commit 8312d9ece7a046dc9e3263e43e9f448169e8d38c
Author: fiatjaf <fiatjaf@gmail.com>
Date:   Wed Feb 9 19:40:45 2022 -0300

    initial version with basic event utils.

diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 0000000..7cad130
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,147 @@
+{
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "sourceType": "module",
+    "allowImportExportEverywhere": false
+  },
+
+  "env": {
+    "es6": true,
+    "node": true
+  },
+
+  "plugins": [
+    "react",
+    "babel"
+  ],
+
+  "globals": {
+    "document": false,
+    "navigator": false,
+    "window": false,
+    "location": false,
+    "URL": false,
+    "URLSearchParams": false,
+    "fetch": false,
+    "EventSource": false,
+    "localStorage": false,
+    "sessionStorage": false
+  },
+
+  "rules": {
+    "react/jsx-uses-vars": 2,
+    "react/jsx-no-undef": 2,
+    "react/jsx-uses-react": 2,
+    "accessor-pairs": 2,
+    "arrow-spacing": [2, { "before": true, "after": true }],
+    "block-spacing": [2, "always"],
+    "brace-style": [2, "1tbs", { "allowSingleLine": true }],
+    "comma-dangle": 0,
+    "comma-spacing": [2, { "before": false, "after": true }],
+    "comma-style": [2, "last"],
+    "constructor-super": 2,
+    "curly": [0, "multi-line"],
+    "dot-location": [2, "property"],
+    "eol-last": 2,
+    "eqeqeq": [2, "allow-null"],
+    "generator-star-spacing": [2, { "before": true, "after": true }],
+    "handle-callback-err": [2, "^(err|error)$" ],
+    "indent": 0,
+    "jsx-quotes": [2, "prefer-double"],
+    "key-spacing": [2, { "beforeColon": false, "afterColon": true }],
+    "keyword-spacing": [2, { "before": true, "after": true }],
+    "new-cap": 0,
+    "new-parens": 0,
+    "no-array-constructor": 2,
+    "no-caller": 2,
+    "no-class-assign": 2,
+    "no-cond-assign": 2,
+    "no-const-assign": 2,
+    "no-control-regex": 0,
+    "no-debugger": 0,
+    "no-delete-var": 2,
+    "no-dupe-args": 2,
+    "no-dupe-class-members": 2,
+    "no-dupe-keys": 2,
+    "no-duplicate-case": 2,
+    "no-empty-character-class": 2,
+    "no-empty-pattern": 2,
+    "no-eval": 0,
+    "no-ex-assign": 2,
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-extra-boolean-cast": 2,
+    "no-extra-parens": [2, "functions"],
+    "no-fallthrough": 2,
+    "no-floating-decimal": 2,
+    "no-func-assign": 2,
+    "no-implied-eval": 2,
+    "no-inner-declarations": [0, "functions"],
+    "no-invalid-regexp": 2,
+    "no-irregular-whitespace": 2,
+    "no-iterator": 2,
+    "no-label-var": 2,
+    "no-labels": [2, { "allowLoop": false, "allowSwitch": false }],
+    "no-lone-blocks": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-multi-spaces": 2,
+    "no-multi-str": 2,
+    "no-multiple-empty-lines": [2, { "max": 2 }],
+    "no-native-reassign": 2,
+    "no-negated-in-lhs": 2,
+    "no-new": 0,
+    "no-new-func": 2,
+    "no-new-object": 2,
+    "no-new-require": 2,
+    "no-new-symbol": 2,
+    "no-new-wrappers": 2,
+    "no-obj-calls": 2,
+    "no-octal": 2,
+    "no-octal-escape": 2,
+    "no-path-concat": 0,
+    "no-proto": 2,
+    "no-redeclare": 2,
+    "no-regex-spaces": 2,
+    "no-return-assign": 0,
+    "no-self-assign": 2,
+    "no-self-compare": 2,
+    "no-sequences": 2,
+    "no-shadow-restricted-names": 2,
+    "no-spaced-func": 2,
+    "no-sparse-arrays": 2,
+    "no-this-before-super": 2,
+    "no-throw-literal": 2,
+    "no-trailing-spaces": 2,
+    "no-undef": 2,
+    "no-undef-init": 2,
+    "no-unexpected-multiline": 2,
+    "no-unneeded-ternary": [2, { "defaultAssignment": false }],
+    "no-unreachable": 2,
+    "no-unused-vars": [2, { "vars": "local", "args": "none", "varsIgnorePattern": "^_"}],
+    "no-useless-call": 2,
+    "no-useless-constructor": 2,
+    "no-with": 2,
+    "one-var": [0, { "initialized": "never" }],
+    "operator-linebreak": [2, "after", { "overrides": { "?": "before", ":": "before" } }],
+    "padded-blocks": [2, "never"],
+    "quotes": [2, "single", { "avoidEscape": true, "allowTemplateLiterals": true }],
+    "semi": [2, "never"],
+    "semi-spacing": [2, { "before": false, "after": true }],
+    "space-before-blocks": [2, "always"],
+    "space-before-function-paren": 0,
+    "space-in-parens": [2, "never"],
+    "space-infix-ops": 2,
+    "space-unary-ops": [2, { "words": true, "nonwords": false }],
+    "spaced-comment": 0,
+    "template-curly-spacing": [2, "never"],
+    "use-isnan": 2,
+    "valid-typeof": 2,
+    "wrap-iife": [2, "any"],
+    "yield-star-spacing": [2, "both"],
+    "yoda": 0,
+    "no-unsafe-optional-chaning": 0
+  }
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..70a6f25
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+node_modules
+public/app.js
+yarn.lock
diff --git a/.prettierrc.yaml b/.prettierrc.yaml
new file mode 100644
index 0000000..e31d792
--- /dev/null
+++ b/.prettierrc.yaml
@@ -0,0 +1,9 @@
+arrowParens: avoid
+bracketSpacing: false
+jsxBracketSameLine: false
+printWidth: 80
