Setup recaptcha client interface

service/src/main/java/org/whispersystems/textsecuregcm/recaptcha/EnterpriseRecaptchaClient.java

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2021 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.recaptcha;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class EnterpriseRecaptchaClient implements RecaptchaClient {
+  private static final Logger logger = LoggerFactory.getLogger(EnterpriseRecaptchaClient.class);
+
+  @Override
+  public boolean verify(final String token, final String ip) {
+    return false;
+  }
+}

service/src/main/java/org/whispersystems/textsecuregcm/recaptcha/LegacyRecaptchaClient.java

@@ -18,7 +18,7 @@ import javax.ws.rs.client.Entity;
 import javax.ws.rs.core.MultivaluedHashMap;
 import javax.ws.rs.core.MultivaluedMap;
 
-public class LegacyRecaptchaClient {
+public class LegacyRecaptchaClient implements RecaptchaClient {
 
   private final Logger logger = LoggerFactory.getLogger(LegacyRecaptchaClient.class);
 

service/src/main/java/org/whispersystems/textsecuregcm/recaptcha/RecaptchaClient.java

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2021 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.recaptcha;
+
+public interface RecaptchaClient {
+  boolean verify(String token, String ip);
+}