diff --git a/ethereum/bcs/BREthereumBCS.c b/ethereum/bcs/BREthereumBCS.c
index 9c13a8b0b..a867e30a1 100644
--- a/ethereum/bcs/BREthereumBCS.c
+++ b/ethereum/bcs/BREthereumBCS.c
@@ -117,8 +117,8 @@ bcsCreateInitializeBlocks (BREthereumBCS bcs,
             bcs->chainTail = bcs->chain;
     }
 
-    array_free(sortedBlocks);
-    array_free(blocks);
+    array_free (sortedBlocks);
+    array_free (blocks);
 }
 
 static void
@@ -135,8 +135,10 @@ bcsCreateInitializeTransactions (BREthereumBCS bcs,
                 TRANSACTION_STATUS_ERRORED  == status.type ||
                 TRANSACTION_STATUS_PENDING  == status.type);
 
-        bcsSignalTransaction(bcs, transaction);
+        bcsSignalTransaction (bcs, transaction);
     }
+
+    array_free (transactions);
 }
 
 static void
@@ -153,8 +155,10 @@ bcsCreateInitializeLogs (BREthereumBCS bcs,
                 TRANSACTION_STATUS_ERRORED  == status.type ||
                 TRANSACTION_STATUS_PENDING  == status.type);
 
-        bcsSignalLog(bcs, log);
+        bcsSignalLog (bcs, log);
     }
+
+    array_free (logs);
 }
 
 extern BREthereumBCS
diff --git a/ethereum/bcs/BREthereumBCSEvent.c b/ethereum/bcs/BREthereumBCSEvent.c
index 897e5f5b9..2c73e6031 100644
--- a/ethereum/bcs/BREthereumBCSEvent.c
+++ b/ethereum/bcs/BREthereumBCSEvent.c
@@ -188,10 +188,16 @@ bcsHandleTransactionDispatcher (BREventHandler ignore,
     bcsHandleTransaction(event->bcs, event->transaction);
 }
 
+static void
+bcsHandleTransactionDestroyer (BREthereumHandleTransactionEvent *event) {
+    transactionRelease(event->transaction);
+}
+
 static BREventType handleTransactionEventType = {
     "BCS: Handle Transaction Event",
     sizeof (BREthereumHandleTransactionEvent),
-    (BREventDispatcher) bcsHandleTransactionDispatcher
+    (BREventDispatcher) bcsHandleTransactionDispatcher,
+    (BREventDestroyer) bcsHandleTransactionDestroyer
 };
 
 extern void
@@ -219,10 +225,16 @@ bcsHandleLogDispatcher (BREventHandler ignore,
                  event->log);
 }
 
+static void
+bcsHandleLogDestroyer (BREthereumHandleLogEvent *event) {
+    logRelease(event->log);
+}
+
 static BREventType handleLogEventType = {
     "BCS: Handle Log Event",
     sizeof (BREthereumHandleLogEvent),
-    (BREventDispatcher) bcsHandleLogDispatcher
+    (BREventDispatcher) bcsHandleLogDispatcher,
+    (BREventDestroyer) bcsHandleLogDestroyer
 };
 
 extern void
@@ -297,6 +309,7 @@ bcsSyncHandleProvisionDispatcher (BREventHandler ignore,
 
 static void
 bcsSyncHandleProvisionDestroyer (BREthereumHandleProvisionEvent *event) {
+    // syncRangeRelease (event->range);
     // provisionResultRelease(event->result);
 }
 
diff --git a/ethereum/ewm/BREthereumEWMClientEvent.c b/ethereum/ewm/BREthereumEWMClientEvent.c
index ce69038b5..0829f873e 100644
--- a/ethereum/ewm/BREthereumEWMClientEvent.c
+++ b/ethereum/ewm/BREthereumEWMClientEvent.c
@@ -467,10 +467,16 @@ ewmClientSignalAnnounceTransactionDispatcher (BREventHandler ignore,
     ewmClientHandleAnnounceTransaction(event->ewm, event->bundle, event->rid);
 }
 
+static void
+ewmClientSignalAnnounceTransactionDestroyer (BREthereumEWMClientAnnounceTransactionEvent *event) {
+    ewmClientAnnounceTransactionBundleRelease(event->bundle);
+}
+
 static BREventType ewmClientAnnounceTransactionEventType = {
     "EWM: Client Announce Transaction Event",
     sizeof (BREthereumEWMClientAnnounceTransactionEvent),
-    (BREventDispatcher) ewmClientSignalAnnounceTransactionDispatcher
+    (BREventDispatcher) ewmClientSignalAnnounceTransactionDispatcher,
+    (BREventDestroyer) ewmClientSignalAnnounceTransactionDestroyer
 };
 
 extern void
@@ -498,10 +504,16 @@ ewmClientSignalAnnounceLogDispatcher (BREventHandler ignore,
     ewmClientHandleAnnounceLog(event->ewm, event->bundle, event->rid);
 }
 
+static void
+ewmClientSignalAnnounceLogDestroyer (BREthereumEWMClientAnnounceLogEvent *event) {
+    ewmClientAnnounceLogBundleRelease(event->bundle);
+}
+
 static BREventType ewmClientAnnounceLogEventType = {
     "EWM: Client Announce Log Event",
     sizeof (BREthereumEWMClientAnnounceLogEvent),
-    (BREventDispatcher) ewmClientSignalAnnounceLogDispatcher
+    (BREventDispatcher) ewmClientSignalAnnounceLogDispatcher,
+    (BREventDestroyer) ewmClientSignalAnnounceLogDestroyer
 };
 
 extern void
@@ -529,10 +541,16 @@ ewmClientSignalAnnounceTokenDispatcher (BREventHandler ignore,
     ewmClientHandleAnnounceToken(event->ewm, event->bundle, event->rid);
 }
 
+static void
+ewmClientSignalAnnounceTokenDestroyer (BREthereumEWMClientAnnounceTokenEvent *event) {
+    ewmClientAnnounceTokenBundleRelease(event->bundle);
+}
+
 static BREventType ewmClientAnnounceTokenEventType = {
     "EWM: Client Announce Token Event",
     sizeof (BREthereumEWMClientAnnounceTokenEvent),
-    (BREventDispatcher) ewmClientSignalAnnounceTokenDispatcher
+    (BREventDispatcher) ewmClientSignalAnnounceTokenDispatcher,
+    (BREventDestroyer) ewmClientSignalAnnounceTokenDestroyer
 };
 
 extern void