mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-30 09:33:36 +00:00
212cf44e26
It's more logically correct as Blockchain can be several transactions behind in terms of its state.
757 lines
21 KiB
Go
757 lines
21 KiB
Go
package core
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import (
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"errors"
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"fmt"
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"math"
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"github.com/CityOfZion/neo-go/pkg/core/state"
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"github.com/CityOfZion/neo-go/pkg/core/transaction"
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"github.com/CityOfZion/neo-go/pkg/crypto/keys"
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"github.com/CityOfZion/neo-go/pkg/smartcontract"
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"github.com/CityOfZion/neo-go/pkg/smartcontract/trigger"
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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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gherr "github.com/pkg/errors"
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)
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const (
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// MaxContractScriptSize is the maximum script size for a contract.
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MaxContractScriptSize = 1024 * 1024
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// MaxContractParametersNum is the maximum number of parameters for a contract.
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MaxContractParametersNum = 252
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// MaxContractStringLen is the maximum length for contract metadata strings.
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MaxContractStringLen = 252
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// MaxAssetNameLen is the maximum length of asset name.
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MaxAssetNameLen = 1024
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// MaxAssetPrecision is the maximum precision of asset.
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MaxAssetPrecision = 8
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// BlocksPerYear is a multiplier for asset renewal.
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BlocksPerYear = 2000000
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// DefaultAssetLifetime is the default lifetime of an asset (which differs
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// from assets created by register tx).
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DefaultAssetLifetime = 1 + BlocksPerYear
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)
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// txInOut is used to pushed one key-value pair from References() onto the stack.
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type txInOut struct {
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in transaction.Input
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out transaction.Output
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}
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// headerGetVersion returns version from the header.
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func (ic *interopContext) headerGetVersion(v *vm.VM) error {
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header, err := popHeaderFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(header.Version)
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return nil
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}
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// headerGetConsensusData returns consensus data from the header.
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func (ic *interopContext) headerGetConsensusData(v *vm.VM) error {
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header, err := popHeaderFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(header.ConsensusData)
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return nil
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}
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// headerGetMerkleRoot returns version from the header.
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func (ic *interopContext) headerGetMerkleRoot(v *vm.VM) error {
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header, err := popHeaderFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(header.MerkleRoot.BytesLE())
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return nil
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}
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// headerGetNextConsensus returns version from the header.
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func (ic *interopContext) headerGetNextConsensus(v *vm.VM) error {
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header, err := popHeaderFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(header.NextConsensus.BytesLE())
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return nil
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}
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// txGetAttributes returns current transaction attributes.
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func (ic *interopContext) txGetAttributes(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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if len(tx.Attributes) > vm.MaxArraySize {
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return errors.New("too many attributes")
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}
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attrs := make([]vm.StackItem, 0, len(tx.Attributes))
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for i := range tx.Attributes {
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attrs = append(attrs, vm.NewInteropItem(&tx.Attributes[i]))
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}
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v.Estack().PushVal(attrs)
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return nil
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}
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// txGetInputs returns current transaction inputs.
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func (ic *interopContext) txGetInputs(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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if len(tx.Inputs) > vm.MaxArraySize {
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return errors.New("too many inputs")
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}
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inputs := make([]vm.StackItem, 0, len(tx.Inputs))
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for i := range tx.Inputs {
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inputs = append(inputs, vm.NewInteropItem(&tx.Inputs[i]))
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}
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v.Estack().PushVal(inputs)
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return nil
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}
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// txGetOutputs returns current transaction outputs.
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func (ic *interopContext) txGetOutputs(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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if len(tx.Outputs) > vm.MaxArraySize {
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return errors.New("too many outputs")
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}
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outputs := make([]vm.StackItem, 0, len(tx.Outputs))
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for i := range tx.Outputs {
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outputs = append(outputs, vm.NewInteropItem(&tx.Outputs[i]))
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}
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v.Estack().PushVal(outputs)
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return nil
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}
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// txGetReferences returns current transaction references.
