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Merge pull request #397 from iotaledger/feat/inx-tx-validation-new
Added a new inx method to validate if a transaction can be executed by the VM successfully
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package inx | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/iotaledger/hive.go/ierrors" | ||
| "github.com/iotaledger/hive.go/lo" | ||
| "github.com/iotaledger/hive.go/serializer/v2/serix" | ||
| inx "github.com/iotaledger/inx/go" | ||
| "github.com/iotaledger/iota-core/pkg/protocol/engine/mempool" | ||
| iotago "github.com/iotaledger/iota.go/v4" | ||
| ) | ||
|
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| func (s *Server) RequestTips(_ context.Context, req *inx.TipsRequest) (*inx.TipsResponse, error) { | ||
| references := deps.Protocol.MainEngineInstance().TipSelection.SelectTips(int(req.GetCount())) | ||
|
|
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| return &inx.TipsResponse{ | ||
| StrongTips: inx.NewBlockIds(references[iotago.StrongParentType]), | ||
| WeakTips: inx.NewBlockIds(references[iotago.WeakParentType]), | ||
| ShallowLikeTips: inx.NewBlockIds(references[iotago.ShallowLikeParentType]), | ||
| }, nil | ||
| } | ||
|
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| func (s *Server) ValidatePayload(_ context.Context, payload *inx.RawPayload) (*inx.PayloadValidationResponse, error) { | ||
| if err := func() error { | ||
| blockPayload, unwrapErr := payload.Unwrap(deps.Protocol.CurrentAPI(), serix.WithValidation()) | ||
| if unwrapErr != nil { | ||
| return unwrapErr | ||
| } | ||
|
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| switch typedPayload := blockPayload.(type) { | ||
| case *iotago.SignedTransaction: | ||
| memPool := deps.Protocol.MainEngineInstance().Ledger.MemPool() | ||
|
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| inputReferences, inputsErr := memPool.VM().Inputs(typedPayload.Transaction) | ||
| if inputsErr != nil { | ||
| return inputsErr | ||
| } | ||
|
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| loadedInputs := make([]mempool.State, 0) | ||
| for _, inputReference := range inputReferences { | ||
| metadata, metadataErr := memPool.StateMetadata(inputReference) | ||
| if metadataErr != nil { | ||
| return metadataErr | ||
| } | ||
|
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| loadedInputs = append(loadedInputs, metadata.State()) | ||
| } | ||
|
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| executionContext, validationErr := memPool.VM().ValidateSignatures(typedPayload, loadedInputs) | ||
| if validationErr != nil { | ||
| return validationErr | ||
| } | ||
|
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| return lo.Return2(memPool.VM().Execute(executionContext, typedPayload.Transaction)) | ||
|
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| case *iotago.TaggedData: | ||
| // TaggedData is always valid if serix decoding was successful | ||
| return nil | ||
|
|
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| default: | ||
| return ierrors.Errorf("unsupported payload type: %T", typedPayload) | ||
| } | ||
| }(); err != nil { | ||
| //nolint:nilerr // this is expected behavior | ||
| return &inx.PayloadValidationResponse{IsValid: false, Error: err.Error()}, nil | ||
| } | ||
|
|
||
| return &inx.PayloadValidationResponse{IsValid: true}, nil | ||
| } |
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