0.5.3

show "upgrade" message on invalid connection request (#164 )
only use notify-send when present (#163 )
2024-12-17 17:20:21 +01:00 · 2021-12-24 11:36:04 +00:00 · 2021-12-24 11:12:08 +00:00 · 2021-12-20 12:24:28 +00:00 · 2021-12-19 15:43:39 +00:00 · 2021-12-19 15:25:19 +00:00
693 changed files with 9006 additions and 197246 deletions
@@ -0,0 +1 @@
+* @epoberezkin @efim-poberezkin
@@ -0,0 +1,2 @@
+github: simplex-chat
+open_collective: simplex-chat
@@ -0,0 +1,4 @@
+{
+  "template": "${{UNCATEGORIZED}}",
+  "pr_template": "- ${{TITLE}}\n"
+}
@@ -0,0 +1,101 @@
+name: build
+
+on:
+  push:
+    branches:
+      - master
+      - v4
+    tags:
+      - "v*"
+  pull_request:
+
+jobs:
+  prepare-release:
+    if: startsWith(github.ref, 'refs/tags/v')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone project
+        uses: actions/checkout@v2
+
+      - name: Build changelog
+        id: build_changelog
+        uses: mikepenz/release-changelog-builder-action@v1
+        with:
+          configuration: .github/changelog_conf.json
+          failOnError: true
+          ignorePreReleases: true
+          commitMode: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create release
+        uses: softprops/action-gh-release@v1
+        with:
+          body: ${{ steps.build_changelog.outputs.changelog }}
+          files: |
+            LICENSE
+          fail_on_unmatched_files: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  build:
+    name: build-${{ matrix.os }}
+    if: always()
+    needs: prepare-release
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            cache_path: ~/.stack
+            stack_args: "--test"
+            artifact_rel_path: /bin/simplex-chat
+            asset_name: simplex-chat-ubuntu-20_04-x86-64
+          - os: ubuntu-18.04
+            cache_path: ~/.stack
+            stack_args: "--test"
+            artifact_rel_path: /bin/simplex-chat
+            asset_name: simplex-chat-ubuntu-18_04-x86-64
+          - os: macos-latest
+            cache_path: ~/.stack
+            stack_args: "--test"
+            artifact_rel_path: /bin/simplex-chat
+            asset_name: simplex-chat-macos-x86-64
+          # TODO enable tests for windows once fixed (remove stack_args altogether)
+          - os: windows-latest
+            cache_path: C:/sr
+            stack_args: ""
+            artifact_rel_path: /bin/simplex-chat.exe
+            asset_name: simplex-chat-windows-x86-64
+    steps:
+      - name: Clone project
+        uses: actions/checkout@v2
+
+      - name: Setup Stack
+        uses: haskell/actions/setup@v1
+        with:
+          ghc-version: '8.8.4'
+          enable-stack: true
+          stack-version: 'latest'
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ matrix.cache_path }}
+          key: ${{ matrix.os }}-${{ hashFiles('stack.yaml') }}
+
+      - name: Build & test
+        id: build_test
+        run: |
+          stack build ${{ matrix.stack_args }}
+          echo "::set-output name=LOCAL_INSTALL_ROOT::$(stack path --local-install-root)"
+
+      - name: Upload binaries to release
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: ${{ steps.build_test.outputs.LOCAL_INSTALL_ROOT }}${{ matrix.artifact_rel_path }}
+          asset_name: ${{ matrix.asset_name }}
+          tag: ${{ github.ref }}
@@ -0,0 +1,36 @@
+name: "CLA Assistant"
+on:
+  issue_comment:
+    types: [created]
+  pull_request_target:
+    types: [opened, closed, synchronize]
+
+jobs:
+  CLAssistant:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "CLA Assistant"
+        if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLA Document and I hereby sign the CLA') || github.event_name == 'pull_request'
+        # Beta Release
+        uses: cla-assistant/github-action@v2.1.3-beta
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # the below token should have repo scope and must be manually added by you in the repository's secret
+          PERSONAL_ACCESS_TOKEN : ${{ secrets.PERSONAL_ACCESS_TOKEN }}
+        with:
+          path-to-signatures: 'signatures/v1.1/cla.json'
+          path-to-document: 'https://github.com/simplex-chat/cla/blob/master/CLA.md'
+          # branch should not be protected
+          remote-organization-name: simplex-chat
+          remote-repository-name: cla
+          branch: 'master'
+          # allowlist: user1,bot*
+
+         #below are the optional inputs - If the optional inputs are not given, then default values will be taken
+          #create-file-commit-message: 'For example: Creating file for storing CLA Signatures'
+          #signed-commit-message: 'For example: $contributorName has signed the CLA in #$pullRequestNo'
+          #custom-notsigned-prcomment: 'pull request comment with Introductory message to ask new contributors to sign'
+          #custom-pr-sign-comment: 'The signature to be committed in order to sign the CLA'
+          #custom-allsigned-prcomment: 'pull request comment when all contributors has signed, defaults to **CLA Assistant Lite bot** All Contributors have signed the CLA.'
