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packages/chain-ethereum: add sign in with farcaster (#438)
* add siwfsigner, verify fc message to farcasterSignerAddress * use requestId to encode canvas pubkey, update siwf message encoding, add integration test for siwf verification * examples/chat: prototype siwf login to chat example * add static methods for generating requestId, update fixtures, tests pass * fix parsing of delegate did, return custody address * workaround for creating messages * examples/chat: default back to burner wallet * examples/chat: handle signer switching * factor out newSIWFSession * add eip712signer to chat * sync fixes: add eip712signer and siwfsigner to cli, add siwfsigner to chat init
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| import "@farcaster/auth-kit/styles.css" | ||
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| import React, { useContext, useEffect, useRef, useState } from "react" | ||
| import { hexlify, getBytes } from "ethers" | ||
| import { SIWFSigner } from "@canvas-js/chain-ethereum" | ||
| import { ed25519 } from "@canvas-js/signatures" | ||
| import { SignInButton, useProfile } from "@farcaster/auth-kit" | ||
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| import { topic } from "../App.js" | ||
| import { AppContext } from "../AppContext.js" | ||
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| export interface ConnectSIWFProps {} | ||
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| export const ConnectSIWF: React.FC<ConnectSIWFProps> = ({}) => { | ||
| const { app, setSessionSigner, setAddress } = useContext(AppContext) | ||
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| const profile = useProfile() | ||
| const { | ||
| isAuthenticated, | ||
| profile: { fid, displayName, custody, verifications }, | ||
| } = profile | ||
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| const [error, setError] = useState<Error | null>(null) | ||
| const [requestId, setRequestId] = useState<string | null>(null) | ||
| const [privateKey, setPrivateKey] = useState<string | null>(null) | ||
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| const initialRef = useRef(false) | ||
| useEffect(() => { | ||
| if (initialRef.current) { | ||
| return | ||
| } | ||
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| initialRef.current = true | ||
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| const { requestId, privateKey } = SIWFSigner.newSIWFRequestId(topic) | ||
| setRequestId(requestId) | ||
| setPrivateKey(hexlify(privateKey)) | ||
| }, []) | ||
|
|
||
| if (error !== null) { | ||
| return ( | ||
| <div className="p-2 border rounded bg-red-100 text-sm"> | ||
| <code>{error.message}</code> | ||
| </div> | ||
| ) | ||
| } else if (!privateKey || !requestId || !app) { | ||
| return ( | ||
| <div className="p-2 border rounded bg-gray-200"> | ||
| <button disabled>Loading...</button> | ||
| </div> | ||
| ) | ||
| } else { | ||
| return ( | ||
| <div style={{ marginTop: "12px", right: "12px" }}> | ||
| {isAuthenticated && ( | ||
| <div> | ||
| <p> | ||
| Hello, {displayName}! Your FID is {fid}. | ||
| </p> | ||
| <p>Your custody address is: </p> | ||
| <pre>{custody}</pre> | ||
| <p>Your connected signers: </p> | ||
| {verifications?.map((v, i) => <pre key={i}>{v}</pre>)} | ||
| </div> | ||
| )} | ||
| <SignInButton | ||
| requestId={requestId} | ||
| onSuccess={async (result) => { | ||
| const { signature, message } = result | ||
| if (!message || !signature) { | ||
| setError(new Error("login succeeded but did not return a valid SIWF message")) | ||
| return | ||
| } | ||
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| const { authorizationData, topic, custodyAddress } = SIWFSigner.parseSIWFMessage(message, signature) | ||
| const signer = new SIWFSigner({ custodyAddress, privateKey: privateKey.slice(2) }) | ||
| const address = await signer.getDid() | ||
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| const timestamp = new Date(authorizationData.siweIssuedAt).valueOf() | ||
| const { payload, signer: delegateSigner } = await signer.newSIWFSession( | ||
| topic, | ||
| authorizationData, | ||
| timestamp, | ||
| getBytes(privateKey), | ||
| ) | ||
| setAddress(address) | ||
| setSessionSigner(signer) | ||
| app.updateSigners([ | ||
| signer, | ||
| ...app.signers.getAll().filter((signer) => signer.key !== "chain-ethereum-farcaster"), | ||
| ]) | ||
| app.messageLog.append(payload, { signer: delegateSigner }) | ||
| console.log("started SIWF chat session", authorizationData) | ||
| }} | ||
| onError={(...args) => { | ||
| console.log("received SIWF error", args) | ||
| }} | ||
| onSignOut={(...args) => { | ||
| setAddress(null) | ||
| setSessionSigner(null) | ||
| }} | ||
| /> | ||
| </div> | ||
| ) | ||
| } | ||
| } |
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