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feat: preview #3

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merged 2 commits into from
Feb 7, 2024
Merged

feat: preview #3

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eecde11
feat: preview
tmm Feb 7, 2024
755a992
Merge branch 'main' into tmm/preview
jxom Feb 7, 2024
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Binary file modified bun.lockb
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3 changes: 3 additions & 0 deletions example/src/index.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,9 @@ app.frame('/', ({ untrustedData }) => {
<>
<Button>Apples</Button>
<Button>Oranges</Button>
<Button>{`Last index: ${
buttonIndex ? buttonIndex.toString() : 'none'
}`}</Button>
</>
),
}
Expand Down
192 changes: 174 additions & 18 deletions src/index.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,14 @@ import { type Context, Hono } from 'hono'
import { ImageResponse } from 'hono-og'
import { type JSXNode } from 'hono/jsx'
import { jsxRenderer } from 'hono/jsx-renderer'
import * as ed from '@noble/ed25519'
import { bytesToHex } from 'viem/utils'
import {
NobleEd25519Signer,
makeFrameAction,
Message,
FrameActionBody,
} from '@farcaster/core'

import {
type Frame,
Expand Down Expand Up @@ -30,34 +38,148 @@ type FrameReturnType = {
intents: JSX.Element
}

const renderer = jsxRenderer(
({ children }) => {
return (
<html lang="en">
<body>{children}</body>
</html>
)
},
{ docType: true },
)

export class Framework extends Hono {
frame(
path: string,
handler: (c: FrameContext) => FrameReturnType | Promise<FrameReturnType>,
) {
this.get(
'/preview',
jsxRenderer(
({ children }) => {
return (
<html lang="en">
<body>{children}</body>
</html>
)
},
{ docType: true },
),
)
this.get('/preview', renderer)
this.post('/preview', renderer)

this.get('/preview/*', async (c) => {
const baseUrl = c.req.url.replace('/preview', '')
const response = await fetch(baseUrl)
const html = await response.text()
const frame = htmlToFrame(html)
const text = await response.text()
const frame = htmlToFrame(text)
return c.render(
<div>
<img alt="Farcaster frame" src={frame.imageUrl} />
</div>,
<>
<FramePreview baseUrl={baseUrl} frame={frame} />
</>,
)
})

this.post('/preview', async (c) => {
const baseUrl = c.req.url.replace('/preview', '')

const formData = await c.req.formData()
const buttonIndex = parseInt(
typeof formData.get('buttonIndex') === 'string'
? (formData.get('buttonIndex') as string)
: '',
)
const inputText = formData.get('inputText')
? Buffer.from(formData.get('inputText') as string)
: undefined

const privateKeyBytes = ed.utils.randomPrivateKey()
// const publicKeyBytes = await ed.getPublicKeyAsync(privateKeyBytes)

// const key = bytesToHex(publicKeyBytes)
// const deadline = Math.floor(Date.now() / 1000) + 60 * 60 // now + hour
//
// const account = privateKeyToAccount(bytesToHex(privateKeyBytes))
// const requestFid = 1

// const signature = await account.signTypedData({
// domain: {
// name: 'Farcaster SignedKeyRequestValidator',
// version: '1',
// chainId: 10,
// verifyingContract: '0x00000000FC700472606ED4fA22623Acf62c60553',
// },
// types: {
// SignedKeyRequest: [
// { name: 'requestFid', type: 'uint256' },
// { name: 'key', type: 'bytes' },
// { name: 'deadline', type: 'uint256' },
// ],
// },
// primaryType: 'SignedKeyRequest',
// message: {
// requestFid: BigInt(requestFid),
// key,
// deadline: BigInt(deadline),
// },
// })

// const response = await fetch(
// 'https://api.warpcast.com/v2/signed-key-requests',
// {
// method: 'POST',
// headers: {
// 'Content-Type': 'application/json',
// },
// body: JSON.stringify({
// deadline,
// key,
// requestFid,
// signature,
// }),
// },
// )

const fid = 2
const castId = {
fid,
hash: new Uint8Array(
Buffer.from('0000000000000000000000000000000000000000', 'hex'),
),
}
const frameActionBody = FrameActionBody.create({
url: Buffer.from(baseUrl),
buttonIndex,
castId,
inputText,
})
const frameActionMessage = await makeFrameAction(
frameActionBody,
{ fid, network: 1 },
new NobleEd25519Signer(privateKeyBytes),
)

const message = frameActionMessage._unsafeUnwrap()
const response = await fetch(baseUrl, {
method: 'POST',
body: JSON.stringify({
untrustedData: {
buttonIndex,
castId: {
fid: castId.fid,
hash: bytesToHex(castId.hash),
},
fid,
inputText,
messageHash: bytesToHex(message.hash),
network: 1,
timestamp: message.data.timestamp,
url: baseUrl,
},
trustedData: {
messageBytes: Buffer.from(
Message.encode(message).finish(),
).toString('hex'),
},
}),
})
const text = await response.text()
// TODO: handle redirects
const frame = htmlToFrame(text)

return c.render(
<>
<FramePreview baseUrl={baseUrl} frame={frame} />
</>,
)
})

Expand Down Expand Up @@ -103,6 +225,40 @@ export class Framework extends Hono {
////////////////////////////////////////////////////////////////////////
// Components

type FramePreviewProps = {
baseUrl: string
frame: Frame
}

function FramePreview({ baseUrl, frame }: FramePreviewProps) {
return (
<div>
<form action="/preview" method="post">
<input type="hidden" name="action" value={frame.postUrl} />
<div>
<img alt={frame.title ?? 'Farcaster frame'} src={frame.imageUrl} />
<div>{new URL(baseUrl).host}</div>
</div>
{/* TODO: Text input */}
{frame.buttons && (
<div>
{frame.buttons.map((button) => (
<button
key={button.index}
type="submit"
name="buttonIndex"
value={button.index}
>
{button.title}
</button>
))}
</div>
)}
</form>
</div>
)
}

export type ButtonProps = {
children: string
}
Expand Down
5 changes: 4 additions & 1 deletion src/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,10 @@
"hono": "^3"
},
"dependencies": {
"@farcaster/core": "^0.13.7",
"@noble/ed25519": "^2.0.0",
"happy-dom": "^13.3.8",
"hono-og": "~0.0.2"
"hono-og": "~0.0.2",
"viem": "^2.7.6"
}
}
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