gitee.com/liu-zhao234568/cntest@v1.0.0/rpc/errors.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package rpc
    18  
    19  import "fmt"
    20  
    21  // HTTPError is returned by client operations when the HTTP status code of the
    22  // response is not a 2xx status.
    23  type HTTPError struct {
    24  	StatusCode int
    25  	Status     string
    26  	Body       []byte
    27  }
    28  
    29  func (err HTTPError) Error() string {
    30  	if len(err.Body) == 0 {
    31  		return err.Status
    32  	}
    33  	return fmt.Sprintf("%v: %s", err.Status, err.Body)
    34  }
    35  
    36  // Error wraps RPC errors, which contain an error code in addition to the message.
    37  type Error interface {
    38  	Error() string  // returns the message
    39  	ErrorCode() int // returns the code
    40  }
    41  
    42  // A DataError contains some data in addition to the error message.
    43  type DataError interface {
    44  	Error() string          // returns the message
    45  	ErrorData() interface{} // returns the error data
    46  }
    47  
    48  // Error types defined below are the built-in JSON-RPC errors.
    49  
    50  var (
    51  	_ Error = new(methodNotFoundError)
    52  	_ Error = new(subscriptionNotFoundError)
    53  	_ Error = new(parseError)
    54  	_ Error = new(invalidRequestError)
    55  	_ Error = new(invalidMessageError)
    56  	_ Error = new(invalidParamsError)
    57  )
    58  
    59  const defaultErrorCode = -32000
    60  
    61  type methodNotFoundError struct{ method string }
    62  
    63  func (e *methodNotFoundError) ErrorCode() int { return -32601 }
    64  
    65  func (e *methodNotFoundError) Error() string {
    66  	return fmt.Sprintf("the method %s does not exist/is not available", e.method)
    67  }
    68  
    69  type subscriptionNotFoundError struct{ namespace, subscription string }
    70  
    71  func (e *subscriptionNotFoundError) ErrorCode() int { return -32601 }
    72  
    73  func (e *subscriptionNotFoundError) Error() string {
    74  	return fmt.Sprintf("no %q subscription in %s namespace", e.subscription, e.namespace)
    75  }
    76  
    77  // Invalid JSON was received by the server.
    78  type parseError struct{ message string }
    79  
    80  func (e *parseError) ErrorCode() int { return -32700 }
    81  
    82  func (e *parseError) Error() string { return e.message }
    83  
    84  // received message isn't a valid request
    85  type invalidRequestError struct{ message string }
    86  
    87  func (e *invalidRequestError) ErrorCode() int { return -32600 }
    88  
    89  func (e *invalidRequestError) Error() string { return e.message }
    90  
    91  // received message is invalid
    92  type invalidMessageError struct{ message string }
    93  
    94  func (e *invalidMessageError) ErrorCode() int { return -32700 }
    95  
    96  func (e *invalidMessageError) Error() string { return e.message }
    97  
    98  // unable to decode supplied params, or an invalid number of parameters
    99  type invalidParamsError struct{ message string }
   100  
   101  func (e *invalidParamsError) ErrorCode() int { return -32602 }
   102  
   103  func (e *invalidParamsError) Error() string { return e.message }