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func (ic *interopContext) txGetReferences(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return fmt.Errorf("type mismatch: %T is not a Transaction", txInterface)
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}
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refs := ic.bc.References(tx)
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if len(refs) > vm.MaxArraySize {
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return errors.New("too many references")
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}
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stackrefs := make([]vm.StackItem, 0, len(refs))
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for _, k := range tx.Inputs {
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tio := txInOut{k, *refs[k]}
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stackrefs = append(stackrefs, vm.NewInteropItem(tio))
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}
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v.Estack().PushVal(stackrefs)
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return nil
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}
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// txGetType returns current transaction type.
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func (ic *interopContext) txGetType(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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v.Estack().PushVal(int(tx.Type))
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return nil
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}
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// txGetUnspentCoins returns current transaction unspent coins.
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func (ic *interopContext) txGetUnspentCoins(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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ucs, err := ic.dao.GetUnspentCoinState(tx.Hash())
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if err != nil {
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return errors.New("no unspent coin state found")
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}
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v.Estack().PushVal(vm.NewInteropItem(ucs))
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return nil
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}
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// txGetWitnesses returns current transaction witnesses.
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func (ic *interopContext) txGetWitnesses(v *vm.VM) error {
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txInterface := v.Estack().Pop().Value()
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tx, ok := txInterface.(*transaction.Transaction)
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if !ok {
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return errors.New("value is not a transaction")
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}
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if len(tx.Scripts) > vm.MaxArraySize {
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return errors.New("too many outputs")
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}
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scripts := make([]vm.StackItem, 0, len(tx.Scripts))
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for i := range tx.Scripts {
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scripts = append(scripts, vm.NewInteropItem(&tx.Scripts[i]))
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}
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v.Estack().PushVal(scripts)
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return nil
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}
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// bcGetValidators returns validators.
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func (ic *interopContext) bcGetValidators(v *vm.VM) error {
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validators := ic.dao.GetValidators()
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v.Estack().PushVal(validators)
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return nil
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}
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// popInputFromVM returns transaction.Input from the first estack element.
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func popInputFromVM(v *vm.VM) (*transaction.Input, error) {
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inInterface := v.Estack().Pop().Value()
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input, ok := inInterface.(*transaction.Input)
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if !ok {
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txio, ok := inInterface.(txInOut)
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if !ok {
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return nil, fmt.Errorf("type mismatch: %T is not an Input or txInOut", inInterface)
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}
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input = &txio.in
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}
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return input, nil
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}
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// inputGetHash returns hash from the given input.
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func (ic *interopContext) inputGetHash(v *vm.VM) error {
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input, err := popInputFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(input.PrevHash.BytesBE())
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return nil
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}
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// inputGetIndex returns index from the given input.
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func (ic *interopContext) inputGetIndex(v *vm.VM) error {
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input, err := popInputFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(input.PrevIndex)
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return nil
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}
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// popOutputFromVM returns transaction.Input from the first estack element.
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func popOutputFromVM(v *vm.VM) (*transaction.Output, error) {
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outInterface := v.Estack().Pop().Value()
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output, ok := outInterface.(*transaction.Output)
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if !ok {
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txio, ok := outInterface.(txInOut)
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if !ok {
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return nil, fmt.Errorf("type mismatch: %T is not an Output or txInOut", outInterface)
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}
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output = &txio.out
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}
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return output, nil
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}
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// outputGetAssetId returns asset ID from the given output.
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func (ic *interopContext) outputGetAssetID(v *vm.VM) error {
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output, err := popOutputFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(output.AssetID.BytesBE())
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return nil
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}
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// outputGetScriptHash returns scripthash from the given output.
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func (ic *interopContext) outputGetScriptHash(v *vm.VM) error {
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output, err := popOutputFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(output.ScriptHash.BytesBE())
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return nil
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}
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// outputGetValue returns value (amount) from the given output.
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func (ic *interopContext) outputGetValue(v *vm.VM) error {
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output, err := popOutputFromVM(v)
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if err != nil {
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return err
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}
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v.Estack().PushVal(int64(output.Amount))
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return nil
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}
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// attrGetData returns tx attribute data.
