add /status/open-channels/pubkeys endpoint

web/src/main/java/de/cotto/lndmanagej/controller/StatusController.java

@@ -2,29 +2,52 @@ package de.cotto.lndmanagej.controller;
 
 import com.codahale.metrics.MetricRegistry;
 import de.cotto.lndmanagej.controller.dto.ObjectMapperConfiguration;
+import de.cotto.lndmanagej.controller.dto.PubkeysDto;
 import de.cotto.lndmanagej.metrics.Metrics;
+import de.cotto.lndmanagej.model.LocalOpenChannel;
+import de.cotto.lndmanagej.model.Pubkey;
+import de.cotto.lndmanagej.service.ChannelService;
 import de.cotto.lndmanagej.service.OwnNodeService;
 import org.springframework.context.annotation.Import;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.List;
+import java.util.stream.Collectors;
+
 @RestController
 @RequestMapping("/api/status/")
 @Import(ObjectMapperConfiguration.class)
 public class StatusController {
     private final OwnNodeService ownNodeService;
+    private final ChannelService channelService;
     private final Metrics metrics;
 
-    public StatusController(OwnNodeService ownNodeService, Metrics metrics) {
+    public StatusController(OwnNodeService ownNodeService, ChannelService channelService, Metrics metrics) {
         this.ownNodeService = ownNodeService;
+        this.channelService = channelService;
         this.metrics = metrics;
     }
 
     @GetMapping("/synced-to-chain")
     public boolean isSyncedToChain() {
-        metrics.mark(MetricRegistry.name(getClass(), "isSyncedToChain"));
+        mark("isSyncedToChain");
         return ownNodeService.isSyncedToChain();
     }
 
+    @GetMapping("/open-channels/pubkeys")
+    public PubkeysDto getPubkeysForOpenChannels() {
+        mark("getPubkeysForOpenChannels");
+        List<Pubkey> pubkeys = channelService.getOpenChannels().stream()
+                .map(LocalOpenChannel::getRemotePubkey)
+                .sorted()
+                .distinct()
+                .collect(Collectors.toList());
+        return new PubkeysDto(pubkeys);
+    }
+
+    private void mark(String name) {
+        metrics.mark(MetricRegistry.name(getClass(), name));
+    }
 }

web/src/main/java/de/cotto/lndmanagej/controller/dto/PubkeysDto.java

@@ -0,0 +1,13 @@
+package de.cotto.lndmanagej.controller.dto;
+
+import de.cotto.lndmanagej.model.Pubkey;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public record PubkeysDto(List<String> pubkeys) {
+    public PubkeysDto(Collection<Pubkey> pubkeys) {
+        this(pubkeys.stream().map(Pubkey::toString).collect(Collectors.toList()));
+    }
+}