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Add API for compatible query of two types of transactions (#683)
* Add API for compatible query of two types of transactions * format code * optimize code * optimize code * format code * optimize code * add error handling Co-authored-by: Federico Kunze <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package rest | ||
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| import ( | ||
| "encoding/hex" | ||
| "encoding/json" | ||
| "net/http" | ||
| "strings" | ||
|
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||
| "github.com/cosmos/cosmos-sdk/client/context" | ||
| "github.com/cosmos/cosmos-sdk/types/rest" | ||
| authrest "github.com/cosmos/cosmos-sdk/x/auth/client/rest" | ||
| "github.com/cosmos/cosmos-sdk/x/auth/client/utils" | ||
| rpctypes "github.com/cosmos/ethermint/rpc/types" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/gorilla/mux" | ||
| ) | ||
|
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| // RegisterRoutes - Central function to define routes that get registered by the main application | ||
| func RegisterRoutes(cliCtx context.CLIContext, r *mux.Router) { | ||
| r.HandleFunc("/txs/{hash}", QueryTxRequestHandlerFn(cliCtx)).Methods("GET") | ||
| r.HandleFunc("/txs", authrest.QueryTxsRequestHandlerFn(cliCtx)).Methods("GET") // default from auth | ||
| r.HandleFunc("/txs", authrest.BroadcastTxRequest(cliCtx)).Methods("POST") // default from auth | ||
| r.HandleFunc("/txs/encode", authrest.EncodeTxRequestHandlerFn(cliCtx)).Methods("POST") // default from auth | ||
| r.HandleFunc("/txs/decode", authrest.DecodeTxRequestHandlerFn(cliCtx)).Methods("POST") // default from auth | ||
| } | ||
|
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| func QueryTxRequestHandlerFn(cliCtx context.CLIContext) http.HandlerFunc { | ||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| vars := mux.Vars(r) | ||
| hashHexStr := vars["hash"] | ||
|
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| cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r) | ||
| if !ok { | ||
| return | ||
| } | ||
|
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| ethHashPrefix := "0x" | ||
| if strings.HasPrefix(hashHexStr, ethHashPrefix) { | ||
| // eth Tx | ||
| ethHashPrefixLength := len(ethHashPrefix) | ||
| output, err := getEthTransactionByHash(cliCtx, hashHexStr[ethHashPrefixLength:]) | ||
| if err != nil { | ||
| rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error()) | ||
| return | ||
| } | ||
| rest.PostProcessResponseBare(w, cliCtx, output) | ||
| return | ||
| } | ||
|
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| output, err := utils.QueryTx(cliCtx, hashHexStr) | ||
| if err != nil { | ||
| if strings.Contains(err.Error(), hashHexStr) { | ||
| rest.WriteErrorResponse(w, http.StatusNotFound, err.Error()) | ||
| return | ||
| } | ||
| rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error()) | ||
| return | ||
| } | ||
| rest.PostProcessResponseBare(w, cliCtx, output) | ||
| } | ||
|
|
||
| } | ||
|
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| // GetTransactionByHash returns the transaction identified by hash. | ||
| func getEthTransactionByHash(cliCtx context.CLIContext, hashHex string) ([]byte, error) { | ||
| hash, err := hex.DecodeString(hashHex) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| node, err := cliCtx.GetNode() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| tx, err := node.Tx(hash, false) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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||
| // Can either cache or just leave this out if not necessary | ||
| block, err := node.Block(&tx.Height) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| blockHash := common.BytesToHash(block.Block.Header.Hash()) | ||
|
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| ethTx, err := rpctypes.RawTxToEthTx(cliCtx, tx.Tx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| height := uint64(tx.Height) | ||
| res, err := rpctypes.NewTransaction(ethTx, common.BytesToHash(tx.Tx.Hash()), blockHash, height, uint64(tx.Index)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return json.Marshal(res) | ||
| } |