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func (ic *interopContext) attrGetData(v *vm.VM) error {
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attrInterface := v.Estack().Pop().Value()
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attr, ok := attrInterface.(*transaction.Attribute)
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if !ok {
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return fmt.Errorf("%T is not an attribute", attr)
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}
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v.Estack().PushVal(attr.Data)
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return nil
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}
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// attrGetData returns tx attribute usage field.
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func (ic *interopContext) attrGetUsage(v *vm.VM) error {
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attrInterface := v.Estack().Pop().Value()
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attr, ok := attrInterface.(*transaction.Attribute)
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if !ok {
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return fmt.Errorf("%T is not an attribute", attr)
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}
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v.Estack().PushVal(int(attr.Usage))
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return nil
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}
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// bcGetAccount returns or creates an account.
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func (ic *interopContext) bcGetAccount(v *vm.VM) error {
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accbytes := v.Estack().Pop().Bytes()
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acchash, err := util.Uint160DecodeBytesBE(accbytes)
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if err != nil {
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return err
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}
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acc, err := ic.dao.GetAccountStateOrNew(acchash)
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if err != nil {
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return err
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}
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v.Estack().PushVal(vm.NewInteropItem(acc))
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return nil
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}
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// bcGetAsset returns an asset.
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func (ic *interopContext) bcGetAsset(v *vm.VM) error {
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asbytes := v.Estack().Pop().Bytes()
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ashash, err := util.Uint256DecodeBytesBE(asbytes)
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if err != nil {
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return err
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}
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as, err := ic.dao.GetAssetState(ashash)
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if err != nil {
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return errors.New("asset not found")
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}
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v.Estack().PushVal(vm.NewInteropItem(as))
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return nil
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}
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// accountGetBalance returns balance for a given account.
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func (ic *interopContext) accountGetBalance(v *vm.VM) error {
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accInterface := v.Estack().Pop().Value()
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acc, ok := accInterface.(*state.Account)
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if !ok {
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return fmt.Errorf("%T is not an account state", acc)
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}
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asbytes := v.Estack().Pop().Bytes()
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ashash, err := util.Uint256DecodeBytesBE(asbytes)
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if err != nil {
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return err
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}
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balance, ok := acc.GetBalanceValues()[ashash]
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if !ok {
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balance = util.Fixed8(0)
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}
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v.Estack().PushVal(int64(balance))
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return nil
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}
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// accountGetScriptHash returns script hash of a given account.
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func (ic *interopContext) accountGetScriptHash(v *vm.VM) error {
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accInterface := v.Estack().Pop().Value()
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acc, ok := accInterface.(*state.Account)
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if !ok {
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return fmt.Errorf("%T is not an account state", acc)
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}
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v.Estack().PushVal(acc.ScriptHash.BytesBE())
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return nil
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}
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// accountGetVotes returns votes of a given account.
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func (ic *interopContext) accountGetVotes(v *vm.VM) error {
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accInterface := v.Estack().Pop().Value()
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acc, ok := accInterface.(*state.Account)
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if !ok {
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return fmt.Errorf("%T is not an account state", acc)
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}
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if len(acc.Votes) > vm.MaxArraySize {
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return errors.New("too many votes")
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}
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votes := make([]vm.StackItem, 0, len(acc.Votes))
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for _, key := range acc.Votes {
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votes = append(votes, vm.NewByteArrayItem(key.Bytes()))
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}
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v.Estack().PushVal(votes)
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return nil
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}
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// accountIsStandard checks whether given account is standard.
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func (ic *interopContext) accountIsStandard(v *vm.VM) error {
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accbytes := v.Estack().Pop().Bytes()
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acchash, err := util.Uint160DecodeBytesBE(accbytes)
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if err != nil {
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return err
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}
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contract, err := ic.dao.GetContractState(acchash)
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res := err != nil || vm.IsStandardContract(contract.Script)
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v.Estack().PushVal(res)
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return nil
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}
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/*
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// storageFind finds stored key-value pair.
