add AdapterContractController

src/main/java/no/fintlabs/provider/register/AdapterContractController.java

@@ -0,0 +1,22 @@
+package no.fintlabs.provider.register;
+
+import lombok.RequiredArgsConstructor;
+import no.fintlabs.provider.security.AdapterContractContext;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Set;
+
+@RestController
+@RequiredArgsConstructor
+public class AdapterContractController {
+
+    private final AdapterContractContext adapterContractContext;
+
+    @GetMapping("/adapter")
+    public ResponseEntity<Set<String>> getAdapterIds() {
+        return ResponseEntity.ok(adapterContractContext.getAdapterIds());
+    }
+
+}