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/*
  This file is part of go-ethereum

  go-ethereum is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  go-ethereum 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
package rpc

import (
    "encoding/json"
    "fmt"
)

type InsufficientParamsError struct {
    have int
    want int
}

func (e *InsufficientParamsError) Error() string {
    return fmt.Sprintf("insufficient params, want %d have %d", e.want, e.have)
}

func NewInsufficientParamsError(have int, want int) *InsufficientParamsError {
    return &InsufficientParamsError{
        have: have,
        want: want,
    }
}

type NotImplementedError struct {
    Method string
}

func (e *NotImplementedError) Error() string {
    return fmt.Sprintf("%s method not implemented", e.Method)
}

func NewNotImplementedError(method string) *NotImplementedError {
    return &NotImplementedError{
        Method: method,
    }
}

type DecodeParamError struct {
    err string
}

func (e *DecodeParamError) Error() string {
    return fmt.Sprintf("could not decode, %s", e.err)

}

func NewDecodeParamError(errstr string) error {
    return &DecodeParamError{
        err: errstr,
    }
}

type ValidationError struct {
    ParamName string
    msg       string
}

func (e *ValidationError) Error() string {
    return fmt.Sprintf("%s not valid, %s", e.ParamName, e.msg)
}

func NewValidationError(param string, msg string) error {
    return &ValidationError{
        ParamName: param,
        msg:       msg,
    }
}

type RpcRequest struct {
    ID      interface{}     `json:"id"`
    JsonRpc string          `json:"jsonrpc"`
    Method  string          `json:"method"`
    Params  json.RawMessage `json:"params"`
}

type RpcSuccessResponse struct {
    ID      interface{} `json:"id"`
    JsonRpc string      `json:"jsonrpc"`
    Result  interface{} `json:"result"`
}

type RpcErrorResponse struct {
    ID      interface{}     `json:"id"`
    JsonRpc string          `json:"jsonrpc"`
    Error   *RpcErrorObject `json:"error"`
}

type RpcErrorObject struct {
    Code    int    `json:"code"`
    Message string `json:"message"`
    // Data    interface{} `json:"data"`
}