Improve Client creation and build performance

library/src/androidTest/java/org/xmtp/android/library/ClientTest.kt

@@ -1,5 +1,6 @@
 package org.xmtp.android.library
 
+import android.util.Log
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import kotlinx.coroutines.runBlocking
@@ -12,6 +13,7 @@ import org.xmtp.android.library.messages.PrivateKeyBuilder
 import org.xmtp.android.library.messages.walletAddress
 import uniffi.xmtpv3.GenericException
 import java.security.SecureRandom
+import java.util.Date
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.TimeUnit
 
@@ -474,4 +476,62 @@ class ClientTest {
             }
         }
     }
+
+    @Test
+    fun testCreatesADevClientPerformance() {
+        val key = SecureRandom().generateSeed(32)
+        val context = InstrumentationRegistry.getInstrumentation().targetContext
+        val fakeWallet = PrivateKeyBuilder()
+        val start = Date()
+        val client = runBlocking {
+            Client().create(
+                account = fakeWallet,
+                options = ClientOptions(
+                    ClientOptions.Api(XMTPEnvironment.DEV, true),
+                    appContext = context,
+                    dbEncryptionKey = key
+                )
+            )
+        }
+        val end = Date()
+        val time1 = end.time - start.time
+        Log.d("PERF", "Created a client in ${time1 / 1000.0}s")
+
+        val start2 = Date()
+        val buildClient1 = runBlocking {
+            Client().build(
+                fakeWallet.address,
+                options = ClientOptions(
+                    ClientOptions.Api(XMTPEnvironment.DEV, true),
+                    appContext = context,
+                    dbEncryptionKey = key
+                )
+            )
+        }
+        val end2 = Date()
+        val time2 = end2.time - start2.time
+        Log.d("PERF", "Built a client in ${time2 / 1000.0}s")
+
+        val start3 = Date()
+        val buildClient2 = runBlocking {
+            Client().build(
+                fakeWallet.address,
+                options = ClientOptions(
+                    ClientOptions.Api(XMTPEnvironment.DEV, true),
+                    appContext = context,
+                    dbEncryptionKey = key
+                ),
+                inboxId =  client.inboxId
+            )
+        }
+        val end3 = Date()
+        val time3 = end3.time - start3.time
+        Log.d("PERF", "Built a client with inboxId in ${time3 / 1000.0}s")
+
+        assert(time2 < time1)
+        assert(time3 < time1)
+        assert(time3 < time2)
+        assertEquals(client.inboxId, buildClient1.inboxId)
+        assertEquals(client.inboxId, buildClient2.inboxId)
+    }
 }

library/src/main/java/org/xmtp/android/library/Client.kt

@@ -101,13 +101,14 @@ class Client() {
         address: String,
         clientOptions: ClientOptions,
         signingKey: SigningKey? = null,
+        inboxId: String? = null
     ): Client {
         val accountAddress = address.lowercase()
-        val inboxId = getOrCreateInboxId(clientOptions.api, accountAddress)
+        val recoveredInboxId = inboxId ?: getOrCreateInboxId(clientOptions.api, accountAddress)
 
         val (ffiClient, dbPath) = createFfiClient(
             accountAddress,
-            inboxId,
+            recoveredInboxId,
             clientOptions,
             signingKey,
             clientOptions.appContext,
@@ -139,9 +140,10 @@ class Client() {
     suspend fun build(
         address: String,
         options: ClientOptions,
+        inboxId: String? = null
     ): Client {
         return try {
-            initializeV3Client(address, options)
+            initializeV3Client(address, options, inboxId = inboxId)
         } catch (e: Exception) {
             throw XMTPException("Error creating V3 client: ${e.message}", e)
         }
@@ -188,7 +190,6 @@ class Client() {
                 ?: throw XMTPException("No signer passed but signer was required.")
             ffiClient.registerIdentity(signatureRequest)
         }
-
         return Pair(ffiClient, dbPath)
     }
 

library/src/main/java/org/xmtp/android/library/messages/PrivateKey.kt

@@ -71,12 +71,14 @@ class PrivateKeyBuilder : SigningKey {
             )
         val signatureKey = KeyUtil.getSignatureBytes(signatureData)
 
-        return SignatureOuterClass.Signature.newBuilder().also {
+        val sign = SignatureOuterClass.Signature.newBuilder().also {
             it.ecdsaCompact = it.ecdsaCompact.toBuilder().also { builder ->
                 builder.bytes = signatureKey.take(64).toByteArray().toByteString()
                 builder.recovery = signatureKey[64].toInt()
             }.build()
         }.build()
+
+        return sign
     }
 
     override suspend fun sign(message: String): SignatureOuterClass.Signature {