core, tests: reduced state copy by N calls

Reduced the amount of state copied that are required by N calls by doing
a balance check prior to any state modifications.

1 files changed, 3 insertions, 0 deletions

diff --git a/cmd/evm/main.go b/cmd/evm/main.go
index 7dd375b14..be6546c95 100644
--- a/cmd/evm/main.go
+++ b/cmd/evm/main.go
@@ -206,6 +206,9 @@ func (self *VMEnv) StructLogs() []vm.StructLog {
 func (self *VMEnv) AddLog(log *state.Log) {
 	self.state.AddLog(log)
 }
+func (self *VMEnv) CanTransfer(from vm.Account, balance *big.Int) bool {
+	return from.Balance().Cmp(balance) >= 0
+}
 func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
 	return vm.Transfer(from, to, amount)
 }