mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-23 03:38:35 +00:00
64 lines
1.9 KiB
Go
64 lines
1.9 KiB
Go
package core
|
|
|
|
import (
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
|
|
)
|
|
|
|
// interopGasRatio is a multiplier by which a number returned from price getter
|
|
// and Fixed8 amount of GAS differ. Numbers defined in syscall tables are a multiple
|
|
// of 0.001 GAS = Fixed8(10^5).
|
|
const interopGasRatio = 100000
|
|
|
|
// getPrice returns a price for executing op with the provided parameter.
|
|
// Some SYSCALLs have variable price depending on their arguments.
|
|
func getPrice(v *vm.VM, op opcode.Opcode, parameter []byte) util.Fixed8 {
|
|
if op <= opcode.NOP {
|
|
return 0
|
|
}
|
|
|
|
switch op {
|
|
case opcode.SYSCALL:
|
|
interopID := vm.GetInteropID(parameter)
|
|
return getSyscallPrice(v, interopID)
|
|
default:
|
|
return toFixed8(1)
|
|
}
|
|
}
|
|
|
|
func toFixed8(n int64) util.Fixed8 {
|
|
return util.Fixed8(n * interopGasRatio)
|
|
}
|
|
|
|
// getSyscallPrice returns cost of executing syscall with provided id.
|
|
// Is SYSCALL is not found, cost is 1.
|
|
func getSyscallPrice(v *vm.VM, id uint32) util.Fixed8 {
|
|
ifunc := v.GetInteropByID(id)
|
|
if ifunc != nil && ifunc.Price > 0 {
|
|
return toFixed8(int64(ifunc.Price))
|
|
}
|
|
|
|
const (
|
|
neoContractCreate = 0x6ea56cf6 // Neo.Contract.Create
|
|
neoContractMigrate = 0x90621b47 // Neo.Contract.Migrate
|
|
systemStoragePut = 0x84183fe6 // System.Storage.Put
|
|
systemStoragePutEx = 0x3a9be173 // System.Storage.PutEx
|
|
neoStoragePut = 0xf541a152 // Neo.Storage.Put
|
|
)
|
|
|
|
estack := v.Estack()
|
|
|
|
switch id {
|
|
case neoContractCreate, neoContractMigrate:
|
|
return smartcontract.GetDeploymentPrice(smartcontract.PropertyState(estack.Peek(3).BigInt().Int64()))
|
|
case systemStoragePut, systemStoragePutEx, neoStoragePut:
|
|
// price for storage PUT is 1 GAS per 1 KiB
|
|
keySize := len(estack.Peek(1).Bytes())
|
|
valSize := len(estack.Peek(2).Bytes())
|
|
return util.Fixed8FromInt64(int64((keySize+valSize-1)/1024 + 1))
|
|
default:
|
|
return util.Fixed8FromInt64(1)
|
|
}
|
|
}
|