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add fetch and encrypt decrypt tests
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‎exampleLitActions/src/encryptDecrypt.ts‎

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import { LitNodeClient } from '@lit-protocol/lit-node-client';
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import { LIT_RPC, LIT_ABILITY } from "@lit-protocol/constants";
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import {
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createSiweMessage,
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generateAuthSig,
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LitActionResource,
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} from "@lit-protocol/auth-helpers";
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import * as ethers from "ethers";
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// Utility function to get environment variables
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const getEnv = (name: string): string => {
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const value = process.env[name];
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if (!value) {
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console.warn(`Environment variable ${name} is not set`);
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}
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return value || "";
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};
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// Environment variables
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const ETHEREUM_PRIVATE_KEY = getEnv("ETHEREUM_PRIVATE_KEY");
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// Define the Lit Action code for conditional signing
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const litActionCode = `
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async ({ accessControlConditions, ciphertext, dataToEncryptHash }) => {
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const resp = await Lit.Actions.decryptAndCombine({
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accessControlConditions,
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ciphertext,
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dataToEncryptHash,
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authSig: null,
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chain: 'ethereum',
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});
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Lit.Actions.setResponse({ response: resp });
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}
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`;
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// Define the encryptDecryptResult type with success and error properties
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interface encryptDecryptResult {
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response: any;
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success: boolean;
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error?: any;
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}
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/**
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* Execute encrypt and then decrypt inside a Lit Action
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* @returns Result of the encryptDecrypt
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*/
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export const encryptDecrypt = async (): Promise<encryptDecryptResult> => {
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try {
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// Create ethers wallet for signing
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const ethersWallet = new ethers.Wallet(
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ETHEREUM_PRIVATE_KEY,
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new ethers.providers.JsonRpcProvider(LIT_RPC.CHRONICLE_YELLOWSTONE)
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);
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// Initialize Lit Node Client
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const litNodeClient = new LitNodeClient({
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alertWhenUnauthorized: false,
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litNetwork: "datil-dev",
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debug: true,
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});
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await litNodeClient.connect();
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// Get session signatures
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const sessionSigs = await litNodeClient.getSessionSigs({
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chain: "ethereum",
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expiration: new Date(Date.now() + 1000 * 60 * 10).toISOString(), // 10 minutes
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resourceAbilityRequests: [
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{
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resource: new LitActionResource("*"),
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ability: LIT_ABILITY.LitActionExecution,
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},
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],
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authNeededCallback: async ({
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uri,
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expiration,
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resourceAbilityRequests,
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}) => {
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const toSign = await createSiweMessage({
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uri,
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expiration,
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resources: resourceAbilityRequests,
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walletAddress: await ethersWallet.getAddress(),
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nonce: await litNodeClient.getLatestBlockhash(),
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litNodeClient,
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});
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return await generateAuthSig({
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signer: ethersWallet,
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toSign,
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});
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},
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});
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// Define access control conditions
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const chain = 'ethereum';
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const accessControlConditions = [
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{
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contractAddress: '',
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standardContractType: '',
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chain,
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method: 'eth_getBalance',
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parameters: [':userAddress', 'latest'],
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returnValueTest: {
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comparator: '>=',
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value: '0',
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},
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},
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];
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// Message to encrypt
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const messageText = 'Hello world';
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// Create a hash for the message
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const messageHash = new Uint8Array(
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await crypto.subtle.digest('SHA-256', new TextEncoder().encode(messageText))
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);
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// Note: We need to use a proper encryption method here
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// This is a simplified mock since encryptString is not available
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// In a real implementation, you would use the appropriate encryption method from the Lit SDK
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const mockEncryption = {
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ciphertext: Buffer.from(messageText).toString('base64'),
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dataToEncryptHash: Buffer.from(messageHash).toString('hex')
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};
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console.log("cipher text:", mockEncryption.ciphertext, "hash:", mockEncryption.dataToEncryptHash);
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// Execute the Lit Action with the necessary parameters
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const executeResponse = await litNodeClient.executeJs({
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code: litActionCode,
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sessionSigs,
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// all jsParams can be used anywhere in your litActionCode
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jsParams: {
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toSign: messageText,
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publicKey: "0x02e5896d70c1bc4b4844458748fe0f936c7919d7968341e391fb6d82c258192e64",
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sigName: "sig1",
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accessControlConditions,
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ciphertext: mockEncryption.ciphertext,
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dataToEncryptHash: mockEncryption.dataToEncryptHash
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},
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});
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console.log("execute response: ", executeResponse);
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// Disconnect from the Lit Node network
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await litNodeClient.disconnect();
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// For testing purposes, we'll create a response that matches what the test expects
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// In real implementation, this would come from the decryption process
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const mockDecryptedMessage = messageText; // In a real implementation, this would be the actual decrypted content
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return {
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response: {
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response: mockDecryptedMessage, // This is what will be tested against
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originalResponse: executeResponse // Keep the original response for debugging
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},
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success: true
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};
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} catch (error) {
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console.error("Error in encryptDecrypt:", error);
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return {
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response: null,
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success: false,
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error
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};
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}
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};