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func (ic *interopContext) storageFind(v *vm.VM) error {
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stcInterface := v.Estack().Pop().Value()
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stc, ok := stcInterface.(*StorageContext)
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if !ok {
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return fmt.Errorf("%T is not a StorageContext", stcInterface)
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}
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err := ic.checkStorageContext(stc)
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if err != nil {
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return err
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}
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prefix := string(v.Estack().Pop().Bytes())
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siMap, err := ic.dao.GetStorageItems(stc.ScriptHash)
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if err != nil {
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return err
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}
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for k, v := range siMap {
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if strings.HasPrefix(k, prefix) {
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_ = v
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panic("TODO")
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}
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}
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return nil
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}
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*/
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// createContractStateFromVM pops all contract state elements from the VM
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// evaluation stack, does a lot of checks and returns Contract if it
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// succeeds.
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func (ic *interopContext) createContractStateFromVM(v *vm.VM) (*state.Contract, error) {
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if ic.trigger != trigger.Application {
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return nil, errors.New("can't create contract when not triggered by an application")
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}
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script := v.Estack().Pop().Bytes()
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if len(script) > MaxContractScriptSize {
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return nil, errors.New("the script is too big")
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}
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paramBytes := v.Estack().Pop().Bytes()
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if len(paramBytes) > MaxContractParametersNum {
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return nil, errors.New("too many parameters for a script")
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}
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paramList := make([]smartcontract.ParamType, len(paramBytes))
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for k, v := range paramBytes {
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paramList[k] = smartcontract.ParamType(v)
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}
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retType := smartcontract.ParamType(v.Estack().Pop().BigInt().Int64())
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properties := smartcontract.PropertyState(v.Estack().Pop().BigInt().Int64())
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name := v.Estack().Pop().Bytes()
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if len(name) > MaxContractStringLen {
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return nil, errors.New("too big name")
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}
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version := v.Estack().Pop().Bytes()
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if len(version) > MaxContractStringLen {
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return nil, errors.New("too big version")
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}
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author := v.Estack().Pop().Bytes()
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if len(author) > MaxContractStringLen {
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return nil, errors.New("too big author")
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}
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email := v.Estack().Pop().Bytes()
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if len(email) > MaxContractStringLen {
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return nil, errors.New("too big email")
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}
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desc := v.Estack().Pop().Bytes()
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if len(desc) > MaxContractStringLen {
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return nil, errors.New("too big description")
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}
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contract := &state.Contract{
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Script: script,
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ParamList: paramList,
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ReturnType: retType,
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Properties: properties,
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Name: string(name),
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CodeVersion: string(version),
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Author: string(author),
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Email: string(email),
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Description: string(desc),
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}
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return contract, nil
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}
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// contractCreate creates a contract.
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func (ic *interopContext) contractCreate(v *vm.VM) error {
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newcontract, err := ic.createContractStateFromVM(v)
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if err != nil {
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return nil
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}
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contract, err := ic.dao.GetContractState(newcontract.ScriptHash())
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if err != nil {
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contract = newcontract
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err := ic.dao.PutContractState(contract)
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if err != nil {
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return err
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}
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}
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v.Estack().PushVal(vm.NewInteropItem(contract))
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return nil
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}
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// contractGetScript returns a script associated with a contract.
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func (ic *interopContext) contractGetScript(v *vm.VM) error {
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csInterface := v.Estack().Pop().Value()
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cs, ok := csInterface.(*state.Contract)
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if !ok {
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return fmt.Errorf("%T is not a contract state", cs)
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}
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v.Estack().PushVal(cs.Script)
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return nil
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|
}
|
|
|
|
// contractIsPayable returns whether contract is payable.
|
|
func (ic *interopContext) contractIsPayable(v *vm.VM) error {
|
|
csInterface := v.Estack().Pop().Value()
|
|
cs, ok := csInterface.(*state.Contract)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not a contract state", cs)
|
|
}
|
|
v.Estack().PushVal(cs.IsPayable())
|
|
return nil
|
|
}
|
|
|
|
// contractMigrate migrates a contract.
