[Unit]
Description=lchat home server (passkey blob backup)
After=network-online.target
Wants=network-online.target

[Service]
# /data/home.env holds LCHAT_HOME_ORIGIN — the WebAuthn RP identity. It must equal
# the public host the router serves this on, or previously-enrolled passkeys orphan.
EnvironmentFile=/data/home.env
ExecStart=/opt/lchat/home --addr /run/lchat/home.sock --db /data/home.db
Restart=always
RestartSec=1

# --- hardening (see docs/instance-router.md § Hardening) ---
User=lchat
Group=lchat
CapabilityBoundingSet=
NoNewPrivileges=yes
ProtectSystem=strict
ProtectHome=yes
ReadWritePaths=/data /run/lchat
PrivateTmp=yes
PrivateDevices=yes
ProtectClock=yes
ProtectHostname=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectKernelLogs=yes
ProtectControlGroups=yes
ProtectProc=invisible
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
SystemCallFilter=@system-service
SystemCallErrorNumber=EPERM
SystemCallArchitectures=native
MemoryMax=256M
TasksMax=256

[Install]
WantedBy=multi-user.target