+          #lock-pullrequest-aftermerge: false - if you don't want this bot to automatically lock the pull request after merging (default - true)
+          #use-dco-flag: true - If you are using DCO instead of CLA
@@ -0,0 +1,50 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+.DS_Store
+
+# Haskell
+dist
+dist-*
+cabal-dev
+*.o
+*.hi
+*.hie
+*.chi
+*.chs.h
+*.dyn_o
+*.dyn_hi
+.hpc
+.hsenv
+.cabal-sandbox/
+cabal.sandbox.config
+*.prof
+*.aux
+*.hp
+*.eventlog
+.stack-work/
+cabal.project.local
+cabal.project.local~
+.HTF/
+.ghc.environment.*
+stack.yaml.lock
+
+# Idris
+*.ibc
+
+# chat database
+*.db
+*.db.bak
@@ -1,17 +0,0 @@
-# .well-known
-
-This website files allow opening SimpleX Chat links (1-time invitations, contact addresses and groups) directly in the app.
-
-## Android
-
-File `assetlinks.json` includes certificate hashes for:
-
- Play Store (5E:3E:DC:C2:00:FB:A8:D5:F4:88:F3:CA:4C:32:5B:05:78:C5:6A:9C:03:A1:CC:B5:92:9C:D7:5C:7E:57:E2:4D)
- APK in GitHub releases (3C:52:C4:FD:3C:AD:1C:07:C9:B0:0A:70:80:E3:58:FA:B9:FE:FC:B8:AF:5A:EC:14:77:65:F1:6D:0F:21:AD:85)
- F-Droid (AE:C1:95:DC:FD:46:14:BD:3A:91:EC:26:D1:D5:14:C8:75:71:C5:CC:8D:CF:48:08:3F:92:83:14:3C:A2:B9:A6)
-
-## iOS
-
-`apple-app-site-association` needs to be served with `Content-type: application/json; charset=utf-8` and GitHub pages do not support adding this header to files without JSON extension.
-
-To workaround this (thanks to [StackOverflow - Serve json data from github pages](https://stackoverflow.com/questions/39199042/serve-json-data-from-github-pages)) we're creating directory named `apple-app-site-association` with `index.json` file that contains all the necessary configs.
