feat: init commit

.eslintrc.cjs

@@ -0,0 +1,16 @@
+module.exports = {
+    root: true,
+    parser: "@typescript-eslint/parser",
+    extends: [
+        "eslint:recommended",
+        "plugin:@typescript-eslint/recommended",
+        "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    ],
+    plugins: ["@typescript-eslint"],
+    parserOptions: {
+        project: ["./tsconfig.json"]
+    },
+    rules: {
+        "@typescript-eslint/no-explicit-any": 1
+    }
+  }

.gitignore

@@ -0,0 +1,25 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+.env*
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

.prettierrc

@@ -0,0 +1,7 @@
+{
+    "printWidth": 100,
+    "singleQuote": false,
+    "semi": false,
+    "trailingComma": "all",
+    "endOfLine": "lf"
+  }

README.md

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+# Sendstr-web
+
+Sendstr is an e2e encrypted shared clipboard web app powered by Nostr.
+
+The main motivation to build Sendstr was to provide a quick and easy way to transfer text and files (coming soon) between devices. Sendstr defaults to a self-hosted Nostr relay but can easily be configured to point elsewhere.
+
+## Build
+`cd sendstr-web`
+`npm i`
+`npm run export`
+
+Then copy the contents of `./out` to your favorite static content host.
+
+## License
+
+Distributed under the MIT License. See [LICENSE file](LICENSE).

global.d.ts

@@ -0,0 +1,65 @@
+declare module "remark-html" {
+  const html: any
+  export default html
+}
+
+declare module "nostr-tools" {
+  export const generatePrivateKey: () => string
+  export const getPublicKey: (priv: string) => string
+  export const relayPool: () => {
+    setPrivateKey: (priv: string) => void
+    addRelay: (url: string, { read: boolean, write: boolean }) => void
+    publish: ({pubkey, created_at, kind, tags, content}: {
+      pubkey: string,
+      created_at: number,
+      kind: number,
+      tags: [[string,string]],
+      content: string,
+    }) => Promise<void>,
+    sub: ({
+      cb,
+      filter,
+    }: {
+      cb: (event: {
+        content: string
+        created_at: number
+        id: string
+        kind: number
+        pubkey: string
+        message: string
+        sig: string
+        tags: [[string, string]]
+      }) => Promise<void>
+      filter: Record<string, string[]>[]
+    }) => {
+      unsub: () => void
+    }
+  }
+}
+
+declare module "nostr-tools/nip04" {
+  export const decrypt: (priv: string, pub: string, message: string) => string
+  export const encrypt: (priv: string, pub: string, message: string) => string
+}
+declare module "toastify-js" {
+  const Toastify: ({
+    text,
+    duration,
+    close,
+    gravity,
+    position,
+    stopOnFocus,
+    className,
+  }: {
+    text: string
+    duration: number
+    close: boolean
+    gravity: string
+    position: string
+    stopOnFocus: boolean
+    className: string
+  }) => {
+    showToast: () => void
+  }
+  export = Toastify
+}

next-env.d.ts

@@ -0,0 +1,5 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.

next.config.js

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+/** @type {import('next').NextConfig} */
+const withPWA = require('next-pwa')
+const runtimeCaching = require('next-pwa/cache')
+
+module.exports = withPWA({
+  pwa: {
+    dest: 'public',
+    runtimeCaching,
+  },
+})

