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/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/util" "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.New() bc := ic.Chain.(*Blockchain) vm.SetScriptGetter(func(hash util.Uint160) ([]byte, bool) { if c := bc.contracts.ByHash(hash); c != nil { meta := c.Metadata() return meta.Script, (meta.Manifest.Features&smartcontract.HasDynamicInvoke != 0) } cs, err := ic.DAO.GetContractState(hash) if err != nil { return nil, false } hasDynamicInvoke := (cs.Properties & smartcontract.HasDynamicInvoke) != 0 return cs.Script, hasDynamicInvoke }) vm.RegisterInteropGetter(getSystemInterop(ic)) vm.RegisterInteropGetter(getNeoInterop(ic)) vm.RegisterInteropGetter(bc.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} } return nil } } // All lists are sorted, keep 'em this way, please. var systemInterops = []interop.Function{ {Name: "System.Block.GetTransaction", Func: blockGetTransaction, Price: 1}, {Name: "System.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1}, {Name: "System.Block.GetTransactions", Func: blockGetTransactions, Price: 1}, {Name: "System.Blockchain.GetBlock", Func: bcGetBlock, Price: 200}, {Name: "System.Blockchain.GetContract", Func: bcGetContract, Price: 100}, {Name: "System.Blockchain.GetHeader", Func: bcGetHeader, Price: 100}, {Name: "System.Blockchain.GetHeight", Func: bcGetHeight, Price: 1}, {Name: "System.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 200}, {Name: "System.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 100}, {Name: "System.Contract.Destroy", Func: contractDestroy, Price: 1}, {Name: "System.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1}, {Name: "System.ExecutionEngine.GetCallingScriptHash", Func: engineGetCallingScriptHash, Price: 1}, {Name: "System.ExecutionEngine.GetEntryScriptHash", Func: engineGetEntryScriptHash, Price: 1}, {Name: "System.ExecutionEngine.GetExecutingScriptHash", Func: engineGetExecutingScriptHash, Price: 1}, {Name: "System.ExecutionEngine.GetScriptContainer", Func: engineGetScriptContainer, Price: 1}, {Name: "System.Header.GetHash", Func: headerGetHash, Price: 1}, {Name: "System.Header.GetIndex", Func: headerGetIndex, Price: 1}, {Name: "System.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1}, {Name: "System.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1}, {Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 200}, {Name: "System.Runtime.Deserialize", Func: runtimeDeserialize, Price: 1}, {Name: "System.Runtime.GetTime", Func: runtimeGetTime, Price: 1}, {Name: "System.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 1}, {Name: "System.Runtime.Log", Func: runtimeLog, Price: 1}, {Name: "System.Runtime.Notify", Func: runtimeNotify, Price: 1}, {Name: "System.Runtime.Platform", Func: runtimePlatform, Price: 1}, {Name: "System.Runtime.Serialize", Func: runtimeSerialize, Price: 1}, {Name: "System.Storage.Delete", Func: storageDelete, Price: 100}, {Name: "System.Storage.Get", Func: storageGet, Price: 100}, {Name: "System.Storage.GetContext", Func: storageGetContext, Price: 1}, {Name: "System.Storage.GetReadOnlyContext", Func: storageGetReadOnlyContext, Price: 1}, {Name: "System.Storage.Put", Func: storagePut, Price: 0}, // These don't have static price in C# code. {Name: "System.Storage.PutEx", Func: storagePutEx, Price: 0}, {Name: "System.StorageContext.AsReadOnly", Func: storageContextAsReadOnly, Price: 1}, {Name: "System.Transaction.GetHash", Func: txGetHash, Price: 1}, } var neoInterops = []interop.Function{ {Name: "Neo.Account.GetBalance", Func: accountGetBalance, Price: 1}, {Name: "Neo.Account.GetScriptHash", Func: accountGetScriptHash, Price: 1}, {Name: "Neo.Account.IsStandard", Func: accountIsStandard, Price: 100}, {Name: "Neo.Asset.Create", Func: assetCreate, Price: 0}, {Name: "Neo.Asset.GetAdmin", Func: assetGetAdmin, Price: 1}, {Name: "Neo.Asset.GetAmount", Func: assetGetAmount, Price: 1}, {Name: "Neo.Asset.GetAssetId", Func: assetGetAssetID, Price: 1}, {Name: "Neo.Asset.GetAssetType", Func: assetGetAssetType, Price: 1}, {Name: "Neo.Asset.GetAvailable", Func: assetGetAvailable, Price: 1}, {Name: "Neo.Asset.GetIssuer", Func: assetGetIssuer, Price: 1}, {Name: "Neo.Asset.GetOwner", Func: assetGetOwner, Price: 1}, {Name: "Neo.Asset.GetPrecision", Func: assetGetPrecision, Price: 1}, {Name: "Neo.Asset.Renew", Func: assetRenew, Price: 0}, {Name: "Neo.Attribute.GetData", Func: attrGetData, Price: 1}, {Name: "Neo.Attribute.GetUsage", Func: attrGetUsage, Price: 1}, {Name: "Neo.Block.GetTransaction", Func: blockGetTransaction, Price: 1}, {Name: "Neo.