package core import ( "github.com/CityOfZion/neo-go/pkg/smartcontract" "github.com/CityOfZion/neo-go/pkg/util" "github.com/CityOfZion/neo-go/pkg/vm" "github.com/CityOfZion/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.APPCALL, opcode.TAILCALL: return toFixed8(10) case opcode.SYSCALL: interopID := vm.GetInteropID(parameter) return getSyscallPrice(v, interopID) case opcode.SHA1, opcode.SHA256: return toFixed8(10) case opcode.HASH160, opcode.HASH256: return toFixed8(20) case opcode.CHECKSIG, opcode.VERIFY: return toFixed8(100) case opcode.CHECKMULTISIG: estack := v.Estack() if estack.Len() == 0 { return toFixed8(1) } var cost int item := estack.Peek(0) switch item.Item().(type) { case *vm.ArrayItem, *vm.StructItem: cost = len(item.Array()) default: cost = int(item.BigInt().Int64()) } if cost < 1 { return toFixed8(1) } return toFixed8(int64(100 * cost)) 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 ( neoAssetCreate = 0x1fc6c583 // Neo.Asset.Create antSharesAssetCreate = 0x99025068 // AntShares.Asset.Create neoAssetRenew = 0x71908478 // Neo.Asset.Renew antSharesAssetRenew = 0xaf22447b // AntShares.Asset.Renew neoContractCreate = 0x6ea56cf6 // Neo.Contract.Create neoContractMigrate = 0x90621b47 // Neo.Contract.Migrate antSharesContractCreate = 0x2a28d29b // AntShares.Contract.Create antSharesContractMigrate = 0xa934c8bb // AntShares.Contract.Migrate systemStoragePut = 0x84183fe6 // System.Storage.Put systemStoragePutEx = 0x3a9be173 // System.Storage.PutEx neoStoragePut = 0xf541a152 // Neo.Storage.Put antSharesStoragePut = 0x5f300a9e // AntShares.Storage.Put ) estack := v.Estack() switch id { case neoAssetCreate, antSharesAssetCreate: return util.Fixed8FromInt64(5000) case neoAssetRenew, antSharesAssetRenew: arg := estack.Peek(1).BigInt().Int64() return util.Fixed8FromInt64(arg * 5000) case neoContractCreate, neoContractMigrate, antSharesContractCreate, antSharesContractMigrate: fee := int64(100) props := smartcontract.PropertyState(estack.Peek(3).BigInt().Int64()) if props&smartcontract.HasStorage != 0 { fee += 400 } if props&smartcontract.HasDynamicInvoke != 0 { fee += 500 } return util.Fixed8FromInt64(fee) case systemStoragePut, systemStoragePutEx, neoStoragePut, antSharesStoragePut: // 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) } }