feat: Add sign score lambda

sign-score/index.js

@@ -0,0 +1,40 @@
+import ethers from "ethers";
+
+const WALLET_PK = process.env.WALLET_PK;
+
+export const handler = async (event) => {
+  try {
+    const { score, passport_id } = event;
+
+    const wallet = new ethers.Wallet(WALLET_PK);
+
+    const numberHash = ethers.utils.solidityKeccak256(
+      ["uint256", "uint256"],
+      [score, passport_id]
+    );
+
+    const signature = await wallet.signMessage(
+      ethers.utils.arrayify(numberHash)
+    );
+
+    const responseBody = {
+      statusCode: 200,
+      body: {
+        signature,
+        passport_id,
+        score,
+      },
+    };
+
+    return responseBody;
+  } catch (error) {
+    console.log("Error");
+    console.error(error);
+    return {
+      statusCode: 500,
+      body: { error: error },
+    };
+  }
+};
+
+export default handler;

sign-score/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "create-passport",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "watch:build": "tsc --watch",
+    "compile": "tsc"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ethers": "^5.7.0"
+  }
+}