f7a849ddcb
Mixed-language UI was confusing — onboarding said "Why DChain / How it
works / Your keys" in English headings but feature descriptions and
CTAs were in Russian; compose's confirm dialog was Russian; feed tabs
were Russian; error messages in humanizeTxError were Russian.
Everything user-facing is now English.
Files touched (only string literals, not comments):
app/index.tsx onboarding slides + CTA buttons
app/(app)/compose.tsx composer alerts, header button, placeholder,
attachment-size hint
app/(app)/feed/index.tsx tab labels (Following/For you/Trending),
empty-state hints, retry button
app/(app)/feed/[id].tsx post detail header + stats rows (Views,
Likes, Size, Paid to publish, Hosted on,
Hashtags)
app/(app)/feed/tag/[tag].tsx empty-state copy
app/(app)/profile/[address].tsx Profile header, Follow/Following,
Edit, Open chat, Address, Copied, Encryption,
Added, Members, unknown-contact hint
app/(app)/new-contact.tsx Search title, placeholder, Search button,
empty-state hint, E2E-ready indicator,
Intro label + placeholder, fee-tier labels
(Min / Standard / Priority), Send request,
Insufficient-balance alert, Request-sent
alert
app/(app)/requests.tsx Notifications title, empty-state, Accept /
Decline buttons, decline-confirm alert,
"wants to add you" line
components/SearchBar.tsx default placeholder
components/feed/PostCard.tsx long-press menu (Delete post, confirm,
Actions / Cancel)
components/feed/ShareSheet.tsx sheet title, contact-search placeholder,
empty state, Select contacts / Send button,
plural helper rewritten for English
components/chat/PostRefCard.tsx "POST" ribbon, "photo" indicator
lib/api.ts humanizeTxError (rate-limit, clock skew,
bad signature, 400/5xx/network-error
messages)
lib/dates.ts dateBucket now returns Today/Yesterday/
"Jun 17, 2025"; month array switched to
English short forms
Code comments left in Russian intentionally — they're developer
context, not user-facing. This commit is purely display-string.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
DChain Messenger — React Native Client
E2E-encrypted mobile/desktop messenger built on the DChain blockchain stack.
Stack: React Native · Expo · NativeWind (Tailwind) · TweetNaCl · Zustand
Quick Start
cd client-app
npm install
npx expo start # opens Expo Dev Tools
# Press 'i' for iOS simulator, 'a' for Android, 'w' for web
Requirements
- Node.js 18+
- Expo Go on your phone (for Expo tunnel), or iOS/Android emulator
- A running DChain node (see root README for
docker compose up --build -d)
Project Structure
client-app/
├── app/
│ ├── _layout.tsx # Root layout — loads keys, sets up nav
│ ├── index.tsx # Welcome / onboarding
│ ├── (auth)/
│ │ ├── create.tsx # Generate new Ed25519 + X25519 keys
│ │ ├── created.tsx # Key created — export reminder
│ │ └── import.tsx # Import existing key.json
│ └── (app)/
│ ├── _layout.tsx # Tab bar — Chats · Wallet · Settings
│ ├── chats/
│ │ ├── index.tsx # Chat list with contacts
│ │ └── [id].tsx # Individual chat with E2E encryption
│ ├── requests.tsx # Incoming contact requests
│ ├── new-contact.tsx # Add contact by @username or address
│ ├── wallet.tsx # Balance + TX history + send
│ └── settings.tsx # Node URL, key export, profile
├── components/ui/ # shadcn-style components (Button, Card, Input…)
├── hooks/
│ ├── useMessages.ts # Poll relay inbox, decrypt messages
│ ├── useBalance.ts # Poll token balance
│ └── useContacts.ts # Load contacts + poll contact requests
└── lib/
├── api.ts # REST client for all DChain endpoints
├── crypto.ts # NaCl box encrypt/decrypt, Ed25519 sign
├── storage.ts # SecureStore (keys) + AsyncStorage (data)
├── store.ts # Zustand global state
├── types.ts # TypeScript interfaces
└── utils.ts # cn(), formatAmount(), relativeTime()
Cryptography
| Operation | Algorithm | Library |
|---|---|---|
| Transaction signing | Ed25519 | TweetNaCl sign |
| Key exchange | X25519 (Curve25519) | TweetNaCl box |
| Message encryption | NaCl box (XSalsa20-Poly1305) | TweetNaCl box |
| Key storage | Device secure enclave | expo-secure-store |
Messages are encrypted as:
Envelope {
sender_pub: <X25519 hex> // sender's public key
recipient_pub: <X25519 hex> // recipient's public key
nonce: <24-byte hex> // random per message
ciphertext: <hex> // NaCl box(plaintext, nonce, sender_priv, recipient_pub)
}
Connect to your node
- Start the DChain node:
docker compose up --build -d - Open the app → Settings → Node URL →
http://YOUR_IP:8081 - If using Expo Go on physical device: your PC and phone must be on the same network, or use
npx expo start --tunnel
Key File Format
The key.json exported/imported by the app:
{
"pub_key": "26018d40...", // Ed25519 public key (64 hex chars)
"priv_key": "...", // Ed25519 private key (128 hex chars)
"x25519_pub": "...", // X25519 public key (64 hex chars)
"x25519_priv": "..." // X25519 private key (64 hex chars)
}
This is the same format as the Go node's --key flag.