package.json

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+{
+  "name": "sendstr-web",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "export": "rm -rf out/ && next build && next export",
+    "serve": "browser-sync start --server out --no-open --https --no-snippet",
+    "lint": "npx eslint \"src/**/*.@(tsx|ts|jsx|js)\" --fix",
+    "format": "npx prettier --write \"src/**/*.@(tsx|ts|jsx|js)\""
+  },
+  "dependencies": {
+    "@zxing/browser": "^0.1.1",
+    "date-fns": "^2.11.1",
+    "gray-matter": "^4.0.2",
+    "next": "latest",
+    "next-pwa": "^5.5.4",
+    "nostr-tools": "^0.23.3",
+    "qrcode.react": "^3.0.2",
+    "react": "17.0.2",
+    "react-device-detect": "^2.2.2",
+    "react-dom": "17.0.2",
+    "react-icons": "^4.4.0",
+    "remark": "^14.0.1",
+    "remark-html": "^15.0.0",
+    "toastify-js": "^1.11.2"
+  },
+  "devDependencies": {
+    "@types/node": "^16.3.3",
+    "@types/react": "^17.0.14",
+    "@typescript-eslint/eslint-plugin": "^5.29.0",
+    "@typescript-eslint/parser": "^5.29.0",
+    "autoprefixer": "^10.4.7",
+    "browser-sync": "^2.27.10",
+    "eslint": "^8.18.0",
+    "postcss": "^8.4.14",
+    "prettier": "^2.7.1",
+    "tailwindcss": "^3.1.3",
+    "typescript": "^4.3.5"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/vilm3r/sendstr-web.git"
+  },
+  "keywords": [
+    "nostr",
+    "nextjs"
+  ],
+  "author": "vilm3r",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/vilm3r/sendstr-web/issues"
+  },
+  "homepage": "https://sendstr.com"
+}

postcss.config.js

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+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

public/manifest.json

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+{
+  "short_name": "Sendstr",
+  "name": "Sendstr: secure clipboard sharing",
+  "icons": [
+    {
+      "src": "/android-chrome-192x192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "/android-chrome-512x512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": "/",
+  "background_color": "#3367D6",
+  "display": "standalone",
+  "scope": "/",
+  "theme_color": "#3367D6",
+  "description": "Sendstr is an open source end-to-end encrypted shared clipboard app built on top of Nostr. No login needed, new throwaway encryption keys are generated on page load."
+}

public/robots.txt

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+User-agent: *
+Allow: /index.html
+Sitemap: https://sendstr.com/sitemap.xml

public/sitemap.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://sendstr.com/</loc>
+  </url>
+    <url>
+    <loc>https://sendstr.com/settings</loc>
+  </url>
+</urlset>

src/components/button/index.tsx

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+type ButtonProps = {
+  onClick: () => void
+  children: React.ReactNode
+  disabled?: boolean
+  className?: string
+}
+
+export const Button = ({ children, disabled, onClick, className }: ButtonProps) => {
+  return (
+    <div className={className}>
+      <button
+        className="bg-custom-black rounded-md px-6 py-3 w-full h-full shadow"
+        onClick={onClick}
+        disabled={disabled}
+      >
+        {children}
+      </button>
+    </div>
+  )
+}

src/components/card/index.tsx

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+interface CardProps {
+  children: React.ReactNode
+}
+
+export const Card = ({ children }: CardProps) => {
+  return <div className="bg-custom-green-light rounded-xl shadow-md">{children}</div>
+}

src/components/header/index.tsx

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+import React from "react"
+import { DiGithubBadge } from "react-icons/di"
+import { MdSettings } from "react-icons/md"
+import Link from "next/link"
+
+export function Header() {
+  return (
+    <header className="bg-custom-green-light mb-5 mx-auto border-0 rounded-xl p-4 shadow-md">
+      <div className="container flex justify-between items-center">
+        <a href="/" className="py-1.5 mr-4 text-lg cursor-pointer">
+          <h1 className="text-xl">Sendstr</h1>
+        </a>
+        <div className="flex items-center space-x-3">
+          {/* <Link
+          href="/faq"
+          className="text-lg cursor-pointer"
+        >FAQ
+        </Link> */}
+          <a href="https://github.com/vilm3r/sendstr-web">
+            <DiGithubBadge className="inline text-3xl" title="Github" />
+          </a>
+          <Link href="/settings">
+            <div className="cursor-pointer">
+              <MdSettings className="inline text-2xl" title="Settings" />
+            </div>
+          </Link>
+        </div>
+      </div>
+    </header>
+  )
+}

src/components/icon-button/index.tsx

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+import { forwardRef, LegacyRef } from "react"
+
+type IconButtonProps = {
+  onClick: () => void
+  children: React.ReactNode
+  className?: string
+}
+
+export const IconButton = forwardRef(
+  (
+    { children, onClick, className }: IconButtonProps,
+    ref: LegacyRef<HTMLButtonElement> | undefined,
+  ) => {
+    return (
+      <div className={className}>
+        <button
+          ref={ref}
+          className="bg-custom-black w-full h-full rounded-lg flex justify-center items-center"
+          onClick={onClick}
+        >
+          {children}
+        </button>
+      </div>
+    )
+  },
+)

