github.com/cuiweixie/go-ethereum@v1.8.2-0.20180303084001-66cd41af1e38/trie/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 trie
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"github.com/ethereum/go-ethereum/common"
    23  )
    24  
    25  // MissingNodeError is returned by the trie functions (TryGet, TryUpdate, TryDelete)
    26  // in the case where a trie node is not present in the local database. It contains
    27  // information necessary for retrieving the missing node.
    28  type MissingNodeError struct {
    29  	NodeHash common.Hash // hash of the missing node
    30  	Path     []byte      // hex-encoded path to the missing node
    31  }
    32  
    33  func (err *MissingNodeError) Error() string {
    34  	return fmt.Sprintf("missing trie node %x (path %x)", err.NodeHash, err.Path)
    35  }