forked from TrueCloudLab/neoneo-go
bbd802681e
That's how it was intended to behave originally. One thing questionable here is contract price (policy thing, basically) being moved to smartcontract package, but it's probably fine for NEO 2.0 (as it won't change) and we'll make something better for NEO 3.0.
105 lines
3.3 KiB
Go
105 lines
3.3 KiB
Go
package core
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import (
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/nspcc-dev/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 toFixed8(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 toFixed8(10)
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case opcode.HASH160, opcode.HASH256:
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return toFixed8(20)
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case opcode.CHECKSIG, opcode.VERIFY:
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return toFixed8(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 toFixed8(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 toFixed8(1)
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}
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return toFixed8(int64(100 * cost))
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default:
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return toFixed8(1)
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}
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}
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func toFixed8(n int64) util.Fixed8 {
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return util.Fixed8(n * interopGasRatio)
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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 toFixed8(int64(ifunc.Price))
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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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return smartcontract.GetDeploymentPrice(smartcontract.PropertyState(estack.Peek(3).BigInt().Int64()))
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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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