@@ -1,12 +0,0 @@
-<h1 id="well-known" tabindex="-1">.well-known</h1>
-<p>This website files allow opening SimpleX Chat links (1-time invitations, contact addresses and groups) directly in the app.</p>
-<h2 id="android" tabindex="-1">Android</h2>
-<p>File <code>assetlinks.json</code> includes certificate hashes for:</p>
-<ul>
-<li>Play Store (5E:3E:DC:C2:00:FB:A8:D5:F4:88:F3:CA:4C:32:5B:05:78:C5:6A:9C:03:A1:CC:B5:92:9C:D7:5C:7E:57:E2:4D)</li>
-<li>APK in GitHub releases (3C:52:C4:FD:3C:AD:1C:07:C9:B0:0A:70:80:E3:58:FA:B9:FE:FC:B8:AF:5A:EC:14:77:65:F1:6D:0F:21:AD:85)</li>
-<li>F-Droid (AE:C1:95:DC:FD:46:14:BD:3A:91:EC:26:D1:D5:14:C8:75:71:C5:CC:8D:CF:48:08:3F:92:83:14:3C:A2:B9:A6)</li>
-</ul>
-<h2 id="ios" tabindex="-1">iOS</h2>
-<p><code>apple-app-site-association</code> needs to be served with <code>Content-type: application/json; charset=utf-8</code> and GitHub pages do not support adding this header to files without JSON extension.</p>
-<p>To workaround this (thanks to <a href="https://stackoverflow.com/questions/39199042/serve-json-data-from-github-pages">StackOverflow - Serve json data from github pages</a>) we're creating directory named <code>apple-app-site-association</code> with <code>index.json</code> file that contains all the necessary configs.</p>
@@ -1,25 +0,0 @@
-{
-  "applinks": {
-    "details": [
-      {
-        "appIDs": [
-          "5NN7GUYB6T.chat.simplex.app"
-        ],
-        "components": [
-          {
-            "/": "/contact/*"
-          },
-          {
-            "/": "/contact"
-          },
-          {
-            "/": "/invitation/*"
-          },
-          {
-            "/": "/invitation"
-          }
-        ]
-      }
-    ]
-  }
-}
@@ -1,16 +0,0 @@
-[
-    {
-        "relation": [
-            "delegate_permission/common.handle_all_urls"
-        ],
-        "target": {
-            "namespace": "android_app",
-            "package_name": "chat.simplex.app",
-            "sha256_cert_fingerprints": [
-                "5E:3E:DC:C2:00:FB:A8:D5:F4:88:F3:CA:4C:32:5B:05:78:C5:6A:9C:03:A1:CC:B5:92:9C:D7:5C:7E:57:E2:4D",
-                "3C:52:C4:FD:3C:AD:1C:07:C9:B0:0A:70:80:E3:58:FA:B9:FE:FC:B8:AF:5A:EC:14:77:65:F1:6D:0F:21:AD:85",
-                "AE:C1:95:DC:FD:46:14:BD:3A:91:EC:26:D1:D5:14:C8:75:71:C5:CC:8D:CF:48:08:3F:92:83:14:3C:A2:B9:A6"
-            ]
-        }
-    }
-]
@@ -1,18 +0,0 @@
-{
-  "names": {
-    "_": "c998a5739f04f7fff202c54962aa5782b34ecb10d6f915bdfdd7582963bf9171"
-  },
-  "relays": {
-    "c998a5739f04f7fff202c54962aa5782b34ecb10d6f915bdfdd7582963bf9171": [
-      "wss://nostr.orangepill.dev",
-      "wss://eden.nostr.land",
-      "wss://relay.damus.io",
-      "wss://relay.snort.social",
-      "wss://relay.current.fyi",
-      "wss://nos.lol",
-      "wss://relay.nostr.bg",
-      "wss://nostr-verified.wellorder.net",
-      "wss://nostr.milou.lol"
-    ]
-  }
-}
@@ -1 +0,0 @@
-ae8b5b2e-76c9-4a31-a044-bcbda1cdf264
@@ -1 +0,0 @@
-simplex.chat
@@ -0,0 +1,10 @@
+FROM haskell:8.10.4 AS build-stage
+# if you encounter "version `GLIBC_2.28' not found" error when running
+# chat client executable, build with the following base image instead:
+# FROM haskell:8.10.4-stretch AS build-stage
+COPY . /project
+WORKDIR /project
+RUN stack install
+
+FROM scratch AS export-stage
+COPY --from=build-stage /root/.local/bin/simplex-chat /
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
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+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
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+
+  A secondary benefit of defending all users' freedom is that
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+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
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+ensure that, in such cases, the modified source code becomes available
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+
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+published by Affero, was designed to accomplish similar goals.  This is
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+<https://www.gnu.org/licenses/>.
@@ -0,0 +1,314 @@
+<img src="images/simplex-chat-logo.svg" alt="SimpleX logo" width="100%">
+
+# SimpleX Chat
+
+**The world's most private and secure chat** - open-source, decentralized, and without global identities of any kind.
