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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// go-ethereum 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 go-ethereum library 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package shared

import "fmt"

type InvalidTypeError struct {
    method string
    msg    string
}

func (e *InvalidTypeError) Error() string {
    return fmt.Sprintf("invalid type on field %s: %s", e.method, e.msg)
}

func NewInvalidTypeError(method, msg string) *InvalidTypeError {
    return &InvalidTypeError{
        method: method,
        msg:    msg,
    }
}

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 NotAvailableError struct {
    Method string
    Reason string
}

func (e *NotAvailableError) Error() string {
    return fmt.Sprintf("%s method not available: %s", e.Method, e.Reason)
}

func NewNotAvailableError(method string, reason string) *NotAvailableError {
    return &NotAvailableError{
        Method: method,
        Reason: reason,
    }
}