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52904ae32f
Created alternate versions of Trie and SecureTrie functions that can return a MissingNodeError (used by ODR services)
42 lines
1.6 KiB
Go
42 lines
1.6 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package trie
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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)
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// MissingNodeError is returned by the trie functions (TryGet, TryUpdate, TryDelete)
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// in the case where a trie node is not present in the local database. Contains
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// information necessary for retrieving the missing node through an ODR service.
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//
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// NodeHash is the hash of the missing node
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// RootHash is the original root of the trie that contains the node
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// KeyPrefix is the prefix that leads from the root to the missing node (hex encoded)
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// KeySuffix (optional) contains the rest of the key we were looking for, gives a
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// hint on which further nodes should also be retrieved (hex encoded)
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type MissingNodeError struct {
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RootHash, NodeHash common.Hash
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KeyPrefix, KeySuffix []byte
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}
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func (err *MissingNodeError) Error() string {
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return fmt.Sprintf("Missing trie node %064x", err.NodeHash)
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}
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