src/components/input/index.tsx

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+import { ChangeEvent, forwardRef, LegacyRef } from "react"
+
+export interface InputProps {
+  onChange?: (e: ChangeEvent<HTMLInputElement> | undefined) => void
+  value?: string
+  placeholder?: string
+  className?: string
+}
+
+export const Input = forwardRef(
+  (
+    { onChange, value, placeholder, className }: InputProps,
+    ref: LegacyRef<HTMLInputElement> | undefined,
+  ) => {
+    return (
+      <div className={className}>
+        <input
+          className="bg-custom-green-dark border-2 border-custom-black rounded w-full p-3"
+          ref={ref}
+          value={value}
+          onChange={onChange}
+          placeholder={placeholder}
+        />
+      </div>
+    )
+  },
+)

src/components/qr-reader/index.tsx

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+import { BrowserQRCodeReader, IScannerControls } from "@zxing/browser"
+import { useEffect, useRef } from "react"
+
+export const QrReader = ({ onResult }: { onResult: (result: string) => void }) => {
+  const controlsRef = useRef<IScannerControls | null>(null)
+
+  const constraints = {
+    video: {
+      facingMode: {
+        ideal: "environment",
+      },
+    },
+  }
+
+  useEffect(() => {
+    const reader = new BrowserQRCodeReader(undefined, {
+      delayBetweenScanAttempts: 300,
+    })
+
+    reader
+      .decodeFromConstraints(constraints, "video", (result, error, controls) => {
+        controlsRef.current = controls
+        if (result) {
+          controls.stop()
+          onResult(result.getText())
+        }
+      })
+      .catch(console.warn)
+    return () => controlsRef?.current?.stop()
+  }, [])
+
+  return <video id="video"></video>
+}

src/components/toggle/index.tsx

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+type ToggleProps = {
+  checked: boolean
+  onChange: () => void
+}
+
+export const Toggle = ({ checked, onChange }: ToggleProps) => {
+  return (
+    <label>
+      <input
+        type="checkbox"
+        className="absolute overflow-hidden whitespace-nowrap h-[1px] w-[1px]"
+        checked={checked}
+        onChange={onChange}
+      />
+      <span className="bg-white border-2 border-custom-black rounded-3xl flex h-8 mr-[10px] relative w-16 cursor-pointer">
+        <span
+          className={`flex absolute left-[2px] bottom-[2px] justify-center h-6 w-6 rounded-full items-center transition ${
+            checked ? "bg-custom-black" : "translate-x-8 bg-custom-black/50"
+          }`}
+        ></span>
+      </span>
+    </label>
+  )
+}

src/lib/localStorage.ts

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+export type SettingsRelay = {
+  url: string
+  enabled: boolean
+}
+
+export const getRelays = (): SettingsRelay[] =>
+  JSON.parse(
+    window.localStorage.getItem("relays") ||
+      JSON.stringify([
+        {
+          url: "wss://relay.sendstr.com",
+          enabled: true,
+        },
+      ]),
+  ) as SettingsRelay[]
+
+export const setRelays = (relays: SettingsRelay[]) =>
+  window.localStorage.setItem("relays", JSON.stringify(relays))
+
+export const addRelay = (relay: SettingsRelay) =>
+  window.localStorage.setItem("relays", JSON.stringify([...getRelays(), relay]))
+
+export const removeRelay = (relay: string) =>
+  window.localStorage.setItem("relays", JSON.stringify(getRelays().filter((x) => x.url !== relay)))
+
+export const toggleRelay = (relay: string) =>
+  window.localStorage.setItem(
+    "relays",
+    JSON.stringify(
+      getRelays().reduce((acc, x) => {
+        if (x.url === relay)
+          return [
+            ...acc,
+            {
+              url: x.url,
+              enabled: !x.enabled,
+            },
+          ]
+        return [...acc, x]
+      }, [] as SettingsRelay[]),
+    ),
+  )

src/lib/utils.ts

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+export const debounce = (callback: (...args: any[]) => void, wait: number) => {
+  let timeoutId: NodeJS.Timeout
+  return (...args: any) => {
+    clearTimeout(timeoutId)
+    timeoutId = setTimeout(() => {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+      callback(...args)
+    }, wait)
+  }
+}