+
+[![GitHub build](https://github.com/simplex-chat/simplex-chat/workflows/build/badge.svg)](https://github.com/simplex-chat/simplex-chat/actions?query=workflow%3Abuild)
+[![GitHub downloads](https://img.shields.io/github/downloads/simplex-chat/simplex-chat/total)](https://github.com/simplex-chat/simplex-chat/releases)
+[![GitHub release](https://img.shields.io/github/v/release/simplex-chat/simplex-chat)](https://github.com/simplex-chat/simplex-chat/releases)
+[![Follow on Twitter](https://img.shields.io/twitter/follow/SimpleXChat?style=social)](https://twitter.com/simplexchat)
+[![Join on Reddit](https://img.shields.io/reddit/subreddit-subscribers/SimpleXChat?style=social)](https://www.reddit.com/r/SimpleXChat)
+
+SimpleX chat prototype is a thin terminal UI on top of [SimpleXMQ](https://github.com/simplex-chat/simplexmq) message broker that uses [SMP protocols](https://github.com/simplex-chat/simplexmq/blob/master/protocol). The motivation for SimpleX chat is [presented here](./simplex.md). See [simplex.chat](https://simplex.chat) website for chat demo and the explanations of the system and how SMP protocol works.
+
+**NEW in v0.5.0: [user contact addresses](#user-contact-addresses-alpha)!**
+
+**Please note**: v0.5.0 of SimpleX Chat works with the same database, but the connection links are not compatible with the previous version - please ask all your contacts to upgrade!
+
+### :zap: Quick installation
+
+```sh
+curl -o- https://raw.githubusercontent.com/simplex-chat/simplex-chat/master/install.sh | bash
+```
+
+Once the chat client is installed, simply run `simplex-chat` from your terminal.
+
+### :wave: Welcome
+
+**We are building the world's most private and secure chat**. If you would like to support it, you can do so in the following ways:
+
+- 🌟  **Star it on GitHub** - it helps us raise the visibility of the project.
+
+- **Install the chat and try it out** - if you spot a bug, please [raise an issue](https://github.com/simplex-chat/simplex-chat/issues).
+
+- :speech_balloon:  **Spread the word** - terminal chat is an [early-stage product](#disclaimer) while we stabilize the protocol - you can invite your friends for some fun chat inside your terminal. We're using it right inside our IDEs as we are coding it 👨‍💻
+
+- **Make a donation** via [opencollective](https://opencollective.com/simplex-chat) - every donation helps, however large or small!
+
+- **Make a contribution to the project** - we're constantly moving the project forward and there are always lots of things to do!
+
+We appreciate all the help from our contributors, thank you!
+
+![simplex-chat](./images/connection.gif)
+
+## Table of contents
+
+- [Disclaimer](#disclaimer)
+- [Network topology](#network-topology)
+- [Terminal chat features](#terminal-chat-features)
+- [Installation](#🚀-installation)
+  - [Download chat client](#download-chat-client)
+    - [Linux and MacOS](#linux-and-macos)
+      - [Troubleshooting on Unix](#troubleshooting-on-unix)
+    - [Windows](#windows)
+  - [Build from source](#build-from-source)
+    - [Using Docker](#using-docker)
+    - [Using Haskell stack](#using-haskell-stack)
+- [Usage](#usage)
+  - [Running the chat client](#running-the-chat-client)
+  - [How to use SimpleX chat](#how-to-use-simplex-chat)
+  - [Groups](#groups)
+  - [Sending files](#sending-files)
+  - [User contact addresses](#user-contact-addresses-alpha)
+  - [Access chat history](#access-chat-history)
+- [Roadmap](#Roadmap)
+- [License](#license)
+
+## Disclaimer
+
+This is WIP implementation of SimpleX Chat that implements a new network topology for asynchronous communication combining the advantages and avoiding the disadvantages of federated and P2P networks.
+
+If you expect software to be reliable most of the time, then this is probably not ready for you yet. We use it ourselves for terminal chat and it seems to work most of the time - we would really appreciate if you try SimpleX Chat and give us your feedback!
+
+> :warning: **Please note:** The main differentiation of SimpleX network is the approach to internet message routing rather than encryption; for that reason no sufficient attention was paid to either TCP transport level encryption or to E2E encryption protocols - they are implemented in an ad hoc way based on RSA and AES algorithms. See [SMP protocol](https://github.com/simplex-chat/simplexmq/blob/master/protocol/simplex-messaging.md#appendix-a) on TCP transport encryption protocol (AEAD-GCM scheme, with an AES key negotiation based on RSA key hash known to the client in advance) and [this section](https://github.com/simplex-chat/simplexmq/blob/master/rfcs/2021-01-26-crypto.md#e2e-encryption) on E2E encryption protocol (an ad hoc hybrid scheme a la PGP). These protocols will change in a consumer ready version to something more robust.