+proseWrap: preserve
+semi: false
+singleQuote: true
+trailingComma: none
+useTabs: false
diff --git a/app.jsx b/app.jsx
new file mode 100644
index 0000000..0a8a0d8
--- /dev/null
+++ b/app.jsx
@@ -0,0 +1,53 @@
+import React, {useState} from 'react'
+import {render} from 'react-dom'
+
+import Nothing from './handlers/Nothing'
+import EventSigning from './handlers/EventSigning'
+
+const handlers = [EventSigning, Nothing]
+
+function App() {
+  let [value, setValue] = useState(null)
+
+  let Result
+  for (let i = 0; i < handlers.length; i++) {
+    let alt = handlers[i]
+    if (alt.match(value)) {
+      Result = alt
+      break
+    }
+  }
+
+  return (
+    <main style={{fontFamily: 'monospace'}}>
+      <div
+        style={{
+          width: '90%',
+          margin: 'auto'
+        }}
+      >
+        <h1>nostr army knife</h1>
+        paste something nostric
+        <textarea
+          onChange={e => setValue(e.target.value)}
+          style={{
+            padding: '7px',
+            width: '100%',
+            minHeight: '200px'
+          }}
+        />
+      </div>
+      <hr style={{margin: '18px 0'}} />
+      <div
+        style={{
+          width: '90%',
+          margin: 'auto'
+        }}
+      >
+        <Result value={value} />
+      </div>
+    </main>
+  )
+}
+
+render(<App />, document.getElementById('app'))
diff --git a/build.js b/build.js
new file mode 100755
index 0000000..63a78f6
--- /dev/null
+++ b/build.js
@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+
+const esbuild = require('esbuild')
+const alias = require('esbuild-plugin-alias')
+const nodeGlobals = require('@esbuild-plugins/node-globals-polyfill').default
+
+const prod = process.argv.indexOf('prod') !== -1
+
+esbuild
+  .build({
+    bundle: true,
+    entryPoints: ['app.jsx'],
+    outdir: 'public',
+    plugins: [
+      alias({
+        stream: require.resolve('readable-stream')
+      }),
+      nodeGlobals({buffer: true})
+    ],
+    sourcemap: prod ? false : 'inline',
+    define: {
+      window: 'self',
+      global: 'self'
+    }
+  })
+  .then(() => console.log('build success.'))
diff --git a/components/item.jsx b/components/item.jsx
new file mode 100644
index 0000000..31567d5
--- /dev/null
+++ b/components/item.jsx
@@ -0,0 +1,17 @@
+import React from 'react'
+
+export default function Item({label, children}) {
+  return (
+    <div
+      style={{
+        marginBottom: '9px',
+        whiteSpace: 'pre-wrap',
+        wordWrap: 'break-word',
+        wordBreak: 'break-all'
+      }}
+    >
+      <b>{label}: </b>
+      {children}
+    </div>
+  )
+}
diff --git a/handlers/EventSigning.jsx b/handlers/EventSigning.jsx
new file mode 100644
index 0000000..ffe7dc3
--- /dev/null
+++ b/handlers/EventSigning.jsx
@@ -0,0 +1,27 @@
+import React from 'react'
+import {getEventHash, serializeEvent} from 'nostr-tools'
+
+import Item from '../components/item'
+
+export default function EventSigning({value}) {
+  let evt = JSON.parse(value)
+
+  return (
+    <>
+      <Item label="serialized event">{serializeEvent(evt)}</Item>
+      <Item label="event id" hint="sha256 hash of serialized">
+        {getEventHash(evt)}
+      </Item>
+    </>
+  )
+}
+
+EventSigning.match = value => {
+  try {
+    let evt = JSON.parse(value)
+    return evt.kind && evt.content && evt.tags
+  } catch (err) {
+    /**/
+  }
+  return false
+}
diff --git a/handlers/Nothing.jsx b/handlers/Nothing.jsx
new file mode 100644
index 0000000..c8c52ae
--- /dev/null
+++ b/handlers/Nothing.jsx
@@ -0,0 +1,28 @@
+import React from 'react'
+
+export default function Nothing() {
+  return (
+    <>
+      you can paste
+      <ul>
+        <li>an unsigned event to be hashed and signed</li>
+        <li>a signed event to have its signature checked</li>
+        <li>a nostr relay URL to be inspected</li>
+        <li>a nostr event id we'll try to fetch</li>
+        <li>a nip05 identifier to be checked</li>
+        <li>
+          contribute a new function:{' '}
+          <a
+            target="_blank"
+            style={{color: 'inherit'}}
+            href="https://github.com/fiatjaf/nostr-utils-web"
+          >
+            _______
+          </a>
+        </li>
+      </ul>
+    </>
+  )
+}
+
+Nothing.match = () => true
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..80feb18
--- /dev/null
+++ b/package.json
@@ -0,0 +1,15 @@
+{
+  "dependencies": {
+    "@esbuild-plugins/node-globals-polyfill": "^0.1.1",
+    "esbuild": "^0.14.21",
+    "esbuild-plugin-alias": "^0.2.1",
+    "events": "^3.3.0",
+    "nostr-tools": "^0.21.4",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
+  },
+  "scripts": {
+    "build": "./build.js prod",
+    "watch": "ag -l --js | entr ./build.js"
+  }
+}
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..32b2b0a
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,4 @@
+<meta charset="utf-8" />
+<title>nostr utils</title>
+<div id="app" />
+<script src="app.js"></script>