src/pages/_app.tsx

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+import "../styles/global.css"
+import { AppProps } from "next/app"
+import { useEffect, useState } from "react"
+import { getRelays } from "../lib/localStorage"
+import { NostrEventType, NostrType } from "../types"
+
+export default function App({ Component, pageProps }: AppProps) {
+  const [events, setEvents] = useState<{ [k: string]: NostrEventType }>({})
+  const [nostr, setNostr] = useState<NostrType>({
+    priv: "",
+    pub: "",
+    pool: null,
+    sub: null,
+  })
+
+  const updateEvents = async (pub: string, priv: string, event: NostrEventType) => {
+    const { decrypt } = await import("nostr-tools/nip04")
+    try {
+      const p = event.tags.find(([tag]) => tag === "p") || ["p", ""]
+      const pubkey = event.pubkey === pub ? p[1] : event.pubkey
+      const message = decrypt(priv, pubkey, event.content)
+      setEvents({
+        ...events,
+        ...{
+          [event.id]: {
+            ...event,
+            message,
+          },
+        },
+      })
+    } catch (e) {
+      console.warn(e)
+    }
+  }
+
+  useEffect(() => {
+    let sub: {
+      unsub: () => void
+    }
+    void (async () => {
+      const { generatePrivateKey, relayPool, getPublicKey } = await import("nostr-tools")
+      const priv = generatePrivateKey()
+      const pub = getPublicKey(priv)
+      const pool = relayPool()
+      pool.setPrivateKey(priv)
+      const relays = getRelays()
+      relays.forEach(
+        (relay) => relay.enabled && pool.addRelay(relay.url, { read: true, write: true }),
+      )
+      sub = pool.sub({
+        cb: (event: NostrEventType) => updateEvents(pub, priv, event),
+        filter: [{ "#p": [pub] }],
+      })
+      setNostr({ priv, pub, pool, sub })
+    })()
+
+    return () => {
+      sub.unsub()
+    }
+  }, [])
+
+  const getLatestEvent = (events: Record<string, NostrEventType>) =>
+    Object.entries(events).reduce((acc, x) => {
+      if (acc === null) return x[1]
+      if (new Date(acc.created_at) < new Date(x[1].created_at)) return x[1]
+      return acc
+    }, null as NostrEventType | null)
+
+  return <Component {...{ ...pageProps, nostr, event: getLatestEvent(events) }} />
+}

src/pages/faq/index.tsx

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+export default function FAQ() {
+  return <></>
+}

src/pages/index.tsx

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+import React, { useState } from "react"
+import Head from "next/head"
+
+import { Header } from "../components/header"
+import { Button } from "../components/button"
+import { Card } from "../components/card"
+import { SendView } from "../views/send"
+import { ReceiveView } from "../views/receive"
+import { NostrEventType, NostrType } from "../types"
+
+type HomeProps = {
+  nostr: NostrType
+  event: NostrEventType
+}
+
+export default function Home({ nostr, event }: HomeProps) {
+  const [clientType, setClientType] = useState("")
+
+  const LandingView = () => (
+    <div className="max-w-[64rem] m-auto">
+      <Card>
+        <div className="p-10">
+          <h1 className="text-2xl text-bold pb-5">Open source e2e encrypted shared clipboard</h1>
+          <p className="pb-10">
+            Sendstr is an open source end-to-end encrypted shared clipboard app built on top of{" "}
+            <a className="underline" href="https://github.com/nostr-protocol/nostr" target="_blank">
+              Nostr
+            </a>
+            . No login needed, new throwaway encryption keys are generated on page load, and the
+            default relay deletes messages after 1 hour. To get started open this page on another
+            device and choose one of the options below.
+          </p>
+          <div className="flex w-full">
+            <Button className="w-1/2 px-4" onClick={() => setClientType("send")}>
+              Send
+            </Button>
+            <Button className="w-1/2 px-4" onClick={() => setClientType("receive")}>
+              Receive
+            </Button>
+          </div>
+        </div>
+      </Card>
+    </div>
+  )
+
+  const Page = () => {
+    switch (true) {
+      case clientType === "send":
+        return <SendView nostr={nostr} />
+      case clientType === "receive":
+        return <ReceiveView nostr={nostr} event={event} />
+      default:
+        return <LandingView />
+    }
+  }
+
+  return (
+    <>
+      <Head>
+        <title>Sendstr</title>
+        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
+        <meta
+          name="description"
+          content="Sendstr is an open source end-to-end encrypted shared clipboard app
+            built on top of Nostr. No login needed, new throwaway encryption keys are generated on
+            page load, and the default relay deletes messages after 1 hour."
+        />
+        <meta name="mobile-web-app-capable" content="yes" />
+      </Head>
+      <div className="bg-custom-green-dark min-h-screen">
+        <div className="p-5">
+          <div className="max-w-[80rem] mx-auto">
+            <Header />
+          </div>
+          <main>
+            <Page />
+          </main>
+        </div>
+      </div>
+    </>
+  )
+}