+
+## Network topology
+
+SimpleX is a decentralized client-server network that uses redundant, disposable nodes to asynchronously pass messages via message queues, providing receiver and sender anonymity.
+
+Unlike P2P networks, all messages are passed through one or several (for redundancy) servers, that do not even need to have persistence (in fact, the current [SMP server implementation](https://github.com/simplex-chat/simplexmq#smp-server) uses in-memory message storage, persisting only the queue records) - it provides better metadata protection than P2P designs, as no global participant ID is required, and avoids many [problems of P2P networks](https://github.com/simplex-chat/simplex-chat/blob/master/simplex.md#comparison-with-p2p-messaging-protocols).
+
+Unlike federated networks, the participating server nodes **do not have records of the users**, **do not communicate with each other**, **do not store messages** after they are delivered to the recipients, and there is no way to discover the full list of participating servers. SimpleX network avoids the problem of metadata visibility that federated networks suffer from and better protects the network, as servers do not communicate with each other. Each server node provides unidirectional "dumb pipes" to the users, that do authorization without authentication, having no knowledge of the the users or their contacts. Each queue is assigned two RSA keys - one for receiver and one for sender - and each queue access is authorized with a signature created using a respective key's private counterpart.
+
+The routing of messages relies on the knowledge of client devices how user contacts and groups map at any given moment of time to these disposable queues on server nodes.
+
+## Terminal chat features
+
+- 1-to-1 chat with multiple people in the same terminal window.
+- Group messaging.
+- Sending files to contacts and groups.
+- User contact addresses - establish connections via multiple-use contact links.
+- Auto-populated recipient name - just type your messages to reply to the sender once the connection is established.
+- Demo SMP servers available and pre-configured in the app - or you can [deploy your own server](https://github.com/simplex-chat/simplexmq#using-smp-server-and-smp-agent).
+- No global identity or any names visible to the server(s), ensuring full privacy of your contacts and conversations.
+- E2E encryption, with RSA public key that has to be passed out-of-band (see [How to use SimpleX chat](#how-to-use-simplex-chat)).
+- Message signing and verification with automatically generated RSA keys.
+- Message integrity validation (via including the digests of the previous messages).
+- Authentication of each command/message by SMP servers with automatically generated RSA key pairs.
+- TCP transport encryption using SMP transport protocol.
+
+RSA keys are not used as identity, they are randomly generated for each contact.
+
+<a name="🚀-installation"></a>
+
+## 🚀 Installation
+
+### Download chat client
+
+#### Linux and MacOS
+
+To **install** or **update** `simplex-chat`, you should run the install script. To do that, use the following cURL or Wget command:
+
+```sh
+curl -o- https://raw.githubusercontent.com/simplex-chat/simplex-chat/master/install.sh | bash
+```
+
+```sh
+wget -qO- https://raw.githubusercontent.com/simplex-chat/simplex-chat/master/install.sh | bash
+```
+
+Once the chat client downloads, you can run it with `simplex-chat` command in your terminal.
+
+Alternatively, you can manually download the chat binary for your system from the [latest stable release](https://github.com/simplex-chat/simplex-chat/releases) and make it executable as shown below.
+
+```sh
+chmod +x <binary>
+mv <binary> ~/.local/bin/simplex-chat
+```
+
+(or any other preferred location on `PATH`).
+
+On MacOS you also need to [allow Gatekeeper to run it](https://support.apple.com/en-us/HT202491).
+
+##### Troubleshooting on Unix
+
+If you get `simplex-chat: command not found` when executing the downloaded binary, you need to add the directory containing it to the [`PATH` variable](https://man7.org/linux/man-pages/man7/environ.7.html) (find "PATH" in page). To modify `PATH` for future sessions, put `PATH="$PATH:/path/to/dir"` in `~/.profile`, or in `~/.bash_profile` if that's what you have. See [this answer](https://unix.stackexchange.com/a/26059) for the detailed explanation on the appropriate place to define environment variables for `bash` and other shells.
