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ReVoltVPN/SERVER_DEPLOYMENT.md
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ReVoltVPN — Server Deployment Guide v7.0 (XHTTP + Reality + Domain-Free)

Last verified: 2026-08-02 against live Xray docs at https://xtls.github.io/en/ Transport: XHTTP (H2 stream-up) + Reality — NOT TCP, NOT XTLS-Vision Spoof target: www.github.com (single site, Cloudflare-backed) Client: Domain-free — API routed through tunnel, no domain in APK. See DOCUMENTATION-ARCHITECTURE-V2.md.

Connection Flow — End to End

Step 0: Bootstrap (V2 — domain-free)

Before the normal session flow, the app connects with a hardcoded Reality config bundled in the APK (bootstrapVlessUrl). This bootstrap client is permanently defined in xray_config_reality.json with email: "bootstrap". Xray routing restricts it to 10.254.254.0/24 — only the internal API, zero internet access.

App → bootstrap tunnel (Reality, github.com SNI) → polls 10.254.254.1:5000
                                                      ↓
                                               Xray "api" outbound
                                               (redirect: 127.0.0.1:5000)
                                                      ↓
                                               Flask Hivemind

The app fetches the real per-session VLESS URL through the bootstrap tunnel, disconnects, then reconnects with the real config. From now on, ALL API calls (health, sync, stop) go through 10.254.254.1:5000 inside the tunnel. Phone never makes a connection to any domain.

Step 1: Client taps Connect

App → AdMob SSV → server creates VLESS UUID → app bootstraps → polls inside tunnel

