diff --git a/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt b/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
index 26a2ad896..cb0d1fffc 100644
--- a/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
+++ b/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
@@ -10,19 +10,17 @@ package net.mamoe.mirai.console
  */
 
 import kotlinx.coroutines.runBlocking
+import net.mamoe.mirai.Bot
+import net.mamoe.mirai.alsoLogin
 import net.mamoe.mirai.api.http.MiraiHttpAPIServer
 import net.mamoe.mirai.api.http.generateSessionKey
-import net.mamoe.mirai.contact.sendMessage
 import net.mamoe.mirai.console.plugins.PluginManager
 import net.mamoe.mirai.console.plugins.loadAsConfig
 import net.mamoe.mirai.console.plugins.withDefaultWrite
 import net.mamoe.mirai.console.plugins.withDefaultWriteSave
-import net.mamoe.mirai.Bot
-import net.mamoe.mirai.alsoLogin
+import net.mamoe.mirai.contact.sendMessage
 import net.mamoe.mirai.utils.SimpleLogger
-import org.bouncycastle.jce.provider.BouncyCastleProvider
 import java.io.File
-import java.security.Security
 import java.util.*
 import java.util.concurrent.LinkedBlockingQueue
 import kotlin.concurrent.thread
@@ -307,10 +305,6 @@ class MiraiConsoleLoader {
     companion object {
         @JvmStatic
         fun main(args: Array<String>) {
-            Security.removeProvider("BC")
-            Security.addProvider(BouncyCastleProvider())
-            Security.addProvider(org.bouncycastle.jce.provider.BouncyCastleProvider())
-            //Security.addProvider(BouncyCastle)
             MiraiConsoleUI.start()
             MiraiConsole.start()
             Runtime.getRuntime().addShutdownHook(thread(start = false) {
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/MessageSubscribers.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/MessageSubscribers.kt
index bc4a87a1b..fa748655b 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/MessageSubscribers.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/MessageSubscribers.kt
@@ -12,6 +12,8 @@
 package net.mamoe.mirai.event
 
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.channels.ReceiveChannel
 import net.mamoe.mirai.Bot
 import net.mamoe.mirai.contact.isAdministrator
 import net.mamoe.mirai.contact.isOperator
@@ -125,6 +127,17 @@ inline fun <R> Bot.subscribeFriendMessages(crossinline listeners: MessageSubscri
     }.run(listeners)
 }
 
+/**
+ * 返回一个指定事件的接收通道
+ */
+inline fun <reified E : Event> Bot.incoming(): ReceiveChannel<E> {
+    return Channel<E>(8).apply {
+        subscribeAlways<E> {
+            send(this)
+        }
+    }
+}
+
 
 /**
  * 消息事件的处理器.
diff --git a/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/cryptor/ECDHJvm.kt b/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/cryptor/ECDHJvm.kt
index b0abdf991..0d6e93829 100644
--- a/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/cryptor/ECDHJvm.kt
+++ b/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/cryptor/ECDHJvm.kt
@@ -43,13 +43,12 @@ actual fun ECDH() = ECDH(ECDH.generateKeyPair())
 actual class ECDH actual constructor(actual val keyPair: ECDHKeyPair) {
     actual companion object {
         private var isECDHAvailable = true
+
         init {
-            if (kotlin.runCatching {
-                    Security.addProvider(BouncyCastleProvider())
-                    generateKeyPair() // try if it is working
-                }.exceptionOrNull() == null) {
-                isECDHAvailable = true
-            }
+            isECDHAvailable = kotlin.runCatching {
+                Security.addProvider(BouncyCastleProvider())
+                generateKeyPair() // try if it is working
+            }.isSuccess
         }
 
         actual fun generateKeyPair(): ECDHKeyPair {