+
+For example, if you followed the previous instructions, open `~/.profile` for editing:
+
+```sh
+vi ~/.profile
+```
+
+And add the following line to the end:
+
+```sh
+PATH="$PATH:$HOME/.local/bin"
+```
+
+Note that this will not automatically update your `PATH` for the remainder of the session. To do this, you should run:
+
+```sh
+source ~/.profile
+```
+
+Or restart your terminal to start a new session.
+
+#### Windows
+
+```sh
+move <binary> %APPDATA%/local/bin/simplex-chat.exe
+```
+
+### Build from source
+
+#### Using Docker
+
+On Linux, you can build the chat executable using [docker build with custom output](https://docs.docker.com/engine/reference/commandline/build/#custom-build-outputs):
+
+```shell
+$ git clone git@github.com:simplex-chat/simplex-chat.git
+$ cd simplex-chat
+$ DOCKER_BUILDKIT=1 docker build --output ~/.local/bin .
+```
+
+> **Please note:** If you encounter `` version `GLIBC_2.28' not found `` error, rebuild it with `haskell:8.10.4-stretch` base image (change it in your local [Dockerfile](Dockerfile)).
+
+#### Using Haskell stack
+
+Install [Haskell stack](https://docs.haskellstack.org/en/stable/README/):
+
+```shell
+curl -sSL https://get.haskellstack.org/ | sh
+```
+
+and build the project:
+
+```shell
+$ git clone git@github.com:simplex-chat/simplex-chat.git
+$ cd simplex-chat
+$ stack install
+```
+
+## Usage
+
+### Running the chat client
+
+To start the chat client, run `simplex-chat` from the terminal. If you get `simplex-chat: command not found`, see [Troubleshooting on Unix](#troubleshooting-on-unix).
+
+By default, app data directory is created in the home directory (`~/.simplex`, or `%APPDATA%/simplex` on Windows), and two SQLite database files `simplex.chat.db` and `simplex.agent.db` are initialized in it.
+
+To specify a different file path prefix for the database files use `-d` command line option:
+
+```shell
+$ simplex-chat -d alice
+```
+
+Running above, for example, would create `alice.chat.db` and `alice.agent.db` database files in current directory.
+
+Default SMP servers are hosted on Linode (London, UK and Fremont, CA) - they are [pre-configured in the app](https://github.com/simplex-chat/simplex-chat/blob/master/src/Simplex/Chat/Options.hs#L40). Base-64 encoded string after server host is the transport key digest.
+
+If you deployed your own SMP server(s) you can configure client via `-s` option:
+
+```shell
+$ simplex-chat -s smp.example.com:5223#KXNE1m2E1m0lm92WGKet9CL6+lO742Vy5G6nsrkvgs8=
+```
+
+The base-64 encoded string in server address is the digest of RSA transport handshake key that the server will generate on the first run and output its digest.
+
+You can still talk to people using default or any other server - it only affects the location of the message queue when you initiate the connection (and the reply queue can be on another server, as set by the other party's client).
+
+Run `simplex-chat -h` to see all available options.
+
+### How to use SimpleX chat
+
+Once you have started the chat, you will be prompted to specify your "display name" and an optional "full name" to create a local chat profile. Your display name is an alias for your contacts to refer to you by - it is not unique and does not serve as a global identity. If some of your contacts chose the same display name, the chat client adds a numeric suffix to their local display name.
+
+The diagram below shows how to connect and message a contact:
+
+<div align="center">
+  <img align="center" src="images/how-to-use-simplex.svg">
+</div>
+
+Once you've set up your local profile, enter `/c` (for `/connect`) to create a new connection and generate an invitation. Send this invitation to your contact via any other channel.
+
+You are able to create multiple invitations by entering `/connect` multiple times and sending these invitations to the corresponding contacts you'd like to connect with.
+
+The invitation has the format `smp::<server>::<queue_id>::<rsa_public_key_for_this_queue_only>`. The invitation can only be used once and even if this is intercepted, the attacker would not be able to use it to send you the messages via this queue once your contact confirms that the connection is established.
+
+The contact who received the invitation should enter `/c <invitation>` to accept the connection. This establishes the connection, and both parties are notified.
