github.com/reapchain/go-reapchain@v0.2.15-0.20210609012950-9735c110c705/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. Contains 27 // information necessary for retrieving the missing node through an ODR service. 28 // 29 // NodeHash is the hash of the missing node 30 // 31 // RootHash is the original root of the trie that contains the node 32 // 33 // PrefixLen is the nibble length of the key prefix that leads from the root to 34 // the missing node 35 // 36 // SuffixLen is the nibble length of the remaining part of the key that hints on 37 // which further nodes should also be retrieved (can be zero when there are no 38 // such hints in the error message) 39 type MissingNodeError struct { 40 RootHash, NodeHash common.Hash 41 PrefixLen, SuffixLen int 42 } 43 44 func (err *MissingNodeError) Error() string { 45 return fmt.Sprintf("Missing trie node %064x", err.NodeHash) 46 }