141 lines
3.4 KiB
Go
141 lines
3.4 KiB
Go
package tx
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import (
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"encoding/hex"
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"fmt"
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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/spf13/cobra"
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ctypes "github.com/tendermint/tendermint/rpc/core/types"
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"github.com/spf13/viper"
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"github.com/cosmos/cosmos-sdk/client"
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"github.com/cosmos/cosmos-sdk/client/context"
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"github.com/cosmos/cosmos-sdk/codec"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/types/rest"
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"github.com/cosmos/cosmos-sdk/x/auth"
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)
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// QueryTxCmd implements the default command for a tx query.
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func QueryTxCmd(cdc *codec.Codec) *cobra.Command {
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cmd := &cobra.Command{
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Use: "tx [hash]",
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Short: "Matches this txhash over all committed blocks",
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Args: cobra.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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cliCtx := context.NewCLIContext().WithCodec(cdc)
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output, err := queryTx(cdc, cliCtx, args[0])
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if err != nil {
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return err
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}
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if output.Empty() {
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return fmt.Errorf("No transaction found with hash %s", args[0])
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}
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return cliCtx.PrintOutput(output)
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},
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}
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cmd.Flags().StringP(client.FlagNode, "n", "tcp://localhost:26657", "Node to connect to")
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viper.BindPFlag(client.FlagNode, cmd.Flags().Lookup(client.FlagNode))
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cmd.Flags().Bool(client.FlagTrustNode, false, "Trust connected full node (don't verify proofs for responses)")
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viper.BindPFlag(client.FlagTrustNode, cmd.Flags().Lookup(client.FlagTrustNode))
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return cmd
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}
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func queryTx(cdc *codec.Codec, cliCtx context.CLIContext, hashHexStr string) (out sdk.TxResponse, err error) {
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hash, err := hex.DecodeString(hashHexStr)
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if err != nil {
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return out, err
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}
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node, err := cliCtx.GetNode()
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if err != nil {
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return out, err
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}
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res, err := node.Tx(hash, !cliCtx.TrustNode)
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if err != nil {
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return out, err
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}
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if !cliCtx.TrustNode {
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if err = ValidateTxResult(cliCtx, res); err != nil {
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return out, err
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}
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}
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if out, err = formatTxResult(cdc, res); err != nil {
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return out, err
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}
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return out, nil
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}
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// ValidateTxResult performs transaction verification
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func ValidateTxResult(cliCtx context.CLIContext, res *ctypes.ResultTx) error {
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if !cliCtx.TrustNode {
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check, err := cliCtx.Verify(res.Height)
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if err != nil {
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return err
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}
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err = res.Proof.Validate(check.Header.DataHash)
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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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return nil
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}
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func formatTxResult(cdc *codec.Codec, res *ctypes.ResultTx) (sdk.TxResponse, error) {
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tx, err := parseTx(cdc, res.Tx)
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if err != nil {
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return sdk.TxResponse{}, err
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}
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return sdk.NewResponseResultTx(res, tx), nil
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}
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func parseTx(cdc *codec.Codec, txBytes []byte) (sdk.Tx, error) {
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var tx auth.StdTx
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err := cdc.UnmarshalBinaryLengthPrefixed(txBytes, &tx)
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if err != nil {
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return nil, err
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}
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return tx, nil
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}
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// REST
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// QueryTxRequestHandlerFn transaction query REST handler
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func QueryTxRequestHandlerFn(cdc *codec.Codec, cliCtx context.CLIContext) 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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output, err := queryTx(cdc, cliCtx, hashHexStr)
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if err != nil {
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if strings.Contains(err.Error(), hashHexStr) {
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rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
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return
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}
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rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
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return
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}
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if output.Empty() {
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rest.WriteErrorResponse(w, http.StatusNotFound, fmt.Sprintf("no transaction found with hash %s", hashHexStr))
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}
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rest.PostProcessResponse(w, cdc, output, cliCtx.Indent)
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}
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}
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