+
+They would then use `@<name> <message>` commands to send messages. You may also just start typing a message to send it to the contact that was the last.
+
+Use `/help` in chat to see the list of available commands.
+
+### Groups
+
+To create a group use `/g <group>`, then add contacts to it with `/a <group> <name>`. You can then send messages to the group by entering  `#<group> <message>`. Use `/help groups` for other commands.
+
+![simplex-chat](./images/groups.gif)
+
+> **Please note**: the groups are not stored on any server, they are maintained as a list of members in the app database to whom the messages will be sent.
+
+### Sending files
+
+You can send a file to your contact with `/f @<contact> <file_path>` - the recipient will have to accept it before it is sent. Use `/help files` for other commands.
+
+![simplex-chat](./images/files.gif)
+
+You can send files to a group with `/f #<group> <file_path>`.
+
+### User contact addresses (alpha)
+
+As an alternative to one-time invitation links, you can create a long-term address with `/ad` (for `/address`). The created address can then be shared via any channel, and used by other users as a link to make a contact request with `/c <user_contact_address>`.
+
+You can accept or reject incoming requests with `/ac <name>` and `/rc <name>` commands.
+
+User address is "long-term" in a sense that it is a multiple-use connection link - it can be used until it is deleted by the user, in which case all established connections would still remain active (unlike how it works with email, when changing the address results in people not being able to message you).
+
+Use `/help address` for other commands.
+
+> :warning: **Please note:** This is an "alpha" feature - at the moment there is nothing to prevent someone who has obtained this address from spamming you with connection requests; countermeasures will be added soon!  (In the short term, you can simply delete the long-term address you created if it starts getting abused.)
+
+![simplex-chat](./images/user-addresses.gif)
+
+### Access chat history
+
+> 🚧 **Section currently out of date** 🏗
+
+SimpleX chat stores all your contacts and conversations in a local database file, making it private and portable by design, fully owned and controlled by you.
+
+You can search your chat history via SQLite database file:
+
+```
+sqlite3 ~/.simplex/smp-chat.db
+```
+
+Now you can query `messages` table, for example:
+
+```sql
+select * from messages
+where conn_alias = cast('alice' as blob)
+  and body like '%cats%'
+order by internal_id desc;
+```
+
+> **Please note:** SQLite foreign key constraints are disabled by default, and must be **[enabled separately for each database connection](https://sqlite.org/foreignkeys.html#fk_enable)**. The latter can be achieved by running `PRAGMA foreign_keys = ON;` command on an open database connection. By running data altering queries without enabling foreign keys prior to that, you may risk putting your database in an inconsistent state.
+
+## Roadmap
+
+1. Mobile and desktop apps (in progress).
+2. SMP protocol improvements:
+   - SMP queue redundancy and rotation.
+   - Message delivery confirmation.
+   - Support multiple devices.
+3. Privacy-preserving identity server for optional DNS-based contact/group addresses to simplify connection and discovery, but not used to deliver messages:
+   - keep all your contacts and groups even if you lose the domain.
+   - the server doesn't have information about your contacts and groups.
+4. Media server to optimize sending large files to groups.
+5. Channels server for large groups and broadcast channels.
+
+## License
+
+[AGPL v3](./LICENSE)
@@ -0,0 +1,27 @@
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Main where
+
+import Simplex.Chat
+import Simplex.Chat.Controller (versionNumber)
+import Simplex.Chat.Options
+import System.Directory (getAppUserDataDirectory)
+import System.Terminal (withTerminal)
+
+main :: IO ()
+main = do
+  opts <- welcomeGetOpts
+  t <- withTerminal pure
+  simplexChat defaultChatConfig opts t
+
+welcomeGetOpts :: IO ChatOpts
+welcomeGetOpts = do
+  appDir <- getAppUserDataDirectory "simplex"
+  opts@ChatOpts {dbFile} <- getChatOpts appDir
+  putStrLn $ "SimpleX Chat v" ++ versionNumber
+  putStrLn $ "db: " <> dbFile <> ".chat.db, " <> dbFile <> ".agent.db"
+  putStrLn "type \"/help\" or \"/h\" for usage info"
+  pure opts
--- a/Show More
+++ b/Show More