feat: add support both internal and public relay URL

.env.example

@@ -6,4 +6,5 @@ ALBY_CLIENT_ID=
 OAUTH_REDIRECT_URL=http://localhost:8080/alby/callback
 COOKIE_SECRET=secretsecret
 RELAY=wss://relay.getalby.com/v1
+PUBLIC_RELAY=
 PORT=8080

README.md

@@ -45,6 +45,7 @@ To build the CSS run:
 - `NOSTR_PRIVKEY`: the private key of this service. Should be a securely randomly generated 32 byte hex string.
 - `CLIENT_NOSTR_PUBKEY`: if set, this service will only listen to events authored by this public key. You can set this to your own nostr public key.
 - `RELAY`: default: "wss://relay.getalby.com/v1"
+- `PUBLIC_RELAY`: optional relay URL to be used in connection strings if `RELAY` is an internal URL
 - `LN_BACKEND_TYPE`: ALBY or LND
 - `ALBY_CLIENT_SECRET`= Alby OAuth client secret (used with the Alby backend)
 - `ALBY_CLIENT_ID`= Alby OAuth client ID (used with the Alby backend)

config.go

@@ -12,6 +12,7 @@ type Config struct {
 	CookieDomain            string `envconfig:"COOKIE_DOMAIN"`
 	ClientPubkey            string `envconfig:"CLIENT_NOSTR_PUBKEY"`
 	Relay                   string `envconfig:"RELAY" default:"wss://relay.getalby.com/v1"`
+	PublicRelay             string `envconfig:"PUBLIC_RELAY"`
 	LNBackendType           string `envconfig:"LN_BACKEND_TYPE" default:"ALBY"`
 	LNDAddress              string `envconfig:"LND_ADDRESS"`
 	LNDCertFile             string `envconfig:"LND_CERT_FILE"`

echo_handlers.go

@@ -405,9 +405,10 @@ func (svc *Service) AppsCreateHandler(c echo.Context) error {
 		return c.Redirect(302, "/apps")
 	}
 
-	// FIXME: need a public-facing relay URL env variable
-	// and fallback to svc.cfg.Relay (hosted instance uses an internal URL)
-	publicRelayUrl := "wss://relay.getalby.com/v1";
+	publicRelayUrl := svc.cfg.PublicRelay;
+	if (publicRelayUrl == "") {
+		publicRelayUrl = svc.cfg.Relay;
+	}
 
 	if c.FormValue("returnTo") != "" {
 		returnToUrl, err := url.Parse(c.FormValue("returnTo"))