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feat: add dummy VE handler to simapp (#16595)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package simapp | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/rand" | ||
| "encoding/json" | ||
| "fmt" | ||
|
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| abci "github.com/cometbft/cometbft/abci/types" | ||
|
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| "github.com/cosmos/cosmos-sdk/baseapp" | ||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| ) | ||
|
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| type ( | ||
| // VoteExtensionHandler defines a dummy vote extension handler for SimApp. | ||
| // | ||
| // NOTE: This implementation is solely used for testing purposes. DO NOT use | ||
| // in a production application! | ||
| VoteExtensionHandler struct{} | ||
|
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| // VoteExtension defines the structure used to create a dummy vote extension. | ||
| VoteExtension struct { | ||
| Hash []byte | ||
| Height int64 | ||
| Data []byte | ||
| } | ||
| ) | ||
|
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| func NewVoteExtensionHandler() *VoteExtensionHandler { | ||
| return &VoteExtensionHandler{} | ||
| } | ||
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| func (h *VoteExtensionHandler) SetHandlers(bApp *baseapp.BaseApp) { | ||
| bApp.SetExtendVoteHandler(h.ExtendVote()) | ||
| bApp.SetVerifyVoteExtensionHandler(h.VerifyVoteExtension()) | ||
| } | ||
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| func (h *VoteExtensionHandler) ExtendVote() sdk.ExtendVoteHandler { | ||
| return func(_ sdk.Context, req *abci.RequestExtendVote) (*abci.ResponseExtendVote, error) { | ||
| buf := make([]byte, 1024) | ||
|
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| _, err := rand.Read(buf) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to generate random vote extension data: %w", err) | ||
| } | ||
|
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| ve := VoteExtension{ | ||
| Hash: req.Hash, | ||
| Height: req.Height, | ||
| Data: buf, | ||
| } | ||
|
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| bz, err := json.Marshal(ve) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to encode vote extension: %w", err) | ||
| } | ||
|
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| return &abci.ResponseExtendVote{VoteExtension: bz}, nil | ||
| } | ||
| } | ||
|
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| func (h *VoteExtensionHandler) VerifyVoteExtension() sdk.VerifyVoteExtensionHandler { | ||
| return func(ctx sdk.Context, req *abci.RequestVerifyVoteExtension) (*abci.ResponseVerifyVoteExtension, error) { | ||
| var ve VoteExtension | ||
|
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| if err := json.Unmarshal(req.VoteExtension, &ve); err != nil { | ||
| return &abci.ResponseVerifyVoteExtension{Status: abci.ResponseVerifyVoteExtension_REJECT}, nil | ||
| } | ||
|
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| switch { | ||
| case req.Height != ve.Height: | ||
| return &abci.ResponseVerifyVoteExtension{Status: abci.ResponseVerifyVoteExtension_REJECT}, nil | ||
|
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| case !bytes.Equal(req.Hash, ve.Hash): | ||
| return &abci.ResponseVerifyVoteExtension{Status: abci.ResponseVerifyVoteExtension_REJECT}, nil | ||
|
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| case len(ve.Data) != 1024: | ||
| return &abci.ResponseVerifyVoteExtension{Status: abci.ResponseVerifyVoteExtension_REJECT}, nil | ||
| } | ||
|
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| return &abci.ResponseVerifyVoteExtension{Status: abci.ResponseVerifyVoteExtension_ACCEPT}, nil | ||
| } | ||
| } |
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