feat: init example

Author: spacesailor24

package.json

@@ -33,7 +33,8 @@
     "wrapped-keys/nodejs",
     "hacker-guides/encryption/encrypt-file",
     "hacker-guides/encryption/encrypt-large-file",
-    "hacker-guides/encryption/encrypt-string"
+    "hacker-guides/encryption/encrypt-string",
+    "sign-as-action/nodejs"
   ],
   "scripts": {
     "install:all": "yarn workspaces focus --all",

sign-as-action/nodejs/.env.example

@@ -0,0 +1 @@
+ETHEREUM_PRIVATE_KEY=

sign-as-action/nodejs/.mocharc.json

@@ -0,0 +1,4 @@
+{
+  "$schema": "https://json.schemastore.org/mocharc.json",
+  "require": "tsx"
+}

sign-as-action/nodejs/README.md

@@ -0,0 +1,30 @@
+{
+  "name": "sign-as-action-nodejs",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "type": "module",
+  "scripts": {
+    "test": "npx @dotenvx/dotenvx run -- mocha test/**/*.spec.ts"
+  },
+  "dependencies": {
+    "@dotenvx/dotenvx": "^0.44.1",
+    "@lit-protocol/auth-helpers": "^7.0.4",
+    "@lit-protocol/constants": "^7.0.4",
+    "@lit-protocol/contracts-sdk": "^7.0.4",
+    "@lit-protocol/lit-node-client": "^7.0.4",
+    "ethers": "5.7.2"
+  },
+  "devDependencies": {
+    "@types/chai": "^4.3.16",
+    "@types/chai-json-schema": "^1.4.10",
+    "@types/mocha": "^10.0.6",
+    "chai": "4.5.0",
+    "chai-json-schema": "^1.5.1",
+    "ipfs-only-hash": "^4.0.0",
+    "mocha": "^10.4.0",
+    "tsc": "^2.0.4",
+    "tsx": "^4.12.0",
+    "typescript": "^5.4.5"
+  }
+}

sign-as-action/nodejs/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "sign-as-action-nodejs",
+  "root": "sign-as-action/nodejs",
+  "targets": {
+    "test-lit": {
+      "executor": "nx:run-commands",
+      "options": {
+        "command": "cd sign-as-action/nodejs && yarn && yarn test"
+      }
+    }
+  }
+}

sign-as-action/nodejs/project.json

@@ -0,0 +1,4 @@
+export * from "./signAsAction";
+export * from "./verifyActionSignature";
+export * from './signAsActionLitAction';
+export * from './verifyActionSignatureLitAction';

sign-as-action/nodejs/src/index.ts

@@ -0,0 +1,47 @@
+import * as ethers from "ethers";
+import { LitNodeClient } from "@lit-protocol/lit-node-client";
+import { LIT_RPC, LIT_NETWORK } from "@lit-protocol/constants";
+
+import { getEnv, getSessionSigs } from "./utils";
+import { signAsActionLitAction } from "./signAsActionLitAction";
+
+const ETHEREUM_PRIVATE_KEY = getEnv("ETHEREUM_PRIVATE_KEY");
+
+export const signAsAction = async ({ toSign }: { toSign: Uint8Array }) => {
+    let litNodeClient: LitNodeClient;
+
+    try {
+        const ethersSigner = new ethers.Wallet(
+            ETHEREUM_PRIVATE_KEY,
+            new ethers.providers.JsonRpcProvider(LIT_RPC.CHRONICLE_YELLOWSTONE)
+        );
+
+        console.log("🔄 Connecting to Lit network...");
+        litNodeClient = new LitNodeClient({
+            litNetwork: LIT_NETWORK.DatilDev,
+            debug: false,
+        });
+        await litNodeClient.connect();
+        console.log("✅ Connected to Lit network");
+
+        const sessionSigs = await getSessionSigs({ litNodeClient, ethersSigner });
+
+        console.log("🔄 Executing signAsAction Lit Action...");
+        const litActionSignature = await litNodeClient.executeJs({
+            sessionSigs,
+            code: signAsActionLitAction,
+            jsParams: {
+                toSign,
+                sigName: "sig",
+                signingScheme: "EcdsaK256Sha256",
+            },
+        });
+        console.log("✅ Executed signAsAction Lit Action");
+
+        return litActionSignature;
+    } catch (error) {
+        console.error(error);
+    } finally {
+        litNodeClient!.disconnect();
+    }
+};

sign-as-action/nodejs/src/signAsAction.ts

@@ -0,0 +1,11 @@
+// @ts-nocheck
+const _signAsActionLitAction = async () => {
+  const signature = await Lit.Actions.signAsAction({
+    toSign,
+    sigName,
+    signingScheme,
+  });
+  Lit.Actions.setResponse({ response: signature });
+};
+
+export const signAsActionLitAction = `(${_signAsActionLitAction.toString()})();`;

sign-as-action/nodejs/src/signAsActionLitAction.ts

@@ -0,0 +1,66 @@
+import * as ethers from "ethers";
+import { LitNodeClient } from "@lit-protocol/lit-node-client";
+import { LIT_ABILITY } from "@lit-protocol/constants";
+import {
+  createSiweMessageWithRecaps,
+  generateAuthSig,
+  LitActionResource,
+} from "@lit-protocol/auth-helpers";
+
+export const getEnv = (name: string): string => {
+  // Browser environment
+  if (typeof globalThis !== 'undefined' && 'window' in globalThis) {
+    const envMap: Record<string, string | undefined> = {
+      'ETHEREUM_PRIVATE_KEY': process.env.NEXT_PUBLIC_ETHEREUM_PRIVATE_KEY
+    };
+    const env = envMap[name];
+    if (env === undefined || env === "")
+      throw new Error(
+        `Browser: ${name} ENV is not defined, please define it in the .env file`
+      );
+    return env;
+  }
+
+  // Node environment
+  const env = process.env[name];
+  if (env === undefined || env === "")
+    throw new Error(
+      `Node: ${name} ENV is not defined, please define it in the .env file`
+    );
+  return env;
+};
+
+export const getSessionSigs = async ({ litNodeClient, ethersSigner }: { litNodeClient: LitNodeClient, ethersSigner: ethers.Wallet }) => {
+  console.log("🔄 Getting Session Signatures...");
+  const sessionSigs = await litNodeClient.getSessionSigs({
+    chain: "ethereum",
+    expiration: new Date(Date.now() + 1000 * 60 * 60 * 24).toISOString(), // 24 hours
+    resourceAbilityRequests: [
+      {
+        resource: new LitActionResource("*"),
+        ability: LIT_ABILITY.LitActionExecution,
+      },
+    ],
+    authNeededCallback: async ({
+      resourceAbilityRequests,
+      expiration,
+      uri,
+    }) => {
+      const toSign = await createSiweMessageWithRecaps({
+        uri: uri!,
+        expiration: expiration!,
+        resources: resourceAbilityRequests!,
+        walletAddress: ethersSigner.address,
+        nonce: await litNodeClient.getLatestBlockhash(),
+        litNodeClient,
+      });
+
+      return await generateAuthSig({
+        signer: ethersSigner,
+        toSign,
+      });
+    },
+  });
+  console.log("✅ Got Session Signatures");
+  return sessionSigs;
+};