Reject system deposit transactions in Regolith

core/error.go

@@ -100,4 +100,7 @@ var (
 
 	// ErrSenderNoEOA is returned if the sender of a transaction is a contract.
 	ErrSenderNoEOA = errors.New("sender not an eoa")
+
+	// ErrSystemTxNotSupported is returned for any deposit tx with IsSystemTx=true after the Regolith fork
+	ErrSystemTxNotSupported = errors.New("system tx not supported")
 )

core/state_transition.go

@@ -259,6 +259,10 @@ func (st *StateTransition) preCheck() error {
 		st.gas += st.msg.Gas() // Add gas here in order to be able to execute calls.
 		// Don't touch the gas pool for system transactions
 		if st.msg.IsSystemTx() {
+			if st.evm.ChainConfig().IsOptimismRegolith(st.evm.Context.Time) {
+				return fmt.Errorf("%w: address %v", ErrSystemTxNotSupported,
+					st.msg.From().Hex())
+			}
 			return nil
 		}
 		return st.gp.SubGas(st.msg.Gas()) // gas used by deposits may not be used by other txs