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authorobscuren <geffobscura@gmail.com>2014-03-24 20:20:34 +0800
committerobscuren <geffobscura@gmail.com>2014-03-24 20:20:34 +0800
commite0b6091d7ef709902f534c1a4b57151f0171e03c (patch)
tree290fa26d9da264a5e365816a80c42f325adb51ef /ethchain/vm.go
parent6a86c517c4f4b372cad0ae1d92e926a482eac5ba (diff)
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Test fixes and removed old code. Added VM gas fees
Diffstat (limited to 'ethchain/vm.go')
-rw-r--r--ethchain/vm.go48
1 files changed, 45 insertions, 3 deletions
diff --git a/ethchain/vm.go b/ethchain/vm.go
index 126592b25..9b6807925 100644
--- a/ethchain/vm.go
+++ b/ethchain/vm.go
@@ -10,6 +10,17 @@ import (
"math/big"
)
+var (
+ GasStep = big.NewInt(1)
+ GasSha = big.NewInt(20)
+ GasSLoad = big.NewInt(20)
+ GasSStore = big.NewInt(100)
+ GasBalance = big.NewInt(20)
+ GasCreate = big.NewInt(100)
+ GasCall = big.NewInt(20)
+ GasMemory = big.NewInt(1)
+)
+
type Vm struct {
txPool *TxPool
// Stack for processing contracts
@@ -70,10 +81,41 @@ func (vm *Vm) RunClosure(closure *Closure) []byte {
}
// TODO Get each instruction cost properly
- fee := new(big.Int)
- fee.Add(fee, big.NewInt(1000))
+ gas := new(big.Int)
+ useGas := func(amount *big.Int) {
+ gas.Add(gas, amount)
+ }
+
+ switch op {
+ case oSHA3:
+ useGas(GasSha)
+ case oSLOAD:
+ useGas(GasSLoad)
+ case oSSTORE:
+ var mult *big.Int
+ y, x := stack.Peekn()
+ val := closure.GetMem(x)
+ if val.IsEmpty() && len(y.Bytes()) > 0 {
+ mult = ethutil.Big2
+ } else if !val.IsEmpty() && len(y.Bytes()) == 0 {
+ mult = ethutil.Big0
+ } else {
+ mult = ethutil.Big1
+ }
+ useGas(base.Mul(mult, GasSStore))
+ case oBALANCE:
+ useGas(GasBalance)
+ case oCREATE:
+ useGas(GasCreate)
+ case oCALL:
+ useGas(GasCall)
+ case oMLOAD, oMSIZE, oMSTORE8, oMSTORE:
+ useGas(GasMemory)
+ default:
+ useGas(GasStep)
+ }
- if closure.Gas.Cmp(fee) < 0 {
+ if closure.Gas.Cmp(gas) < 0 {
return closure.Return(nil)
}