/
rpc.go
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/
rpc.go
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/*
* Copyright (C) 2019 The onyxchain Authors
* This file is part of The onyxchain library.
*
* The onyxchain is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The onyxchain is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The onyxchain. If not, see <http://www.gnu.org/licenses/>.
*/
package utils
import (
"encoding/json"
"fmt"
"github.com/OnyxPay/OnyxChain/common/config"
rpcerr "github.com/OnyxPay/OnyxChain/http/base/error"
"io/ioutil"
"net/http"
"strings"
)
//JsonRpc version
const JSON_RPC_VERSION = "2.0"
const (
ERROR_INVALID_PARAMS = rpcerr.INVALID_PARAMS
ERROR_ONYXCHAIN_COMMON = 10000
ERROR_ONYXCHAIN_SUCCESS = 0
)
type OnyxChainError struct {
ErrorCode int64
Error error
}
func NewOnyxChainError(err error, errCode ...int64) *OnyxChainError {
onxErr := &OnyxChainError{Error: err}
if len(errCode) > 0 {
onxErr.ErrorCode = errCode[0]
} else {
onxErr.ErrorCode = ERROR_ONYXCHAIN_COMMON
}
if err == nil {
onxErr.ErrorCode = ERROR_ONYXCHAIN_SUCCESS
}
return onxErr
}
//JsonRpcRequest object in rpc
type JsonRpcRequest struct {
Version string `json:"jsonrpc"`
Id string `json:"id"`
Method string `json:"method"`
Params []interface{} `json:"params"`
}
//JsonRpcResponse object response for JsonRpcRequest
type JsonRpcResponse struct {
Error int64 `json:"error"`
Desc string `json:"desc"`
Result json.RawMessage `json:"result"`
}
func sendRpcRequest(method string, params []interface{}) ([]byte, *OnyxChainError) {
rpcReq := &JsonRpcRequest{
Version: JSON_RPC_VERSION,
Id: "cli",
Method: method,
Params: params,
}
data, err := json.Marshal(rpcReq)
if err != nil {
return nil, NewOnyxChainError(fmt.Errorf("JsonRpcRequest json.Marshal error:%s", err))
}
addr := fmt.Sprintf("http://localhost:%d", config.DefConfig.Rpc.HttpJsonPort)
resp, err := http.Post(addr, "application/json", strings.NewReader(string(data)))
if err != nil {
return nil, NewOnyxChainError(err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, NewOnyxChainError(fmt.Errorf("read rpc response body error:%s", err))
}
rpcRsp := &JsonRpcResponse{}
err = json.Unmarshal(body, rpcRsp)
if err != nil {
return nil, NewOnyxChainError(fmt.Errorf("json.Unmarshal JsonRpcResponse:%s error:%s", body, err))
}
if rpcRsp.Error != 0 {
return nil, NewOnyxChainError(fmt.Errorf("\n %s ", string(body)), rpcRsp.Error)
}
return rpcRsp.Result, nil
}