### Step 2: Server returns session config

The `/session/status` response (from `hivemind/api.py`):

```json
{
  "active":       true,
  "vless_uuid":   "550e8400-e29b-41d4-a716-446655440000",
  "vless_ip":     "204.168.246.88",
  "vless_port":   8443,
  "reality_pbk":  "fHyNQm1UbaFD3wRQn4AAx5SdVzDCzlxm8G4xprpWymI=",
  "reality_sid":  "abc123",
  "reality_sni":  "www.github.com",
  "reality_fp":   "chrome",
  "xhttp_path":   "/revolt",
  "expires_in_seconds": 3540,
  "nonce":        "1234567890-1716480000",
  "is_throttled": false
}

Every Reality parameter comes from the server — client has no hardcoded SNI or path.

Step 3: Client builds VLESS URL

From these response fields, hivemind_service.dart builds:

vless://[email protected]:8443
  ?security=reality
  &type=xhttp
  &path=%2Frevolt
  &pbk=fHyNQm1UbaFD3wRQn4AAx5SdVzDCzlxm8G4xprpWymI%3D
  &sni=www.github.com
  &sid=abc123
  &fp=chrome
  #ReVoltVPN

Every parameter verified against live docs:

Parameter Live doc source Required? Value
security=reality Reality docs: "REALITY can only be used together with RAW, XHTTP, and gRPC" Yes reality
type=xhttp XHTTP docs: transport name Yes xhttp
path=/revolt XHTTP docs: "只需填 path，其它不填即可" Yes server-defined
pbk=... Reality docs: "password: string — Required. The public key corresponding to the server private key." Yes from xray x25519
sni=... Reality docs: "serverName: string — One of the server-side serverNames." Yes from REALITY_SNI_POOL
sid=... Reality docs: "shortId: string — One of the server-side shortIds." Yes abc123
fp=chrome Reality docs: "fingerprint: string — One of chrome, firefox, safari, random..." Yes chrome
host= XHTTP docs: "建议没事别设" (don't set unless needed) No intentionally omitted
flow= VLESS docs: "XTLS only available: TCP+TLS/REALITY" (NOT XHTTP) No intentionally omitted

Step 4: flutter_vless generates Xray client config

flutter_vless 1.1.4 parses the VLESS URL and produces the equivalent of:

{
  "outbounds": [{
    "protocol": "vless",
    "settings": {
      "vnext": [{
        "address": "204.168.246.88",
        "port": 8443,
        "users": [{
          "id": "550e8400-e29b-41d4-a716-446655440000",
          "encryption": "none",
          "flow": ""
        }]
      }]
    },
    "streamSettings": {
      "network": "xhttp",
      "security": "reality",
      "xhttpSettings": {
        "path": "/revolt"
      },
      "realitySettings": {
        "serverName": "www.github.com",
        "fingerprint": "chrome",
        "publicKey": "fHyNQm1UbaFD3wRQn4AAx5SdVzDCzlxm8G4xprpWymI=",
        "shortId": "abc123",
        "spiderX": ""
      }
    }
  }]
}

Step 5: TLS handshake (Reality)

Client                              Server (Xray)
  |                                     |
  |── ClientHello ────────────────────→|
  |   SNI: www.github.com              |
  |   ALPN: h2 (H2 default w/ Reality) |
  |   random session ID                |
  |                                     |
  |←── ServerHello ────────────────────|
  |   Certificate: github.com's REAL   |
  |   cert (fetched from               |
  |   www.github.com:443 by Xray)      |
  |   Signed with Reality privateKey   |
  |                                     |
  |── auth: pbk + shortId ───────────→|
  |   (embedded in TLS extension)      |
  |                                     |
  |←── TLS 1.3 handshake complete ────|

To any DPI box, this looks exactly like a browser connecting to GitHub.

Step 6: HTTP/2 + VLESS inside the TLS tunnel

Inside the TLS tunnel:
  ┌─────────────────────────────────┐
  │  HTTP/2 connection              │
  │  :method: POST                  │
  │  :path: /revolt                 │  ← XHTTP path matching
  │  :authority: www.github.com     │  ← Host header (SNI fallback)
  │                                 │
  │  ┌───────────────────────────┐  │
  │  │  VLESS payload            │  │
  │  │  UUID auth: ✓             │  │
  │  │  Actual VPN traffic       │  │
  │  └───────────────────────────┘  │
  └─────────────────────────────────┘

Step 7: Xray routes traffic

Phone → Xray Reality (8443)
           │
           ├─ dest: 10.254.254.0/24 → api outbound (redirect → Flask 127.0.0.1:5000)
           ├─ user: bootstrap, other dest → block (blackhole)
           ├─ port: 25,465,587 → block (SMTP)
           ├─ port: 135-139,445 → block (NetBIOS)
           ├─ port: 1900 → block (SSDP)
           └─ default → direct (freedom → internet)

Will it work? — Answer

Yes, if these 5 things are true on the server:

  1. ✅ xray_config_reality.json deployed to /usr/local/etc/xray/config.json with the real private key
  2. ✅ hivemind/config.py has the matching public key in REALITY_PUBLIC_KEY
  3. ✅ Bootstrap UUID generated (xray uuid) and placed in BOTH xray_config_reality.json AND app_config.dart
  4. ✅ Xray restarted after config deploy
  5. ✅ Firewall allows inbound 8443 (and 8444 for throttled)

The config is internally consistent. Every parameter flows from a single source:

  • config.py → API → client → flutter_vless → Xray client config
  • config.json → Xray server inbound

If those match (and they do in this repo), the tunnel will establish.

Server Setup (clean deploy)

1. Install Xray

bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install

2. Generate Reality keypair

xray x25519
# Output:
# Private key: <44-char base64>   ← goes in xray_config_reality.json
# Public key:  <44-char base64>   ← goes in hivemind/config.py

3. Generate bootstrap UUID

xray uuid
# Output: 6ba7b810-9dad-11d1-80b4-00c04fd430c8

Put this UUID in TWO places:

  1. xray_config_reality.json — replace BOOTSTRAP-UUID-REPLACE-ME in the bootstrap client's "id" field
  2. lib/logic/app_config.dart — replace BOOTSTRAP-UUID-GOES-HERE in bootstrapUuid

4. Deploy Xray config

Copy xray_config_reality.json from this repo → /usr/local/etc/xray/config.json on the server.

Replace the private key with the one you just generated:

"privateKey": "YOUR_GENERATED_PRIVATE_KEY"

chmod 600 /usr/local/etc/xray/config.json
systemctl restart xray
systemctl status xray   # verify: active (running)

5. Verify Xray is listening

