feat: adds ability to export libxmtp logs from native to react native

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

@@ -66,7 +66,9 @@ import org.xmtp.proto.message.contents.Invitation.ConsentProofPayload
 import org.xmtp.proto.message.contents.PrivateKeyOuterClass
 import uniffi.xmtpv3.org.xmtp.android.library.libxmtp.GroupPermissionPreconfiguration
 import uniffi.xmtpv3.org.xmtp.android.library.libxmtp.PermissionOption
+import java.io.BufferedReader
 import java.io.File
+import java.io.InputStreamReader
 import java.util.Date
 import java.util.UUID
 import kotlin.coroutines.Continuation
@@ -1564,13 +1566,29 @@ class XMTPModule : Module() {
             val client = clients[inboxId] ?: throw XMTPException("No client")
             client.contacts.isGroupAllowed(groupId)
         }
-
         AsyncFunction("isGroupDenied") { inboxId: String, groupId: String ->
             logV("isGroupDenied")
             val client = clients[inboxId] ?: throw XMTPException("No client")
             client.contacts.isGroupDenied(groupId)
         }
-    }
+
+        AsyncFunction("exportNativeLogs") Coroutine { ->
+            withContext(Dispatchers.IO) {
+                try {
+                    val process = Runtime.getRuntime().exec("logcat -d")
+                    val bufferedReader = BufferedReader(InputStreamReader(process.inputStream))
+
+                    val log = StringBuilder()
+                    var line: String?
+                    while (bufferedReader.readLine().also { line = it } != null) {
+                        log.append(line).append("\n")
+                    }
+                    log.toString()
+                } catch (e: Exception) {
+                    e.message
+                }
+            }
+        }
 
     //
     // Helpers

example/src/tests/groupTests.ts

@@ -1,12 +1,8 @@
+import { Wallet } from 'ethers'
 import RNFS from 'react-native-fs'
 import { DecodedMessage } from 'xmtp-react-native-sdk/lib/DecodedMessage'
 
-import {
-  Test,
-  assert,
-  createClients,
-  delayToPropogate,
-} from './test-utils'
+import { Test, assert, createClients, delayToPropogate } from './test-utils'
 import {
   Client,
   Conversation,
@@ -17,7 +13,6 @@ import {
   GroupUpdatedContent,
   GroupUpdatedCodec,
 } from '../../../src/index'
-import { Wallet } from 'ethers'
 
 export const groupTests: Test[] = []
 let counter = 1

example/src/tests/tests.ts

@@ -8,7 +8,7 @@ import { PrivateKeyAccount } from 'viem'
 import { generatePrivateKey, privateKeyToAccount } from 'viem/accounts'
 import { DecodedMessage } from 'xmtp-react-native-sdk/lib/DecodedMessage'
 
-import { Test, assert, delayToPropogate } from './test-utils'
+import { Test, assert, createClients, delayToPropogate } from './test-utils'
 import {
   Query,
   JSContentCodec,
@@ -1526,3 +1526,13 @@ test('can start conversations without consent proofs', async () => {
   await delayToPropogate()
   return true
 })
+
+test('can export logs', async () => {
+  await createClients(2)
+
+  const logs = await Client.exportNativeLogs()
+  console.log(logs)
+  assert(logs.includes('libxmtp'), 'should be able to read libxmtp logs')
+
+  return true
+})

ios/XMTPModule.swift

@@ -1,6 +1,7 @@
 import ExpoModulesCore
 import XMTP
 import LibXMTP
+import OSLog
 
 extension Conversation {
 	static func cacheKeyForTopic(inboxId: String, topic: String) -> String {
@@ -1459,6 +1460,21 @@ public class XMTPModule: Module {
 		  }
 		  return await client.contacts.isGroupDenied(groupId: groupId)
 		}
+
+		AsyncFunction("exportNativeLogs") { () -> String in
+			var logOutput = ""
+			let logStore = try OSLogStore(scope: .currentProcessIdentifier)
+			let position = logStore.position(timeIntervalSinceLatestBoot: -600) // Last 10 min of logs
+			let entries = try logStore.getEntries(at: position)
+
+			for entry in entries {
+				if let logEntry = entry as? OSLogEntryLog {
+					logOutput.append("\(logEntry.date): \(logEntry.composedMessage)\n")
+				}
+			}
+
+			return logOutput
+		}
 	}
 
 	//

src/index.ts

@@ -1149,6 +1149,10 @@ export async function processWelcomeMessage<
   return new Group(client, JSON.parse(json))
 }
 
+export async function exportNativeLogs() {
+  return XMTPModule.exportNativeLogs()
+}
+
 export const emitter = new EventEmitter(XMTPModule ?? NativeModulesProxy.XMTP)
 
 interface AuthParams {

src/lib/Client.ts

@@ -147,6 +147,10 @@ export class Client<
     })
   }
 
+  static async exportNativeLogs() {
+    return XMTPModule.exportNativeLogs()
+  }
+
   private static removeAllSubscriptions(
     createSubscription?: Subscription,
     enableSubscription?: Subscription,