Use EpochSecondSerializer for UserRemoteConfigList.serverEpochTime

service/src/main/java/org/whispersystems/textsecuregcm/util/InstantAdapter.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.util;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import java.io.IOException;
+import java.time.Instant;
+
+public class InstantAdapter {
+
+  public static class EpochSecondSerializer extends JsonSerializer<Instant> {
+
+    @Override
+    public void serialize(final Instant value, final JsonGenerator gen, final SerializerProvider serializers)
+        throws IOException {
+
+      gen.writeNumber(value.getEpochSecond());
+    }
+  }
+
+}