feat: adjust federation fetch endpoint to new spec without iss param

modules/federation-server/build.gradle.kts

@@ -19,6 +19,7 @@ dependencies {
     api(projects.modules.openapi)
     api(projects.modules.openidFederationCommon)
     api(projects.modules.persistence)
+    api(projects.modules.services)
     implementation(libs.springboot.actuator)
     implementation(libs.springboot.web)
     implementation(libs.springboot.data.jdbc)

modules/federation-server/src/main/kotlin/com/sphereon/oid/fed/server/federation/controllers/FederationController.kt

@@ -1,7 +1,7 @@
 package com.sphereon.oid.fed.server.federation.controllers
 
 import com.sphereon.oid.fed.persistence.Persistence
-import com.sphereon.oid.fed.server.federation.services.SubordinateService
+import com.sphereon.oid.fed.services.SubordinateService
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.PathVariable
 import org.springframework.web.bind.annotation.RequestMapping
@@ -49,12 +49,12 @@ class FederationController {
     }
 
     @GetMapping("/fetch", produces = ["application/entity-statement+jwt"])
-    fun getRootSubordinateStatement(@RequestParam("iss") iss: String, @RequestParam("sub") sub: String): String {
-        return subordinateService.fetchSubordinateStatement(iss, sub)
+    fun getRootSubordinateStatement(@RequestParam("sub") sub: String): String {
+        return subordinateService.fetchSubordinateStatementByUsernameAndSubject("root", sub)
     }
 
     @GetMapping("/{username}/fetch", produces = ["application/entity-statement+jwt"])
-    fun getSubordinateStatement(@RequestParam("iss") iss: String, @RequestParam("sub") sub: String): String {
-        return subordinateService.fetchSubordinateStatement(iss, sub)
+    fun getSubordinateStatement(@PathVariable username: String, @RequestParam("sub") sub: String): String {
+        return subordinateService.fetchSubordinateStatementByUsernameAndSubject(username, sub)
     }
 }

modules/openapi/src/commonMain/kotlin/com/sphereon/oid/fed/openapi/openapi.yaml

@@ -175,15 +175,8 @@ paths:
       tags:
         - federation
       summary: Fetch Subordinate Statement
-      description: Fetch the Subordinate Statement issued by a specified entity `iss` for a subordinate entity `sub``.
+      description: Fetch the Subordinate Statement for a subordinate entity `sub``.
       parameters:
-        - name: iss
-          in: query
-          description: The issuer identifier (URI) of the entity that issues the Subordinate Statement.
-          required: true
-          schema:
-            type: string
-            format: uri
         - name: sub
           in: query
           description: The subject identifier (URI) of the entity for whom the Subordinate Statement is created.

modules/services/src/commonMain/kotlin/com/sphereon/oid/fed/services/SubordinateService.kt

@@ -243,4 +243,16 @@ class SubordinateService {
 
         return deletedMetadata.toSubordinateMetadataDTO()
     }
+
+    fun fetchSubordinateStatementByUsernameAndSubject(username: String, sub: String): String {
+        val account = accountQueries.findByUsername(username).executeAsOne()
+
+        val accountIss = accountService.getAccountIdentifier(account.username)
+
+        val subordinateStatement =
+            Persistence.subordinateStatementQueries.findByIssAndSub(accountIss, sub).executeAsOneOrNull()
+                ?: throw IllegalArgumentException(Constants.SUBORDINATE_STATEMENT_NOT_FOUND)
+
+        return subordinateStatement.statement
+    }
 }