From 7e9f7985615ca7f592fa06ae522cc78ce9da6d3e Mon Sep 17 00:00:00 2001
From: Elise Alix <elise@xmtp.com>
Date: Thu, 25 May 2023 13:43:26 -0400
Subject: [PATCH 1/2] feat: add canMessage to client

---
 .../java/expo/modules/xmtpreactnativesdk/XMTPModule.kt    | 6 ++++++
 example/src/HomeHeaderView.tsx                            | 6 ++++++
 ios/XMTPModule.swift                                      | 8 ++++++++
 src/index.ts                                              | 4 ++++
 src/lib/Client.ts                                         | 6 ++++++
 5 files changed, 30 insertions(+)

diff --git a/android/src/main/java/expo/modules/xmtpreactnativesdk/XMTPModule.kt b/android/src/main/java/expo/modules/xmtpreactnativesdk/XMTPModule.kt
index d740a24dc..2950ef364 100644
--- a/android/src/main/java/expo/modules/xmtpreactnativesdk/XMTPModule.kt
+++ b/android/src/main/java/expo/modules/xmtpreactnativesdk/XMTPModule.kt
@@ -129,6 +129,12 @@ class XMTPModule : Module() {
 
         //
         // Client API
+        AsyncFunction("canMessage") { clientAddress: String, peerAddress: String ->
+            val client = clients[clientAddress] ?: throw XMTPException("No client")
+
+            client.canMessage(peerAddress)
+        }
+
         AsyncFunction("listConversations") { clientAddress: String ->
             val client = clients[clientAddress] ?: throw XMTPException("No client")
             val conversationList = client.conversations.list()
diff --git a/example/src/HomeHeaderView.tsx b/example/src/HomeHeaderView.tsx
index 7e800845c..0cdb4fbaf 100644
--- a/example/src/HomeHeaderView.tsx
+++ b/example/src/HomeHeaderView.tsx
@@ -24,6 +24,12 @@ function NewConversationView({
   async function startConverstation() {
     setIsCreating(true);
     try {
+      const canMessage = await client.canMessage(address);
+      if (!canMessage) {
+        setIsCreating(false);
+        setErr(`${address} is not on the XMTP Network yet`);
+        return;
+      }
       const conversation = await client.conversations.newConversation(address);
       setIsCreating(false);
       onSuccess();
diff --git a/ios/XMTPModule.swift b/ios/XMTPModule.swift
index 94235d3b2..1299a0954 100644
--- a/ios/XMTPModule.swift
+++ b/ios/XMTPModule.swift
@@ -134,6 +134,14 @@ public class XMTPModule: Module {
 
 		//
 		// Client API
+		AsyncFunction("canMessage") { (clientAddress: String, peerAddress: String) -> Bool in
+			guard let client = clients[clientAddress] else {
+				throw Error.noClient
+			}
+
+			return try await client.canMessage(peerAddress)
+		}
+
 		AsyncFunction("listConversations") { (clientAddress: String) -> [String] in
 			guard let client = clients[clientAddress] else {
 				throw Error.noClient
diff --git a/src/index.ts b/src/index.ts
index b3689b240..585173d44 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -25,6 +25,10 @@ export async function createRandom(
   return await XMTPModule.createRandom(environment);
 }
 
+export async function canMessage(clientAddress: string, peerAddress: string): Promise<boolean> {
+  return await XMTPModule.canMessage(clientAddress, peerAddress)
+}
+
 export async function listConversations(
   clientAddress: string
 ): Promise<Conversation[]> {
diff --git a/src/lib/Client.ts b/src/lib/Client.ts
index 63be66f82..123c68b09 100644
--- a/src/lib/Client.ts
+++ b/src/lib/Client.ts
@@ -49,6 +49,12 @@ export class Client {
     return new Client(address);
   }
 
+  async canMessage(
+    peerAddress: string
+  ): Promise<boolean> {
+    return await XMTPModule.canMessage(this.address, peerAddress);
+  }
+
   constructor(address: string) {
     this.address = address;
     this.conversations = new Conversations(this);

From a8dd6024bddd0e0ca6dfbd0ba85b5d974632100f Mon Sep 17 00:00:00 2001
From: Elise Alix <elise@xmtp.com>
Date: Thu, 25 May 2023 15:37:58 -0400
Subject: [PATCH 2/2] add missing semi

---
 example/src/HomeHeaderView.tsx | 2 +-
 src/index.ts                   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/example/src/HomeHeaderView.tsx b/example/src/HomeHeaderView.tsx
index 0cdb4fbaf..10fe4cc03 100644
--- a/example/src/HomeHeaderView.tsx
+++ b/example/src/HomeHeaderView.tsx
@@ -27,7 +27,7 @@ function NewConversationView({
       const canMessage = await client.canMessage(address);
       if (!canMessage) {
         setIsCreating(false);
-        setErr(`${address} is not on the XMTP Network yet`);
+        setErr(`${address} is not on the XMTP network yet`);
         return;
       }
       const conversation = await client.conversations.newConversation(address);
diff --git a/src/index.ts b/src/index.ts
index 585173d44..ba977281a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -26,7 +26,7 @@ export async function createRandom(
 }
 
 export async function canMessage(clientAddress: string, peerAddress: string): Promise<boolean> {
-  return await XMTPModule.canMessage(clientAddress, peerAddress)
+  return await XMTPModule.canMessage(clientAddress, peerAddress);
 }
 
 export async function listConversations(