feat: add chain data source and address to about page

api/api.go

@@ -1242,6 +1242,22 @@ func (api *api) GetInfo(ctx context.Context) (*InfoResponse, error) {
 		}
 
 		info.Network = nodeInfo.Network
+		switch backendType {
+		case config.LDKBackendType:
+			// Only LDK supports this right now. Using a local interface here
+			// so we don't have to bloat the main LNClient interface for everyone else.
+			type chainSourceProvider interface {
+				GetChainDataSource() (string, string)
+			}
+
+			if ldkService, ok := api.svc.GetLNClient().(chainSourceProvider); ok {
+				info.ChainDataSourceType, info.ChainDataSourceAddress = ldkService.GetChainDataSource()
+			}
+
+		case config.LNDBackendType:
+			info.ChainDataSourceType = "lnd"
+			info.ChainDataSourceAddress, _ = api.cfg.Get("LNDAddress", "")
+		}
 	}
 
 	info.NextBackupReminder, _ = api.cfg.Get("NextBackupReminder", "")

api/models.go

@@ -297,6 +297,8 @@ type InfoResponse struct {
 	Relays                      []InfoResponseRelay `json:"relays"`
 	NodeAlias                   string              `json:"nodeAlias"`
 	MempoolUrl                  string              `json:"mempoolUrl"`
+	ChainDataSourceType         string              `json:"chainDataSourceType,omitempty"`
+	ChainDataSourceAddress      string              `json:"chainDataSourceAddress,omitempty"`
 }
 
 type UpdateSettingsRequest struct {

frontend/src/screens/settings/About.tsx

@@ -41,6 +41,21 @@ export function About() {
             {info.backendType}
           </p>
         </div>
+        {info.chainDataSourceType && (
+          <div className="grid gap-2">
+            <p className="font-medium text-sm">Chain Data Source</p>
+            <div className="flex flex-col gap-1">
+              <p className="text-muted-foreground text-sm capitalize">
+                {info.chainDataSourceType}
+              </p>
+              {info.chainDataSourceAddress && (
+                <p className="text-muted-foreground text-xs font-mono break-all opacity-70">
+                  {info.chainDataSourceAddress}
+                </p>
+              )}
+            </div>
+          </div>
+        )}
         <div className="grid gap-2">
           <p className="font-medium text-sm">Nostr Relays</p>
           {info.relays.map((relay) => (

frontend/src/types.ts

@@ -164,6 +164,8 @@ export interface InfoResponse {
   nodeAlias: string;
   mempoolUrl: string;
   bitcoinDisplayFormat: BitcoinDisplayFormat;
+  chainDataSourceType?: string;
+  chainDataSourceAddress?: string;
 }
 
 export type BitcoinDisplayFormat = "sats" | "bip177";

lnclient/ldk/ldk.go

@@ -2511,3 +2511,16 @@ func (ls *LDKService) ConsumeEvent(ctx context.Context, event *events.Event, glo
 		ls.backupChannels()
 	}
 }
+
+func (ls *LDKService) GetChainDataSource() (string, string) {
+	if host := ls.cfg.GetEnv().LDKBitcoindRpcHost; host != "" {
+		return "bitcoind", host
+	}
+	if host := ls.cfg.GetEnv().LDKElectrumServer; host != "" {
+		return "electrum", host
+	}
+
+	// Fallback to Esplora
+	host := ls.cfg.GetEnv().LDKEsploraServer
+	return "esplora", host
+}