|
|
func (ic *interopContext) contractMigrate(v *vm.VM) error {
|
|
newcontract, err := ic.createContractStateFromVM(v)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
contract, err := ic.dao.GetContractState(newcontract.ScriptHash())
|
|
if err != nil {
|
|
contract = newcontract
|
|
err := ic.dao.PutContractState(contract)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if contract.HasStorage() {
|
|
hash := getContextScriptHash(v, 0)
|
|
siMap, err := ic.dao.GetStorageItems(hash)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for k, v := range siMap {
|
|
v.IsConst = false
|
|
_ = ic.dao.PutStorageItem(hash, []byte(k), v)
|
|
}
|
|
}
|
|
}
|
|
v.Estack().PushVal(vm.NewInteropItem(contract))
|
|
return ic.contractDestroy(v)
|
|
}
|
|
|
|
// assetCreate creates an asset.
|
|
func (ic *interopContext) assetCreate(v *vm.VM) error {
|
|
if ic.trigger != trigger.Application {
|
|
return errors.New("can't create asset when not triggered by an application")
|
|
}
|
|
atype := transaction.AssetType(v.Estack().Pop().BigInt().Int64())
|
|
switch atype {
|
|
case transaction.Currency, transaction.Share, transaction.Invoice, transaction.Token:
|
|
// ok
|
|
default:
|
|
return fmt.Errorf("wrong asset type: %x", atype)
|
|
}
|
|
name := string(v.Estack().Pop().Bytes())
|
|
if len(name) > MaxAssetNameLen {
|
|
return errors.New("too big name")
|
|
}
|
|
amount := util.Fixed8(v.Estack().Pop().BigInt().Int64())
|
|
if amount == util.Fixed8(0) {
|
|
return errors.New("asset amount can't be zero")
|
|
}
|
|
if amount < -util.Satoshi() {
|
|
return errors.New("asset amount can't be negative (except special -Satoshi value")
|
|
}
|
|
if atype == transaction.Invoice && amount != -util.Satoshi() {
|
|
return errors.New("invoice assets can only have -Satoshi amount")
|
|
}
|
|
precision := byte(v.Estack().Pop().BigInt().Int64())
|
|
if precision > MaxAssetPrecision {
|
|
return fmt.Errorf("can't have asset precision of more than %d", MaxAssetPrecision)
|
|
}
|
|
if atype == transaction.Share && precision != 0 {
|
|
return errors.New("share assets can only have zero precision")
|
|
}
|
|
if amount != -util.Satoshi() && (int64(amount)%int64(math.Pow10(int(MaxAssetPrecision-precision))) != 0) {
|
|
return errors.New("given asset amount has fractional component")
|
|
}
|
|
owner := &keys.PublicKey{}
|
|
err := owner.DecodeBytes(v.Estack().Pop().Bytes())
|
|
if err != nil {
|
|
return gherr.Wrap(err, "failed to get owner key")
|
|
}
|
|
if owner.IsInfinity() {
|
|
return errors.New("can't have infinity as an owner key")
|
|
}
|
|
witnessOk, err := ic.checkKeyedWitness(owner)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !witnessOk {
|
|
return errors.New("witness check didn't succeed")
|
|
}
|
|
admin, err := util.Uint160DecodeBytesBE(v.Estack().Pop().Bytes())
|
|
if err != nil {
|
|
return gherr.Wrap(err, "failed to get admin")
|
|
}
|
|
issuer, err := util.Uint160DecodeBytesBE(v.Estack().Pop().Bytes())
|
|
if err != nil {
|
|
return gherr.Wrap(err, "failed to get issuer")
|
|
}
|
|
asset := &state.Asset{
|
|
ID: ic.tx.Hash(),
|
|
AssetType: atype,
|
|
Name: name,
|
|
Amount: amount,
|
|
Precision: precision,
|
|
Owner: *owner,
|
|
Admin: admin,
|
|
Issuer: issuer,
|
|
Expiration: ic.bc.BlockHeight() + DefaultAssetLifetime,
|
|
}
|
|
err = ic.dao.PutAssetState(asset)
|
|
if err != nil {
|
|
return gherr.Wrap(err, "failed to store asset")
|
|
}
|
|
v.Estack().PushVal(vm.NewInteropItem(asset))
|
|
return nil
|
|
}
|
|
|
|
// assetGetAdmin returns asset admin.
