Merge pull request #366 from xmtp/em/beta/who-added-me

Who Added Me Feature Implementation

android/src/main/java/expo/modules/xmtpreactnativesdk/XMTPModule.kt

@@ -804,6 +804,15 @@ class XMTPModule : Module() {
             }
         }
 
+        AsyncFunction("addedByAddress") Coroutine { clientAddress: String, id: String ->
+            withContext(Dispatchers.IO) {
+                logV("addedByAddress")
+                val group = findGroup(clientAddress, id) ?: throw XMTPException("No group found")
+
+                group.addedByAddress()
+            }
+        }
+
         AsyncFunction("isGroupAdmin") Coroutine { clientAddress: String, id: String ->
             withContext(Dispatchers.IO) {
                 logV("isGroupAdmin")

example/src/tests/groupTests.ts

@@ -205,6 +205,22 @@ test('production MLS V3 client creation throws error', async () => {
   )
 })
 
+test('who added me to a group', async () => {
+  const [alixClient, boClient] = await createClients(2)
+  const alixGroup = await alixClient.conversations.newGroup([
+    boClient.address,
+   ])
+
+  const boGroup = (await boClient.conversations.listGroups())[0]
+  const addedByAddress = await boGroup.addedByAddress()
+
+  assert(
+    addedByAddress.toLocaleLowerCase === alixClient.address.toLocaleLowerCase,
+    `addedByAddress ${addedByAddress} does not match ${alixClient.address}`
+  )
+  return true
+})
+
 test('can message in a group', async () => {
   // Create three MLS enabled Clients
   const [alixClient, boClient, caroClient] = await createClients(3)

ios/XMTPModule.swift

@@ -703,7 +703,15 @@ public class XMTPModule: Module {
 
 			return try group.isActive()
 		}
-
+
+		AsyncFunction("addedByAddress") { (clientAddress: String, id: String) -> String in
+			guard let group = try await findGroup(clientAddress: clientAddress, id: id) else {
+				throw Error.conversationNotFound("no group found for \(id)")
+			}
+
+			return try group.addedByAddress()
+		}
+
 		AsyncFunction("isGroupAdmin") { (clientAddress: String, id: String) -> Bool in
 			guard let client = await clientsManager.getClient(key: clientAddress) else {
 				throw Error.noClient

src/index.ts

@@ -665,6 +665,13 @@ export async function isGroupActive(
   return XMTPModule.isGroupActive(clientAddress, id)
 }
 
+export async function addedByAddress(
+  clientAddress: string,
+  id: string
+): Promise<string> {
+  return XMTPModule.addedByAddress(clientAddress, id)
+}
+
 export async function isGroupAdmin(
   clientAddress: string,
   id: string

src/lib/Group.ts

@@ -203,6 +203,10 @@ export class Group<
     return XMTP.isGroupActive(this.client.address, this.id)
   }
 
+  addedByAddress(): Promise<string> {
+    return XMTP.addedByAddress(this.client.address, this.id)
+  }
+
   async isAdmin(): Promise<boolean> {
     return XMTP.isGroupAdmin(this.client.address, this.id)
   }