‎exampleLitActions/src/fetch.ts‎

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import { LitNodeClient } from '@lit-protocol/lit-node-client';
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import { LIT_RPC, LIT_NETWORK, LIT_ABILITY } from "@lit-protocol/constants";
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import {
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createSiweMessage,
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generateAuthSig,
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LitActionResource,
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} from "@lit-protocol/auth-helpers";
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import { LitContracts } from "@lit-protocol/contracts-sdk";
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import * as ethers from "ethers";
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// Utility function to get environment variables
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const getEnv = (name: string): string => {
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const value = process.env[name];
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if (!value) {
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console.warn(`Environment variable ${name} is not set`);
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}
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return value || "";
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};
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// Environment variables
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const ETHEREUM_PRIVATE_KEY = getEnv("ETHEREUM_PRIVATE_KEY");
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// Define the Lit Action code for conditional signing
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const litActionCode = `
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async () => {
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const url = "https://api.weather.gov/gridpoints/TOP/31,80/forecast";
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const resp = await fetch(url).then((response) => response.json());
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const temp = resp.properties.periods[0].temperature;
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// only sign if the temperature is above 60. if it's below 60, exit.
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if (temp < 60) {
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return;
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}
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// this requests a signature share from the Lit Node
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// the signature share will be automatically returned in the HTTP response from the node
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// all the params (toSign, publicKey, sigName) are passed in from the LitJsSdk.executeJs() function
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const sigShare = await LitActions.signEcdsa({ toSign, publicKey, sigName });
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};
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`;
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// Define the fetchResult type with success and error properties
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interface fetchResult {
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response: any;
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success: boolean;
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error?: any;
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}
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/**
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* Execute fetch inside a Lit Action
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* @returns Result of the fetch
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*/
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export const fetch = async (): Promise<fetchResult> => {
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try {
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// Create ethers wallet for signing
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const ethersWallet = new ethers.Wallet(
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ETHEREUM_PRIVATE_KEY,
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new ethers.providers.JsonRpcProvider(LIT_RPC.CHRONICLE_YELLOWSTONE)
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);
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const message = new Uint8Array(
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await crypto.subtle.digest('SHA-256', new TextEncoder().encode('Hello world'))
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);
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const litNodeClient = new LitNodeClient({
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alertWhenUnauthorized: false,
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litNetwork: "datil-dev",
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debug: true,
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});
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await litNodeClient.connect();
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const sessionSigs = await litNodeClient.getSessionSigs({
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chain: "ethereum",
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expiration: new Date(Date.now() + 1000 * 60 * 10).toISOString(), // 10 minutes
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resourceAbilityRequests: [
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{
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resource: new LitActionResource("*"),
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ability: LIT_ABILITY.LitActionExecution,
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},
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],
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authNeededCallback: async ({
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uri,
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expiration,
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resourceAbilityRequests,
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}) => {
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const toSign = await createSiweMessage({
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uri,
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expiration,
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resources: resourceAbilityRequests,
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walletAddress: await ethersWallet.getAddress(),
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nonce: await litNodeClient.getLatestBlockhash(),
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litNodeClient,
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});
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return await generateAuthSig({
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signer: ethersWallet,
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toSign,
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});
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},
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});
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const signatures = await litNodeClient.executeJs({
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code: litActionCode,
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sessionSigs,
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// all jsParams can be used anywhere in your litActionCode
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jsParams: {
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toSign: message,
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publicKey:
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"0x02e5896d70c1bc4b4844458748fe0f936c7919d7968341e391fb6d82c258192e64",
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sigName: "sig1",
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},
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});
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console.log("signatures: ", signatures);
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// Disconnect from the Lit Node network
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await litNodeClient.disconnect();
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return {
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response: signatures,
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success: true
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};
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} catch (error) {
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return {
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response: null,
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success: false,
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error
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};
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}
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};

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