package core /* Interops are designed to run under VM's execute() panic protection, so it's OK for them to do things like smth := v.Estack().Pop().Bytes() even though technically Pop() can return a nil pointer. */ import ( "sort" "github.com/nspcc-dev/neo-go/pkg/core/interop" "github.com/nspcc-dev/neo-go/pkg/core/interop/crypto" "github.com/nspcc-dev/neo-go/pkg/core/interop/enumerator" "github.com/nspcc-dev/neo-go/pkg/core/interop/iterator" "github.com/nspcc-dev/neo-go/pkg/core/interop/json" "github.com/nspcc-dev/neo-go/pkg/core/interop/runtime" "github.com/nspcc-dev/neo-go/pkg/core/native" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger" "github.com/nspcc-dev/neo-go/pkg/vm" "github.com/nspcc-dev/neo-go/pkg/vm/emit" ) // SpawnVM returns a VM with script getter and interop functions set // up for current blockchain. func SpawnVM(ic *interop.Context) *vm.VM { vm := vm.NewWithTrigger(ic.Trigger) vm.RegisterInteropGetter(getSystemInterop(ic)) vm.RegisterInteropGetter(getNeoInterop(ic)) if ic.Chain != nil { vm.RegisterInteropGetter(ic.Chain.(*Blockchain).contracts.GetNativeInterop(ic)) } return vm } // getSystemInterop returns matching interop function from the System namespace // for a given id in the current context. func getSystemInterop(ic *interop.Context) vm.InteropGetterFunc { return getInteropFromSlice(ic, systemInterops) } // getNeoInterop returns matching interop function from the Neo and AntShares // namespaces for a given id in the current context. func getNeoInterop(ic *interop.Context) vm.InteropGetterFunc { return getInteropFromSlice(ic, neoInterops) } // getInteropFromSlice returns matching interop function from the given slice of // interop functions in the current context. func getInteropFromSlice(ic *interop.Context, slice []interop.Function) func(uint32) *vm.InteropFuncPrice { return func(id uint32) *vm.InteropFuncPrice { n := sort.Search(len(slice), func(i int) bool { return slice[i].ID >= id }) if n < len(slice) && slice[n].ID == id { return &vm.InteropFuncPrice{ Func: func(v *vm.VM) error { return slice[n].Func(ic, v) }, Price: slice[n].Price, RequiredFlags: slice[n].RequiredFlags, } } return nil } } // All lists are sorted, keep 'em this way, please. var systemInterops = []interop.Function{ {Name: "System.Binary.Deserialize", Func: runtimeDeserialize, Price: 500000}, {Name: "System.Binary.Serialize", Func: runtimeSerialize, Price: 100000}, {Name: "System.Blockchain.GetBlock", Func: bcGetBlock, Price: 2500000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Blockchain.GetContract", Func: bcGetContract, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Blockchain.GetHeight", Func: bcGetHeight, Price: 400, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Blockchain.GetTransactionFromBlock", Func: bcGetTransactionFromBlock, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Contract.Call", Func: contractCall, Price: 1000000, AllowedTriggers: trigger.System | trigger.Application, RequiredFlags: smartcontract.AllowCall}, {Name: "System.Contract.CallEx", Func: contractCallEx, Price: 1000000, AllowedTriggers: trigger.System | trigger.Application, RequiredFlags: smartcontract.AllowCall}, {Name: "System.Contract.Create", Func: contractCreate, Price: 0, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, {Name: "System.Contract.CreateStandardAccount", Func: contractCreateStandardAccount, Price: 10000}, {Name: "System.Contract.Destroy", Func: contractDestroy, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, {Name: "System.Contract.IsStandard", Func: contractIsStandard, Price: 30000}, {Name: "System.Contract.Update", Func: contractUpdate, Price: 0, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, {Name: "System.Enumerator.Concat", Func: enumerator.Concat, Price: 400}, {Name: "System.Enumerator.Create", Func: enumerator.Create, Price: 400}, {Name: "System.Enumerator.Next", Func: enumerator.Next, Price: 1000000}, {Name: "System.Enumerator.Value", Func: enumerator.Value, Price: 400}, {Name: "System.Iterator.Concat", Func: iterator.Concat, Price: 400}, {Name: "System.Iterator.Create", Func: iterator.Create, Price: 400}, {Name: "System.Iterator.Key", Func: iterator.Key, Price: 400}, {Name: "System.Iterator.Keys", Func: iterator.Keys, Price: 400}, {Name: "System.Iterator.Values", Func: iterator.Values, Price: 400}, {Name: "System.Json.Deserialize", Func: json.Deserialize, Price: 500000}, {Name: "System.Json.Serialize", Func: json.Serialize, Price: 100000}, {Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 30000}, {Name: "System.Runtime.GasLeft", Func: runtime.GasLeft, Price: 400}, {Name: "System.Runtime.GetCallingScriptHash", Func: engineGetCallingScriptHash, Price: 400}, {Name: "System.Runtime.GetEntryScriptHash", Func: engineGetEntryScriptHash, Price: 400}, {Name: "System.Runtime.GetExecutingScriptHash", Func: engineGetExecutingScriptHash, Price: 400}, {Name: "System.Runtime.GetInvocationCounter", Func: runtime.GetInvocationCounter, Price: 400}, {Name: "System.Runtime.GetScriptContainer", Func: engineGetScriptContainer, Price: 250}, {Name: "System.Runtime.GetTime", Func: runtimeGetTime, Price: 250, AllowedTriggers: trigger.Application}, {Name: "System.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 250}, {Name: "System.Runtime.Log", Func: runtimeLog, Price: 1000000, RequiredFlags: smartcontract.AllowNotify}, {Name: "System.Runtime.Notify", Func: runtimeNotify, Price: 1000000, RequiredFlags: smartcontract.AllowNotify}, {Name: "System.Runtime.Platform", Func: runtimePlatform, Price: 250}, {Name: "System.Storage.Delete", Func: storageDelete, Price: StoragePrice, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, {Name: "System.Storage.Find", Func: storageFind, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Storage.Get", Func: storageGet, Price: 1000000, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Storage.GetContext", Func: storageGetContext, Price: 400, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Storage.GetReadOnlyContext", Func: storageGetReadOnlyContext, Price: 400, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, {Name: "System.Storage.Put", Func: storagePut, Price: 0, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, // These don't have static price in C# code. {Name: "System.Storage.PutEx", Func: storagePutEx, Price: 0, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, {Name: "System.Storage.AsReadOnly", Func: storageContextAsReadOnly, Price: 400, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates}, } var neoInterops = []interop.Function{ {Name: "Neo.Crypto.ECDsaVerify", Func: crypto.ECDSAVerify, Price: 1}, {Name: "Neo.Crypto.ECDsaCheckMultiSig", Func: crypto.ECDSACheckMultisig, Price: 1}, {Name: "Neo.Crypto.SHA256", Func: crypto.Sha256, Price: 1}, {Name: "Neo.Native.Deploy", Func: native.Deploy, Price: 1, AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates}, } // initIDinInteropsSlice initializes IDs from names in one given // Function slice and then sorts it. func initIDinInteropsSlice(iops []interop.Function) { for i := range iops { iops[i].ID = emit.InteropNameToID([]byte(iops[i].Name)) } sort.Slice(iops, func(i, j int) bool { return iops[i].ID < iops[j].ID }) } // init initializes IDs in the global interop slices. func init() { initIDinInteropsSlice(systemInterops) initIDinInteropsSlice(neoInterops) }