src/pages/settings/index.tsx

@@ -0,0 +1,101 @@
+import { createRef, useState } from "react"
+import { Button } from "../../components/button"
+import { Card } from "../../components/card"
+import { Header } from "../../components/header"
+import {
+  SettingsRelay,
+  getRelays,
+  addRelay,
+  toggleRelay,
+  removeRelay,
+} from "../../lib/localStorage"
+import { Input } from "../../components/input"
+import { MdDelete } from "react-icons/md"
+import { Toggle } from "../../components/toggle"
+import Head from "next/head"
+
+type SettingsState = {
+  relays: SettingsRelay[]
+}
+
+export default function Settings() {
+  const [settings, setSettings] = useState<SettingsState>({
+    relays: typeof window !== "undefined" ? getRelays() : [],
+  })
+  const newPool = createRef<HTMLInputElement>()
+
+  return (
+    <>
+      <Head>
+        <title>Sendstr - Settings</title>
+        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
+        <meta
+          name="description"
+          content="Sendstr is an open source end-to-end encrypted shared clipboard app
+            built on top of Nostr. No login needed, new throwaway encryption keys are generated on
+            page load, and the default relay deletes messages after 1 hour."
+        />
+      </Head>
+      <div className="bg-custom-green-dark min-h-screen">
+        <div className="p-5 max-w-[80rem] m-auto">
+          <Header />
+          <main className="max-w-[64rem] m-auto">
+            <Card>
+              <div className="max-w-[30rem] m-auto p-10">
+                <h2 className="text-2xl pb-5">Relays</h2>
+                <ul>
+                  {settings.relays.map((relay) => (
+                    <li key={relay.url}>
+                      <div className="m-auto flex items-center pb-3">
+                        <Toggle
+                          checked={relay.enabled}
+                          onChange={() => {
+                            toggleRelay(relay.url)
+                            setSettings({
+                              ...settings,
+                              relays: getRelays(),
+                            })
+                          }}
+                        />
+                        <label className="lg:text-lg flex-grow text-center p-2 truncate">
+                          {relay.url}
+                        </label>
+                        <button
+                          onClick={() => {
+                            removeRelay(relay.url)
+                            setSettings({
+                              ...settings,
+                              relays: getRelays(),
+                            })
+                          }}
+                        >
+                          <MdDelete className="text-2xl" />
+                        </button>
+                      </div>
+                    </li>
+                  ))}
+                </ul>
+                <Input className="pt-5" ref={newPool} placeholder="Relay url" />
+                <Button
+                  className="pt-5"
+                  onClick={() => {
+                    addRelay({
+                      url: newPool?.current?.value || "",
+                      enabled: true,
+                    })
+                    setSettings({
+                      ...settings,
+                      relays: getRelays(),
+                    })
+                  }}
+                >
+                  Add Relay
+                </Button>
+              </div>
+            </Card>
+          </main>
+        </div>
+      </div>
+    </>
+  )
+}

src/styles/global.css

@@ -0,0 +1,7 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+body {
+    color: #FFFFFF
+}

