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glitch003glitch003
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i think it should work
1 parent cfd12cf commit c418ae2

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‎.gitignore

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/**/*/node_modules
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/**/*/.env
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/**/*/.env
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.DS_Store

‎dynamic-oracle/browser/.env.example

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PKP_PUBLIC_KEY=

‎dynamic-oracle/browser/.gitignore

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.env
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.cache
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dist
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node_modules

‎dynamic-oracle/browser/README.md

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# Running this Example
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1. `yarn`
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2. `yarn start`
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3. Click the `Click Me` button
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4. Connect your wallet
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5. Sign a message to generate a SessionSig
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6. The PKP signed message will be in the JavaScript console

‎dynamic-oracle/browser/package.json

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{
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"name": "lit-action-using-fetch-browser",
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"version": "0.1.0",
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"description": "Example of executing a Lit Action that makes a API request using Fetch",
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"source": "src/index.html",
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"license": "MIT",
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"scripts": {
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"start": "parcel ./src/index.html"
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},
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"dependencies": {
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"@dotenvx/dotenvx": "^0.37.1",
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"@lit-protocol/auth-browser": "^6.2.2",
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"@lit-protocol/auth-helpers": "^6.2.2",
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"@lit-protocol/constants": "^6.2.2",
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"@lit-protocol/contracts-sdk": "^6.2.2",
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"@lit-protocol/lit-node-client": "^6.2.2",
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"ethers": "5.7.2"
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},
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"devDependencies": {
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"parcel-bundler": "^1.12.5"
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}
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}

‎dynamic-oracle/browser/src/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Lit Session Signature Example</title>
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</head>
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<body>
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<button id="myButton">Click Me</button>
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<script src="./index.js"></script>
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</body>
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</html>

‎dynamic-oracle/browser/src/index.js

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import { LitNodeClient } from "@lit-protocol/lit-node-client";
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import { LitNetwork } from "@lit-protocol/constants";
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import {
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createSiweMessageWithRecaps,
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generateAuthSig,
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LitAbility,
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LitActionResource,
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LitPKPResource,
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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 { disconnectWeb3 } from "@lit-protocol/auth-browser";
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import * as ethers from "ethers";
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import { litActionCode } from "./litAction";
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document.addEventListener("DOMContentLoaded", () => {
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document.getElementById("myButton").addEventListener("click", buttonClick);
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});
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async function buttonClick() {
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try {
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console.log("Clicked");
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const provider = new ethers.providers.Web3Provider(window.ethereum);
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await provider.send("eth_requestAccounts", []);
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const ethersSigner = provider.getSigner();
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console.log("Connected account:", await ethersSigner.getAddress());
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const litNodeClient = await getLitNodeClient();
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const sessionSigs = await getSessionSigs(litNodeClient, ethersSigner);
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console.log("Got Session Signatures!");
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const litActionSignatures = await litNodeClient.executeJs({
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sessionSigs,
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code: litActionCode,
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jsParams: {
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url: "https://api.weather.gov/gridpoints/TOP/31,80/forecast",
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publicKey: await getPkpPublicKey(),
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sigName: "sig",
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},
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});
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console.log("litActionSignatures: ", litActionSignatures);
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} catch (error) {
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console.error(error);
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} finally {
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disconnectWeb3();
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}
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}
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async function getLitNodeClient() {
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const litNodeClient = new LitNodeClient({
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litNetwork: LitNetwork.DatilDev,
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});
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console.log("Connecting litNodeClient to network...");
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await litNodeClient.connect();
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console.log("litNodeClient connected!");
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return litNodeClient;
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}
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async function getPkpPublicKey(ethersSigner) {
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if (
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process.env.PKP_PUBLIC_KEY !== undefined &&
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process.env.PKP_PUBLIC_KEY !== ""
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)
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return process.env.PKP_PUBLIC_KEY;
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const pkp = await mintPkp(ethersSigner);
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console.log("Minted PKP!", pkp);
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return pkp.publicKey;
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}
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async function mintPkp(ethersSigner) {
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console.log("Minting new PKP...");
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const litContracts = new LitContracts({
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signer: ethersSigner,
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network: LitNetwork.DatilDev,
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});
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await litContracts.connect();
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return (await litContracts.pkpNftContractUtils.write.mint()).pkp;
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}
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async function getSessionSigs(litNodeClient, ethersSigner) {
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console.log("Getting Session Signatures...");
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return litNodeClient.getSessionSigs({
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chain: "ethereum",
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expiration: new Date(Date.now() + 1000 * 60 * 60 * 24).toISOString(), // 24 hours
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resourceAbilityRequests: [
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{
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resource: new LitActionResource("*"),
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ability: LitAbility.LitActionExecution,
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},
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{
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resource: new LitPKPResource("*"),
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ability: LitAbility.PKPSigning,
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},
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],
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authNeededCallback: getAuthNeededCallback(litNodeClient, ethersSigner),
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});
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}
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function getAuthNeededCallback(litNodeClient, ethersSigner) {
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return async ({ resourceAbilityRequests, expiration, uri }) => {
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const toSign = await createSiweMessageWithRecaps({
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uri,
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expiration,
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resources: resourceAbilityRequests,
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walletAddress: await ethersSigner.getAddress(),
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nonce: await litNodeClient.getLatestBlockhash(),
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litNodeClient,
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});
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const authSig = await generateAuthSig({
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signer: ethersSigner,
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toSign,
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});
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return authSig;
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};
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}

‎dynamic-oracle/browser/src/litAction.js

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export const litActionCode = `
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(async () => {
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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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// add any other data you want to include in the signature here
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// like the user's identity, or a timestamp
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const messageToSign = { temp, url };
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const toSign = ethers.utils.arrayify(ethers.utils.keccak256(ethers.utils.toUtf8Bytes(JSON.stringify(messageToSign))));
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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 Lit.Actions.signEcdsa({ toSign, publicKey, sigName });
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Lit.Actions.setResponse({response: JSON.stringify({messageSigned: messageToSign})});
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})();
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`;

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