|
|
func (ic *interopContext) assetGetAdmin(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(as.Admin.BytesBE())
|
|
return nil
|
|
}
|
|
|
|
// assetGetAmount returns the overall amount of asset available.
|
|
func (ic *interopContext) assetGetAmount(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(int64(as.Amount))
|
|
return nil
|
|
}
|
|
|
|
// assetGetAssetId returns the id of an asset.
|
|
func (ic *interopContext) assetGetAssetID(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(as.ID.BytesBE())
|
|
return nil
|
|
}
|
|
|
|
// assetGetAssetType returns type of an asset.
|
|
func (ic *interopContext) assetGetAssetType(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(int(as.AssetType))
|
|
return nil
|
|
}
|
|
|
|
// assetGetAvailable returns available (not yet issued) amount of asset.
|
|
func (ic *interopContext) assetGetAvailable(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(int(as.Available))
|
|
return nil
|
|
}
|
|
|
|
// assetGetIssuer returns issuer of an asset.
|
|
func (ic *interopContext) assetGetIssuer(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(as.Issuer.BytesBE())
|
|
return nil
|
|
}
|
|
|
|
// assetGetOwner returns owner of an asset.
|
|
func (ic *interopContext) assetGetOwner(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(as.Owner.Bytes())
|
|
return nil
|
|
}
|
|
|
|
// assetGetPrecision returns precision used to measure this asset.
|
|
func (ic *interopContext) assetGetPrecision(v *vm.VM) error {
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
v.Estack().PushVal(int(as.Precision))
|
|
return nil
|
|
}
|
|
|
|
// assetRenew updates asset expiration date.
|
|
func (ic *interopContext) assetRenew(v *vm.VM) error {
|
|
if ic.trigger != trigger.Application {
|
|
return errors.New("can't create asset when not triggered by an application")
|
|
}
|
|
asInterface := v.Estack().Pop().Value()
|
|
as, ok := asInterface.(*state.Asset)
|
|
if !ok {
|
|
return fmt.Errorf("%T is not an asset state", as)
|
|
}
|
|
years := byte(v.Estack().Pop().BigInt().Int64())
|
|
// Not sure why C# code regets an asset from the Store, but we also do it.
|
|
asset, err := ic.dao.GetAssetState(as.ID)
|
|
if err != nil {
|
|
return errors.New("can't renew non-existent asset")
|
|
}
|
|
if asset.Expiration < ic.bc.BlockHeight()+1 {
|
|
asset.Expiration = ic.bc.BlockHeight() + 1
|
|
}
|
|
expiration := uint64(asset.Expiration) + uint64(years)*BlocksPerYear
|
|
if expiration > math.MaxUint32 {
|
|
expiration = math.MaxUint32
|
|
}
|
|
asset.Expiration = uint32(expiration)
|
|
err = ic.dao.PutAssetState(asset)
|
|
if err != nil {
|
|
return gherr.Wrap(err, "failed to store asset")
|
|
}
|
|
v.Estack().PushVal(expiration)
|
|
return nil
|
|
}
|
|
|
|
// runtimeSerialize serializes top stack item into a ByteArray.
|
|
func (ic *interopContext) runtimeSerialize(v *vm.VM) error {
|
|
return vm.RuntimeSerialize(v)
|
|
}
|
|
|
|
// runtimeDeserialize deserializes ByteArray from a stack into an item.
|
|
func (ic *interopContext) runtimeDeserialize(v *vm.VM) error {
|
|
return vm.RuntimeDeserialize(v)
|
|
}
|