Update EIP-6110: add filtering by deposit event sig hash (#3122)

* Update EIP-6110: add filtering by deposit event sig hash

* lint

Author: jangko

execution_chain/core/eip6110.nim

@@ -1,5 +1,5 @@
 # Nimbus
-# Copyright (c) 2024 Status Research & Development GmbH
+# Copyright (c) 2024-2025 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
@@ -22,6 +22,7 @@ import
 
 const
   depositRequestSize = 192
+  DEPOSIT_EVENT_SIGNATURE_HASH = bytes32"0x649bbc62d0e31342afea4e5cd82d4049e7e1ee912fc0889aa790803be39038c5"
 
 type
   DepositRequest = array[depositRequestSize, byte]
@@ -73,7 +74,9 @@ func depositLogToRequest(data: openArray[byte]): DepositRequest =
 func parseDepositLogs*(logs: openArray[Log], depositContractAddress: Address): Result[seq[byte], string] =
   var res = newSeqOfCap[byte](logs.len*depositRequestSize)
   for i, log in logs:
-    if log.address != depositContractAddress:
+    let isDepositEvent = log.topics.len > 0 and
+                         log.topics[0] == DEPOSIT_EVENT_SIGNATURE_HASH
+    if not(log.address == depositContractAddress and isDepositEvent):
       continue
     if log.data.len != 576:
       return err("deposit wrong length: want 576, have " & $log.data.len)