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1}, {Name: "Neo.Block.GetTransactions", Func: blockGetTransactions, Price: 1}, {Name: "Neo.Blockchain.GetAccount", Func: bcGetAccount, Price: 100}, {Name: "Neo.Blockchain.GetAsset", Func: bcGetAsset, Price: 100}, {Name: "Neo.Blockchain.GetBlock", Func: bcGetBlock, Price: 200}, {Name: "Neo.Blockchain.GetContract", Func: bcGetContract, Price: 100}, {Name: "Neo.Blockchain.GetHeader", Func: bcGetHeader, Price: 100}, {Name: "Neo.Blockchain.GetHeight", Func: bcGetHeight, Price: 1}, {Name: "Neo.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 100}, {Name: "Neo.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 100}, {Name: "Neo.Contract.Create", Func: contractCreate, Price: 0}, {Name: "Neo.Contract.Destroy", Func: contractDestroy, Price: 1}, {Name: "Neo.Contract.GetScript", Func: contractGetScript, Price: 1}, {Name: "Neo.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1}, {Name: "Neo.Contract.IsPayable", Func: contractIsPayable, Price: 1}, {Name: "Neo.Contract.Migrate", Func: contractMigrate, Price: 0}, {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.Enumerator.Concat", Func: enumerator.Concat, Price: 1}, {Name: "Neo.Enumerator.Create", Func: enumerator.Create, Price: 1}, {Name: "Neo.Enumerator.Next", Func: enumerator.Next, Price: 1}, {Name: "Neo.Enumerator.Value", Func: enumerator.Value, Price: 1}, {Name: "Neo.Header.GetHash", Func: headerGetHash, Price: 1}, {Name: "Neo.Header.GetIndex", Func: headerGetIndex, Price: 1}, {Name: "Neo.Header.GetMerkleRoot", Func: headerGetMerkleRoot, Price: 1}, {Name: "Neo.Header.GetNextConsensus", Func: headerGetNextConsensus, Price: 1}, {Name: "Neo.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1}, {Name: "Neo.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1}, {Name: "Neo.Header.GetVersion", Func: headerGetVersion, Price: 1}, {Name: "Neo.Input.GetHash", Func: inputGetHash, Price: 1}, {Name: "Neo.Input.GetIndex", Func: inputGetIndex, Price: 1}, {Name: "Neo.InvocationTransaction.GetScript", Func: invocationTxGetScript, Price: 1}, {Name: "Neo.Iterator.Concat", Func: iterator.Concat, Price: 1}, {Name: "Neo.Iterator.Create", Func: iterator.Create, Price: 1}, {Name: "Neo.Iterator.Key", Func: iterator.Key, Price: 1}, {Name: "Neo.Iterator.Keys", Func: iterator.Keys, Price: 1}, {Name: "Neo.Iterator.Values", Func: iterator.Values, Price: 1}, {Name: "Neo.Native.Deploy", Func: native.Deploy, Price: 1}, {Name: "Neo.Output.GetAssetId", Func: outputGetAssetID, Price: 1}, {Name: "Neo.Output.GetScriptHash", Func: outputGetScriptHash, Price: 1}, {Name: "Neo.Output.GetValue", Func: outputGetValue, Price: 1}, {Name: "Neo.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 200}, {Name: "Neo.Runtime.Deserialize", Func: runtimeDeserialize, Price: 1}, {Name: "Neo.Runtime.GetTime", Func: runtimeGetTime, Price: 1}, {Name: "Neo.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 1}, {Name: "Neo.Runtime.Log", Func: runtimeLog, Price: 1}, {Name: "Neo.Runtime.Notify", Func: runtimeNotify, Price: 1}, {Name: "Neo.Runtime.Serialize", Func: runtimeSerialize, Price: 1}, {Name: "Neo.Storage.Delete", Func: storageDelete, Price: 100}, {Name: "Neo.Storage.Find", Func: storageFind, Price: 1}, {Name: "Neo.Storage.Get", Func: storageGet, Price: 100}, {Name: "Neo.Storage.GetContext", Func: storageGetContext, Price: 1}, {Name: "Neo.Storage.GetReadOnlyContext", Func: storageGetReadOnlyContext, Price: 1}, {Name: "Neo.Storage.Put", Func: storagePut, Price: 0}, {Name: "Neo.StorageContext.AsReadOnly", Func: storageContextAsReadOnly, Price: 1}, {Name: "Neo.Transaction.GetAttributes", Func: txGetAttributes, Price: 1}, {Name: "Neo.Transaction.GetHash", Func: txGetHash, Price: 1}, {Name: "Neo.Transaction.GetInputs", Func: txGetInputs, Price: 1}, {Name: "Neo.Transaction.GetOutputs", Func: txGetOutputs, Price: 1}, {Name: "Neo.Transaction.GetReferences", Func: txGetReferences, Price: 200}, {Name: "Neo.Transaction.GetType", Func: txGetType, Price: 1}, {Name: "Neo.Transaction.GetUnspentCoins", Func: txGetUnspentCoins, Price: 200}, {Name: "Neo.Transaction.GetWitnesses", Func: txGetWitnesses, Price: 200}, {Name: "Neo.Witness.GetVerificationScript", Func: witnessGetVerificationScript, Price: 100}, // Aliases. {Name: "Neo.Iterator.Next", Func: enumerator.Next, Price: 1}, {Name: "Neo.Iterator.Value", Func: enumerator.Value, Price: 1}, // Old compatibility APIs. {Name: "AntShares.Account.GetBalance", Func: accountGetBalance, Price: 1}, {Name: "AntShares.Account.GetScriptHash", Func: accountGetScriptHash, Price: 1}, {Name: "AntShares.Asset.Create", Func: assetCreate, Price: 0}, {Name: "AntShares.Asset.GetAdmin", Func: assetGetAdmin, Price: 1}, {Name: "AntShares.Asset.GetAmount", Func: assetGetAmount, Price: 1}, {Name: "AntShares.Asset.GetAssetId", Func: assetGetAssetID, Price: 1}, {Name: "AntShares.Asset.GetAssetType", Func: assetGetAssetType, Price: 1}, {Name: "AntShares.Asset.GetAvailable", Func: assetGetAvailable, Price: 1}, {Name: "AntShares.Asset.GetIssuer", Func: assetGetIssuer, Price: 1}, {Name: "AntShares.Asset.GetOwner", Func: assetGetOwner, Price: 1}, {Name: "AntShares.Asset.GetPrecision", Func: assetGetPrecision, Price: 1}, {Name: "AntShares.Asset.Renew", Func: assetRenew, Price: 0}, {Name: "AntShares.Attribute.GetData", Func: attrGetData, Price: 1}, {Name: "AntShares.Attribute.GetUsage", Func: attrGetUsage, Price: 1}, {Name: "AntShares.Block.GetTransaction", Func: blockGetTransaction, Price: 1}, {Name: "AntShares.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1}, {Name: "AntShares.Block.GetTransactions", Func: blockGetTransactions, Price: 1}, {Name: "AntShares.Blockchain.GetAccount", Func: bcGetAccount, Price: 100}, {Name: "AntShares.Blockchain.GetAsset", Func: bcGetAsset, Price: 100}, {Name: "AntShares.Blockchain.GetBlock", Func: bcGetBlock, Price: 200}, {Name: "AntShares.Blockchain.GetContract", Func: bcGetContract, Price: 100}, {Name: "AntShares.Blockchain.GetHeader", Func: bcGetHeader, Price: 100}, {Name: "AntShares.Blockchain.GetHeight", Func: bcGetHeight, Price: 1}, {Name: "AntShares.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 100}, {Name: "AntShares.Contract.Create", Func: contractCreate, Price: 0}, {Name: "AntShares.Contract.Destroy", Func: contractDestroy, Price: 1}, {Name: "AntShares.Contract.GetScript", Func: contractGetScript, Price: 1}, {Name: "AntShares.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1}, {Name: "AntShares.Contract.Migrate", Func: contractMigrate, Price: 0}, {Name: "AntShares.Header.GetHash", Func: headerGetHash, Price: 1}, {Name: "AntShares.Header.GetMerkleRoot", Func: headerGetMerkleRoot, Price: 1}, {Name: "AntShares.Header.GetNextConsensus", Func: headerGetNextConsensus, Price: 1}, {Name: "AntShares.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1}, {Name: "AntShares.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1}, {Name: "AntShares.Header.GetVersion", Func: headerGetVersion, Price: 1}, {Name: "AntShares.Input.GetHash", Func: inputGetHash, Price: 1}, {Name: "AntShares.Input.GetIndex", Func: inputGetIndex, Price: 1}, {Name: "AntShares.Output.GetAssetId", Func: outputGetAssetID, Price: 1}, {Name: "AntShares.Output.GetScriptHash", Func: outputGetScriptHash, Price: 1}, {Name: "AntShares.Output.GetValue", Func: outputGetValue, Price: 1}, {Name: "AntShares.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 200}, {Name: "AntShares.Runtime.Log", Func: runtimeLog, Price: 1}, {Name: "AntShares.Runtime.Notify", Func: runtimeNotify, Price: 1}, {Name: "AntShares.Storage.Delete", Func: storageDelete, Price: 100}, {Name: "AntShares.Storage.Get", Func: storageGet, Price: 100}, {Name: "AntShares.Storage.GetContext", Func: storageGetContext, Price: 1}, {Name: "AntShares.Storage.Put", Func: storagePut, Price: 0}, {Name: "AntShares.Transaction.GetAttributes", Func: txGetAttributes, Price: 1}, {Name: "AntShares.Transaction.GetHash", Func: txGetHash, Price: 1}, {Name: "AntShares.Transaction.GetInputs", Func: txGetInputs, Price: 1}, {Name: "AntShares.Transaction.GetOutputs", Func: txGetOutputs, Price: 1}, {Name: "AntShares.Transaction.GetReferences", Func: txGetReferences, Price: 200}, {Name: "AntShares.Transaction.GetType", Func: txGetType, Price: 1}, } // 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) }