"
+    "test": "nyc --reporter=html mocha && ts-node test/tsd.ts"
   },
   "repository": {
     "type": "git",
@@ -24,7 +24,10 @@
   },
   "homepage": "https://github.com/invertase/a2a#readme",
   "devDependencies": {
+    "@types/node": "^10.12.4",
     "mocha": "^5.2.0",
-    "nyc": "^13.0.1"
+    "nyc": "^13.0.1",
+    "ts-node": "^7.0.1",
+    "typescript": "^3.1.6"
   }
 }
diff --git a/test/tsd.ts b/test/tsd.ts
new file mode 100644
index 0000000..5e9fa78
--- /dev/null
+++ b/test/tsd.ts
@@ -0,0 +1,11 @@
+import a2a from '../';
+
+a2a(Promise.resolve(1))
+  .then(([err, result]) => {
+    console.log(result as number);
+  });
+
+a2a([Promise.resolve(1)])
+  .then(([err, result]) => {
+    console.log(result as number[]);
+  });
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..f625847
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "commonjs",
+    "lib": ["es2015"],
+    "strict": true,
+    "moduleResolution": "node",
+    "types": ["node"],
+    "esModuleInterop": true
+  },
+  "include": ["index.d.ts", "test/*.ts"]
+}
\ No newline at end of file

From d26b4c98c80f1bed00b290e76c6c25a7a7da799e Mon Sep 17 00:00:00 2001
From: Riku <riku.ayanokoji@gmail.com>
Date: Sat, 10 Nov 2018 01:59:10 +0800
Subject: [PATCH 3/3] Update README.md for typescript

---
 README.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/README.md b/README.md
index 97fdc21..73df1dd 100644
--- a/README.md
+++ b/README.md
@@ -44,3 +44,22 @@ async function example2() {
 example1();
 example2();
 ```
+
+## TypeScript
+```ts
+import a2a from 'a2a';
+
+a2a(Promise.resolve(123)) // => Promise<[any, number]>
+  .then(([error, result]) => {
+    console.log(result as number);
+  });
+
+// => Promise<[any, number|string]>
+a2a<number|string>(Promise.resolve('123'));
+
+// => Promise<[any, Array<number|string>]>
+a2a<number|string>([Promise.resolve('123')]);
+
+// => Promise<[Error, number|string>>
+a2a<number|string, Error>(Promise.resolve('123'));
+```