src/types.ts

@@ -0,0 +1,59 @@
+export type NostrSub = ({
+  cb,
+  filter,
+}: {
+  cb: (event: {
+    content: string
+    created_at: number
+    id: string
+    kind: number
+    pubkey: string
+    message: string
+    sig: string
+    tags: [[string, string]]
+  }) => Promise<void>
+  filter: Record<string, string[]>[]
+}) => {
+  unsub: () => void
+}
+
+export type NostrPublish = ({
+  pubkey,
+  created_at,
+  kind,
+  tags,
+  content,
+}: {
+  pubkey: string
+  created_at: number
+  kind: number
+  tags: [[string, string]]
+  content: string
+}) => Promise<void>
+
+export type NostrPool = {
+  setPrivateKey: (priv: string) => void
+  addRelay: (url: string, { read, write }: { read: boolean; write: boolean }) => void
+  sub: NostrSub
+  publish: NostrPublish
+}
+
+export type NostrType = {
+  priv: string
+  pub: string
+  pool: NostrPool | null
+  sub: {
+    unsub: () => void
+  } | null
+}
+
+export type NostrEventType = {
+  content: string
+  created_at: number
+  id: string
+  kind: number
+  pubkey: string
+  message: string
+  sig: string
+  tags: [[string, string]]
+}

src/views/receive/index.tsx

@@ -0,0 +1,75 @@
+import { QRCodeSVG } from "qrcode.react"
+import Toastify from "toastify-js"
+import { Button } from "../../components/button"
+import { Card } from "../../components/card"
+import { NostrEventType, NostrType } from "../../types"
+
+const Message = ({ event }: { event: NostrEventType }) => {
+  return (
+    <p className="bg-custom-green-dark border-2 border-custom-black rounded w-full p-3 whitespace-pre-wrap">
+      {event.message}
+    </p>
+  )
+}
+
+type ReceiveViewProps = {
+  nostr: NostrType
+  event: NostrEventType
+}
+
+export const ReceiveView = ({ nostr, event }: ReceiveViewProps) => {
+  return (
+    <div className="max-w-[64rem] m-auto">
+      <Card>
+        <div className="p-10">
+          <div className="flex flex-col lg:flex-row">
+            {!event && (
+              <div className="overflow-visible py-5 max-w-[20rem] mx-auto lg:pr-5">
+                <QRCodeSVG
+                  value={nostr.pub}
+                  level="H"
+                  bgColor="transparent"
+                  fgColor="#3C3744"
+                  includeMargin={false}
+                  width="100%"
+                  height="100%"
+                />
+              </div>
+            )}
+            <div className="flex flex-col items-center justify-center w-full">
+              <div>
+                <label className="flex flex-grow text-left">My pubkey:</label>
+                <div
+                  id="mypubkey"
+                  className="border-2 border-custom-black rounded-md p-2 bg-custom-green-dark break-all"
+                >
+                  {nostr.pub}
+                </div>
+                <div className="py-6 max-w-[20rem] m-auto">
+                  <Button
+                    onClick={() => {
+                      navigator.clipboard.writeText(nostr.pub).catch(console.warn)
+                      Toastify({
+                        text: "Pubkey copied",
+                        duration: 2000,
+                        close: false,
+                        gravity: "bottom",
+                        position: "center",
+                        stopOnFocus: false,
+                        className:
+                          "flex fixed bottom-0 bg-custom-black p-2 rounded left-[45%] z-50",
+                      }).showToast()
+                    }}
+                  >
+                    Copy Pubkey
+                  </Button>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div>{event && <Message event={event} />}</div>
+        </div>
+      </Card>
+    </div>
+  )
+}

src/views/scan/index.tsx

@@ -0,0 +1,20 @@
+import { MdClose } from "react-icons/md"
+import { QrReader } from "../../components/qr-reader"
+
+interface ScanViewProps {
+  close: () => void
+  onScan: (x: string) => void
+}
+
+export const ScanView = ({ close, onScan }: ScanViewProps) => {
+  return (
+    <div className="bg-black h-screen w-screen fixed top-0 left-0 z-50 flex justify-center">
+      <QrReader onResult={onScan} />
+      <div className="absolute text-black top-0 right-0">
+        <button className="bg-white rounded-3xl p-2 m-2" onClick={close}>
+          <MdClose size="1rem" />
+        </button>
+      </div>
+    </div>
+  )
+}

