forked from cerc-io/laconicd-deprecated
117 lines
3.1 KiB
Go
117 lines
3.1 KiB
Go
package rest
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import (
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"context"
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"encoding/hex"
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"encoding/json"
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"errors"
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"math/big"
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"net/http"
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"strings"
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"github.com/gorilla/mux"
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"github.com/cosmos/cosmos-sdk/client"
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clientrest "github.com/cosmos/cosmos-sdk/client/rest"
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"github.com/cosmos/cosmos-sdk/types/rest"
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authrest "github.com/cosmos/cosmos-sdk/x/auth/client/rest"
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rpctypes "github.com/tharsis/ethermint/rpc/types"
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feemarkettypes "github.com/tharsis/ethermint/x/feemarket/types"
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"github.com/ethereum/go-ethereum/common"
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)
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// RegisterTxRoutes - Central function to define routes that get registered by the main application
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func RegisterTxRoutes(clientCtx client.Context, rtr *mux.Router) {
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r := clientrest.WithHTTPDeprecationHeaders(rtr)
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r.HandleFunc("/txs/{hash}", QueryTxRequestHandlerFn(clientCtx)).Methods("GET")
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r.HandleFunc("/txs", authrest.QueryTxsRequestHandlerFn(clientCtx)).Methods("GET")
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r.HandleFunc("/txs/decode", authrest.DecodeTxRequestHandlerFn(clientCtx)).Methods("POST")
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}
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// QueryTxRequestHandlerFn implements a REST handler that queries a transaction
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// by hash in a committed block.
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func QueryTxRequestHandlerFn(clientCtx client.Context) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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hashHexStr := vars["hash"]
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clientCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, clientCtx, r)
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if !ok {
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return
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}
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ethHashPrefix := "0x"
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if !strings.HasPrefix(hashHexStr, ethHashPrefix) {
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authrest.QueryTxRequestHandlerFn(clientCtx)
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return
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}
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// eth Tx
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ethHashPrefixLength := len(ethHashPrefix)
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output, err := getEthTransactionByHash(clientCtx, hashHexStr[ethHashPrefixLength:])
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if err != nil {
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rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
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return
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}
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rest.PostProcessResponseBare(w, clientCtx, output)
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}
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}
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// GetTransactionByHash returns the transaction identified by hash.
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func getEthTransactionByHash(clientCtx client.Context, hashHex string) ([]byte, error) {
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hash, err := hex.DecodeString(hashHex)
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if err != nil {
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return nil, err
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}
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node, err := clientCtx.GetNode()
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if err != nil {
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return nil, err
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}
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tx, err := node.Tx(context.Background(), hash, false)
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if err != nil {
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return nil, err
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}
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// Can either cache or just leave this out if not necessary
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block, err := node.Block(context.Background(), &tx.Height)
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if err != nil {
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return nil, err
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}
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client := feemarkettypes.NewQueryClient(clientCtx)
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res, err := client.BaseFee(context.Background(), &feemarkettypes.QueryBaseFeeRequest{})
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if err != nil {
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return nil, err
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}
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var baseFee *big.Int
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if res.BaseFee != nil {
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baseFee = res.BaseFee.BigInt()
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}
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blockHash := common.BytesToHash(block.Block.Header.Hash())
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ethTxs, err := rpctypes.RawTxToEthTx(clientCtx, tx.Tx)
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if err != nil {
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return nil, err
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}
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height := uint64(tx.Height)
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for _, ethTx := range ethTxs {
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if common.HexToHash(ethTx.Hash) == common.BytesToHash(hash) {
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rpcTx, err := rpctypes.NewRPCTransaction(ethTx.AsTransaction(), blockHash, height, uint64(tx.Index), baseFee)
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if err != nil {
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return nil, err
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}
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return json.Marshal(rpcTx)
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}
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}
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return nil, errors.New("eth tx not found")
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}
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