diff --git a/package-lock.json b/package-lock.json
index 0b140a7..fa756c0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -45,6 +45,12 @@
             "integrity": "sha512-/+CRPXpBDpo2RK9C68N3b2cOvO0Cf5B9aPijHsoDQTHivnGSObdOF2BRQOYjojWTDy6nQvMjmqRXIxH55VjxxA==",
             "dev": true
         },
+        "@types/classnames": {
+            "version": "2.2.9",
+            "resolved": "https://registry.npmjs.org/@types/classnames/-/classnames-2.2.9.tgz",
+            "integrity": "sha512-MNl+rT5UmZeilaPxAVs6YaPC2m6aA8rofviZbhbxpPpl61uKodfdQVsBtgJGTqGizEf02oW3tsVe7FYB8kK14A==",
+            "dev": true
+        },
         "@types/clean-css": {
             "version": "4.2.1",
             "resolved": "https://registry.npmjs.org/@types/clean-css/-/clean-css-4.2.1.tgz",
@@ -1101,6 +1107,11 @@
                 }
             }
         },
+        "classnames": {
+            "version": "2.2.6",
+            "resolved": "https://registry.npmjs.org/classnames/-/classnames-2.2.6.tgz",
+            "integrity": "sha512-JR/iSQOSt+LQIWwrwEzJ9uk0xfN3mTVYMwt1Ir5mUcSN6pU+V4zQFFaJsclJbPuAUQH+yfWef6tm7l1quW3C8Q=="
+        },
         "clean-css": {
             "version": "4.2.1",
             "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.2.1.tgz",
diff --git a/package.json b/package.json
index 2ffb265..e130977 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
         "build:text-app": "webpack --config src/apps/text-app/composer/webpack.config.ts"
     },
     "devDependencies": {
+        "@types/classnames": "^2.2.9",
         "@types/html-webpack-plugin": "^3.2.1",
         "@types/mini-css-extract-plugin": "^0.8.0",
         "@types/react": "^16.9.9",
@@ -32,6 +33,7 @@
         "@fortawesome/fontawesome-svg-core": "^1.2.25",
         "@fortawesome/free-solid-svg-icons": "^5.11.2",
         "@fortawesome/react-fontawesome": "^0.1.7",
+        "classnames": "^2.2.6",
         "fastify": "^2.10.0",
         "fastify-static": "^2.5.0",
         "react": "^16.10.2",
diff --git a/src/apps/text-app/composer/app.tsx b/src/apps/text-app/composer/app.tsx
index c3dcc0b..fb79ddb 100644
--- a/src/apps/text-app/composer/app.tsx
+++ b/src/apps/text-app/composer/app.tsx
@@ -2,6 +2,9 @@ import React, { FC, useState, useEffect } from 'react'
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { faEyeSlash } from '@fortawesome/free-solid-svg-icons'
 import { Communicator } from '../../../communicator'
+import classNames from 'classnames'
+import { ClassDictionary } from '../../../types'
+
 import '../../../styles/default.scss'
 
 interface Props {
@@ -12,11 +15,21 @@ const App: FC<Props> = ({ communicator }) => {
     const maxCharacters = 256
     const [content, setContent] = useState('')
     const [cover, setCover] = useState('')
+    const [posting, setPosting] = useState(false)
 
     const charactersLeft = maxCharacters - content.length
     const showCharactersLeft = charactersLeft < (maxCharacters / 2)
-    const showCharactersStyle = charactersLeft > (maxCharacters * 0.1) ? 'has-text-danger' : ''
-    const buttonStyle = 'button is-primary is-small' + (charactersLeft < 1 ? ' is-disabled' : '')
+    const buttonDisabled = charactersLeft < 1 || content.length === 0 || posting
+
+    const showCharactersStyle: ClassDictionary = {
+        'has-text-danger': charactersLeft < (maxCharacters * 0.1),
+    }
+
+    const buttonStyle: ClassDictionary = {
+        'button': true,
+        'is-primary': true,
+        'is-loading': posting,
+    }
 
     useEffect(() => {
         const init = async () => {
@@ -30,6 +43,21 @@ const App: FC<Props> = ({ communicator }) => {
         init()
     }, [])
 
+    const post = async () => {
+        if (!content.length) return
+
+        try {
+            setPosting(true)
+            await communicator.post(true, content, cover)
+            setContent('')
+            setCover('')
+        } catch (err) {
+            console.error('App Component: ', err)
+        }
+
+        setPosting(false)
+    }
+
     return (
         <div>
             <div className="field">
@@ -50,13 +78,13 @@ const App: FC<Props> = ({ communicator }) => {
             <nav className="level">
                 <div className="level-left">
                     <div className="level-item">
-                        {showCharactersLeft && <p className={showCharactersStyle}>{charactersLeft} Chars Left</p>}
+                        {showCharactersLeft && <p className={classNames(showCharactersStyle)}>{charactersLeft} Chars Left</p>}
                     </div>
                 </div>
 
                 <div className="level-right">
                     <div className="level-item">
-                        <button className={buttonStyle}>Post!</button>
+                        <button className={classNames(buttonStyle)} onClick={() => post()} disabled={buttonDisabled}>Post!</button>
                     </div>
                 </div>
             </nav>
diff --git a/src/communicator/index.ts b/src/communicator/index.ts
index 58ed287..fcfbe72 100644
--- a/src/communicator/index.ts
+++ b/src/communicator/index.ts
@@ -17,7 +17,7 @@ export interface OutgoingMessageData {
 }
 
 interface Listener {
-    resolve: (value: unknown) => void
+    resolve: (value?: MessageContent | PromiseLike<MessageContent>) => void
     reject: (reason: any) => void
     once: boolean
 }
@@ -71,7 +71,7 @@ export class Communicator {
                 publicKey: this.publicKey,
             }), this.origin)
 
-            return new Promise((resolve, reject) => {
+            return new Promise<MessageContent>((resolve, reject) => {
                 this.listeners[name] = {
                     resolve,
                     reject,
@@ -88,4 +88,13 @@ export class Communicator {
     async setHeight(height: number) {
         return this.postAndReceive('setHeight', { height })
     }
+
+    async post(visible: boolean, text?: string, cover?: string, data?: object) {
+        return this.postAndReceive('post', {
+            visible,
+            text,
+            cover,
+            data,
+        })
+    }
 }
diff --git a/src/types/index.ts b/src/types/index.ts
new file mode 100644
index 0000000..c87b774
--- /dev/null
+++ b/src/types/index.ts
@@ -0,0 +1,3 @@
+export interface ClassDictionary {
+    [name: string]: boolean
+}