github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/p2p/dnsdisc/error.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package dnsdisc
    19  
    20  import (
    21  	"errors"
    22  	"fmt"
    23  )
    24  
    25  // Entry parse errors.
    26  var (
    27  	errUnknownEntry = errors.New("unknown entry type")
    28  	errNoPubkey     = errors.New("missing public key")
    29  	errBadPubkey    = errors.New("invalid public key")
    30  	errInvalidENR   = errors.New("invalid node record")
    31  	errInvalidChild = errors.New("invalid child hash")
    32  	errInvalidSig   = errors.New("invalid base64 signature")
    33  	errSyntax       = errors.New("invalid syntax")
    34  )
    35  
    36  // Resolver/sync errors
    37  var (
    38  	errNoRoot        = errors.New("no valid root found")
    39  	errNoEntry       = errors.New("no valid tree entry found")
    40  	errHashMismatch  = errors.New("hash mismatch")
    41  	errENRInLinkTree = errors.New("enr entry in link tree")
    42  	errLinkInENRTree = errors.New("link entry in ENR tree")
    43  )
    44  
    45  type nameError struct {
    46  	name string
    47  	err  error
    48  }
    49  
    50  func (err nameError) Error() string {
    51  	if ee, ok := err.err.(entryError); ok {
    52  		return fmt.Sprintf("invalid %s entry at %s: %v", ee.typ, err.name, ee.err)
    53  	}
    54  	return err.name + ": " + err.err.Error()
    55  }
    56  
    57  type entryError struct {
    58  	typ string
    59  	err error
    60  }
    61  
    62  func (err entryError) Error() string {
    63  	return fmt.Sprintf("invalid %s entry: %v", err.typ, err.err)
    64  }