core/types: create libevm.go containing extras registration moved from state_account.go

Author: qdm12

core/types/libevm.go

@@ -0,0 +1,10 @@
+// (c) 2025, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package types
+
+import (
+	ethtypes "github.com/ava-labs/libevm/core/types"
+)
+
+var extras = ethtypes.RegisterExtras[ethtypes.NOOPHeaderHooks, *ethtypes.NOOPHeaderHooks, isMultiCoin]()

core/types/state_account.go

@@ -32,10 +32,7 @@ import (
 
 type isMultiCoin bool
 
-var (
-	extras              = ethtypes.RegisterExtras[ethtypes.NOOPHeaderHooks, *ethtypes.NOOPHeaderHooks, isMultiCoin]()
-	IsMultiCoinPayloads = extras.StateAccount
-)
+var IsMultiCoinPayloads = extras.StateAccount
 
 func IsMultiCoin(s ethtypes.StateOrSlimAccount) bool {
 	return bool(extras.StateAccount.Get(s))