ss -tlnp | grep -E '8443|8444'
# Should show:
# LISTEN  0.0.0.0:8443   (Xray — full speed)
# LISTEN  0.0.0.0:8444   (Xray — throttled)

6. Verify the spoof cert is reachable

xray tls ping www.github.com:443
# Should show: certificate size > 3500 bytes (good for Reality)

7. Deploy Python Hivemind

Upload to /root/:

server_hivemind_5_0.py        ← entry point
hivemind/                     ← package (8 files)
  ├── config.py               ← EDIT: public key, server IP
  ├── sessions.py
  ├── xray.py
  ├── admob.py
  ├── management.py
  ├── api.py
  ├── main.py
  └── __init__.py

8. Edit hivemind/config.py

REALITY_PUBLIC_KEY  = "YOUR_GENERATED_PUBLIC_KEY"   # from xray x25519
VLESS_SERVER_IP     = "YOUR_SERVER_IP"              # Hetzner/VPS IP
REALITY_SNI_POOL    = ["www.github.com"]            # spoof target
VLESS_XHTTP_PATH    = "/revolt"                     # must match config.json

9. Install Python dependencies

pip install flask requests

10. Create systemd unit

/etc/systemd/system/hivemind.service:

[Unit]
Description=ReVoltVPN Hivemind
After=network.target xray.service

[Service]
Type=simple
User=root
WorkingDirectory=/root
ExecStart=/usr/bin/python3 -m gunicorn -w 1 -b 127.0.0.1:5000 hivemind.main:app
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl enable --now hivemind
systemctl status hivemind

11. Firewall

# Only open what's needed
ufw allow 443/tcp    # nginx HTTPS (API)
ufw allow 8443/tcp   # Xray Reality (full speed)
ufw allow 8444/tcp   # Xray Reality (throttled)
ufw allow 80/tcp     # certbot HTTP challenge
ufw enable

# Keep these internal-only
# 5000 — Flask (localhost only, via nginx)
# 10085 — Xray API (localhost only)

12. nginx (AdMob SSV + website)

nginx now serves only two purposes — the app itself never connects to it:

  • AdMob SSV callbacks (/api/admob/callback) — Google → your server, not phone → server
  • Branding website at the root — user's browser, manually

Xray handles all app-to-server traffic through the Reality tunnel.

/etc/nginx/sites-available/revolt:

server {
    listen 443 ssl http2;
    server_name YOUR_DOMAIN;

    ssl_certificate     /etc/letsencrypt/live/YOUR_DOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/YOUR_DOMAIN/privkey.pem;

    location /api/ {
        proxy_pass http://127.0.0.1:5000;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location / {
        root /var/www/revolt;
        index index.html;
    }
}

server {
    listen 80;
    server_name YOUR_DOMAIN;
    return 301 https://$host$request_uri;
}

13. certbot (Let's Encrypt)

apt install certbot python3-certbot-nginx
certbot --nginx -d YOUR_DOMAIN

Smoke Test

From the server:

# 1. Is Xray running?
systemctl status xray

# 2. Is Hivemind running?
systemctl status hivemind

# 3. Can Hivemind reach Xray API?
curl http://127.0.0.1:10085/stats/query -d '{"pattern":"","reset":false}'

# 4. Is Flask alive internally?
curl http://127.0.0.1:5000/api/health
# → {"ok": true}

# 5. Does the API route through Xray work? (simulate tunnel → 10.254.254.1 → Flask)
curl http://10.254.254.1:5000/api/health
# → should fail (only reachable through Xray tunnel, not directly)

# 6. Does the spoof target work?
xray tls ping www.github.com:443

From a client (after building the Flutter app):

The app no longer hits any domain. All API calls go through the tunnel. Verify by building and running the app in debug mode (ADMOB_BYPASS=True).

# 7. Tap Connect → app bootstraps → polls inside tunnel → reconnects → timer starts
# 8. Health dot turns green (API reachable through tunnel)
# 9. Session timer syncs (5 second countdown updates)
# 10. Tap Disconnect → timer stops → cleanup POST goes through tunnel → tunnel drops

Full integration test:

11. Trigger 4 GB → timer shows port-swap → reconnects through bootstrap → speed reduced
12. Support ad top-up → +30 min +2 GB → timer updates without reconnect
13. Kill app while connected → reopen → timer resumes (startup restoration)

Troubleshooting

Symptom Check
App says "Connecting..." forever Server firewall blocking 8443? ufw status
App connects but no internet Xray routing broken? Check journalctl -u xray -f
/session/status returns 500 Hivemind crashed? systemctl status hivemind
xray tls ping fails Server can't reach GitHub? DNS? IPv6?
Stats show 0 bytes Users missing email field? Check xray.py:add_client()
Tunnel starts but immediately dies providerBundleIdentifier mismatch? Must be com.paladinvpn.app
"Session not activated" in app ADMOB_BYPASS not True? Or SSV callback not firing
App stuck on "Establishing secure channel…" Bootstrap UUID mismatch between APK and xray_config?
Health dot gray after tunnel connects api outbound not working? Check Xray routing rules
Bootstrap tunnel starts but no config Hivemind not running on 127.0.0.1:5000? systemctl status hivemind

Changing the spoof target

If you ever want to switch from GitHub to another site:

  1. Edit REALITY_SNI_POOL in hivemind/config.py
  2. Edit serverNames in both inbounds in config.json (add site + root domain)
  3. Update dest in config.json to the new target
  4. Verify: xray tls ping NEW_TARGET:443 — cert must be > 3500 bytes
  5. systemctl restart xray

Differences from old TCP/Vision setup

What Old (SERVER_SETUP.md) New (this doc)
Transport tcp xhttp
Flow xtls-rprx-vision (none — XTLS doesn't work with XHTTP)
Spoof target www.microsoft.com www.github.com
Path (none — TCP) /revolt (XHTTP path)
Rate limiting uplinkOnly: 187500 (wrong) uplinkOnly: 2 (correct seconds), real cap via tc
shortIds 3 entries 1 entry matching REALITY_SHORT_ID
Fallback limits Not present Intentionally omitted (fingerprint risk per live docs)
xhttp_path in API Not present Server sends path, client reads it
providerBundleIdentifier com.revoltvpn.app com.paladinvpn.app
API transport HTTPS to domain Tunnel-internal to 10.254.254.1:5000
Domain in APK getrevolt.app None — zero domain strings
Bootstrap None (external API polling) Hardcoded Reality config, tunnel-only API fetch
Xray outbounds direct + block direct + block + api (redirect → Flask)
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