0g-chain/internal/lcd/decode.go

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package lcd
import (
"encoding/base64"
"encoding/json"
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"net/http"
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"github.com/cosmos/cosmos-sdk/client/context"
"github.com/cosmos/cosmos-sdk/wire"
"github.com/cosmos/cosmos-sdk/x/auth"
)
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type txBody struct {
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TxBase64 string `json:"txbase64"`
}
// Decode a tx from base64 into json
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func DecodeTxRequestHandlerFn(cliCtx context.CLIContext, cdc *wire.Codec) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
// get the input base64 string
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var m txBody
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decoder := json.NewDecoder(r.Body)
err := decoder.Decode(&m)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
return
}
// convert from base64 string to bytes
txBytes, err := base64.StdEncoding.DecodeString(m.TxBase64)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
return
}
// convert bytes to Tx struct
var tx auth.StdTx
err = cdc.UnmarshalBinary(txBytes, &tx)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
return
}
// convert Tx struct to json (bytes) and return
output, err := cdc.MarshalJSON(tx)
if err != nil {
w.WriteHeader(500)
w.Write([]byte(err.Error()))
return
}
w.Write(output)
}
}