112 lines
3.4 KiB
Go
112 lines
3.4 KiB
Go
package core
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import (
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"github.com/CityOfZion/neo-go/pkg/smartcontract"
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"github.com/CityOfZion/neo-go/pkg/util"
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"github.com/CityOfZion/neo-go/pkg/vm"
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"github.com/CityOfZion/neo-go/pkg/vm/opcode"
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)
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// interopGasRatio is a multiplier by which a number returned from price getter
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// and Fixed8 amount of GAS differ. Numbers defined in syscall tables are a multiple
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// of 0.001 GAS = Fixed8(10^5).
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const interopGasRatio = 100000
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// getPrice returns a price for executing op with the provided parameter.
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// Some SYSCALLs have variable price depending on their arguments.
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func getPrice(v *vm.VM, op opcode.Opcode, parameter []byte) util.Fixed8 {
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if op <= opcode.NOP {
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return 0
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}
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switch op {
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case opcode.APPCALL, opcode.TAILCALL:
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return util.Fixed8FromInt64(10)
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case opcode.SYSCALL:
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interopID := vm.GetInteropID(parameter)
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return getSyscallPrice(v, interopID)
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case opcode.SHA1, opcode.SHA256:
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return util.Fixed8FromInt64(10)
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case opcode.HASH160, opcode.HASH256:
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return util.Fixed8FromInt64(20)
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case opcode.CHECKSIG, opcode.VERIFY:
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return util.Fixed8FromInt64(100)
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case opcode.CHECKMULTISIG:
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estack := v.Estack()
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if estack.Len() == 0 {
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return util.Fixed8FromInt64(1)
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}
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var cost int
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item := estack.Peek(0)
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switch item.Item().(type) {
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case *vm.ArrayItem, *vm.StructItem:
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cost = len(item.Array())
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default:
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cost = int(item.BigInt().Int64())
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}
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if cost < 1 {
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return util.Fixed8FromInt64(1)
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}
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return util.Fixed8FromInt64(int64(100 * cost))
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default:
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return util.Fixed8FromInt64(1)
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}
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}
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// getSyscallPrice returns cost of executing syscall with provided id.
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// Is SYSCALL is not found, cost is 1.
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func getSyscallPrice(v *vm.VM, id uint32) util.Fixed8 {
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ifunc := v.GetInteropByID(id)
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if ifunc != nil && ifunc.Price > 0 {
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return util.Fixed8(ifunc.Price) * interopGasRatio
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}
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const (
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neoAssetCreate = 0x1fc6c583 // Neo.Asset.Create
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antSharesAssetCreate = 0x99025068 // AntShares.Asset.Create
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neoAssetRenew = 0x71908478 // Neo.Asset.Renew
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antSharesAssetRenew = 0xaf22447b // AntShares.Asset.Renew
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neoContractCreate = 0x6ea56cf6 // Neo.Contract.Create
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neoContractMigrate = 0x90621b47 // Neo.Contract.Migrate
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antSharesContractCreate = 0x2a28d29b // AntShares.Contract.Create
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antSharesContractMigrate = 0xa934c8bb // AntShares.Contract.Migrate
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systemStoragePut = 0x84183fe6 // System.Storage.Put
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systemStoragePutEx = 0x3a9be173 // System.Storage.PutEx
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neoStoragePut = 0xf541a152 // Neo.Storage.Put
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antSharesStoragePut = 0x5f300a9e // AntShares.Storage.Put
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)
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estack := v.Estack()
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switch id {
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case neoAssetCreate, antSharesAssetCreate:
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return util.Fixed8FromInt64(5000)
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case neoAssetRenew, antSharesAssetRenew:
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arg := estack.Peek(1).BigInt().Int64()
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return util.Fixed8FromInt64(arg * 5000)
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case neoContractCreate, neoContractMigrate, antSharesContractCreate, antSharesContractMigrate:
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fee := int64(100)
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props := smartcontract.PropertyState(estack.Peek(3).BigInt().Int64())
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if props&smartcontract.HasStorage != 0 {
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fee += 400
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}
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if props&smartcontract.HasDynamicInvoke != 0 {
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fee += 500
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}
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return util.Fixed8FromInt64(fee)
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case systemStoragePut, systemStoragePutEx, neoStoragePut, antSharesStoragePut:
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// price for storage PUT is 1 GAS per 1 KiB
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keySize := len(estack.Peek(1).Bytes())
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valSize := len(estack.Peek(2).Bytes())
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return util.Fixed8FromInt64(int64((keySize+valSize-1)/1024 + 1))
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default:
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return util.Fixed8FromInt64(1)
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}
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}
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