src/views/send/index.tsx

@@ -0,0 +1,118 @@
+import dynamic from "next/dynamic"
+
+import { useEffect, useRef, useState } from "react"
+import { isMobile } from "react-device-detect"
+import { Input } from "../../components/input"
+import { MdQrCodeScanner } from "react-icons/md"
+import { IconButton } from "../../components/icon-button"
+import { Card } from "../../components/card"
+import { debounce } from "../../lib/utils"
+import { NostrType } from "../../types"
+
+type MessageProps = {
+  message: string
+  onChange: (x: string) => void
+}
+
+const isValidPeerKey = (peerKey: string) => peerKey.length === 64
+
+const Message = ({ message, onChange }: MessageProps) => {
+  return (
+    <section className="p-4">
+      <div className="border-0">
+        <textarea
+          className="bg-custom-green-dark border-2 border-custom-black rounded w-full min-h-[100px] max-h-[700px]"
+          value={message}
+          onChange={(e) => onChange(e.currentTarget.value || "")}
+        />
+      </div>
+    </section>
+  )
+}
+
+type PeerInputProps = {
+  peerKey: string
+  onChange: (x: string) => void
+  setShowScan: (x: boolean) => void
+}
+
+const PeerInput = ({ peerKey, onChange, setShowScan }: PeerInputProps) => {
+  return (
+    <section className="mx-auto max-w-[40rem] p-4">
+      <label>Peer pubkey:</label>
+      <div className="relative">
+        <Input value={peerKey} onChange={(e) => onChange(e?.currentTarget?.value || "")} />
+        <div className="absolute right-0 top-0 h-full flex items-center">
+          <IconButton className="w-10 h-10 mr-2" onClick={() => setShowScan(true)}>
+            <div className="">
+              <MdQrCodeScanner width="100%" height="auto" />
+            </div>
+          </IconButton>
+        </div>
+      </div>
+    </section>
+  )
+}
+
+export type SendViewProps = {
+  nostr: NostrType
+}
+
+export const SendView = ({ nostr }: SendViewProps) => {
+  const [showScan, setShowScan] = useState(false)
+  const [peerKey, setPeerKey] = useState("")
+  const [message, setMessage] = useState("")
+
+  const ScanView = dynamic(async () => (await import("../scan")).ScanView)
+
+  useEffect(() => {
+    if (isMobile) {
+      setShowScan(true)
+    }
+  }, [])
+
+  const sendNostrMessage = useRef(
+    // eslint-disable-next-line @typescript-eslint/no-misused-promises
+    debounce(async (m: string, p: string, n: NostrType) => {
+      try {
+        const { encrypt } = await import("nostr-tools/nip04")
+        await n.pool?.publish({
+          pubkey: n.pub,
+          created_at: Math.round(Date.now() / 1000),
+          kind: 4,
+          tags: [["p", p]],
+          content: encrypt(n.priv, p, m),
+        })
+      } catch (e) {
+        console.warn(e)
+      }
+    }, 750),
+  ).current
+
+  const sendMessage = (message: string) => {
+    setMessage(message)
+    sendNostrMessage(message, peerKey, nostr)
+  }
+
+  return (
+    <div>
+      {showScan && (
+        <ScanView
+          close={() => setShowScan(false)}
+          onScan={(x: string) => {
+            setShowScan(false)
+            setPeerKey(x)
+          }}
+        />
+      )}
+      <div className="mx-auto max-w-[64rem] flex flex-col gap-5">
+        <Card>
+          <div className="p-4">
+            <PeerInput peerKey={peerKey} setShowScan={setShowScan} onChange={setPeerKey} />
+            {isValidPeerKey(peerKey) && <Message message={message} onChange={sendMessage} />}
+          </div>
+        </Card>
+      </div>
+    </div>
+  )
+}

tailwind.config.js

@@ -0,0 +1,18 @@
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+      "./pages/**/*.{js,ts,jsx,tsx}",
+      "./components/**/*.{js,ts,jsx,tsx}",
+      "./views/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        'custom-green-light': '#6b9370',
+        'custom-green-dark': '#4D6A51',
+        'custom-black': '#3C3744'
+      }
+    }
+  },
+  plugins: [],
+}

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "noImplicitAny": true
+  },
+  "exclude": ["node_modules"],
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"]
+}