90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
// Copyright 2015 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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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/trie/trienode"
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"github.com/ethereum/go-ethereum/common"
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)
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type EmptyTrie struct{}
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// NewSecure creates a dummy trie
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func NewEmptyTrie() *EmptyTrie {
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return &EmptyTrie{}
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}
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func (t *EmptyTrie) GetKey(shaKey []byte) []byte {
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return nil
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}
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func (t *EmptyTrie) GetStorage(_ common.Address, key []byte) ([]byte, error) {
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return nil, nil
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}
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func (t *EmptyTrie) GetAccount(address common.Address) (*types.StateAccount, error) {
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return nil, nil
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}
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func (t *EmptyTrie) UpdateStorage(_ common.Address, key, value []byte) error {
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return nil
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}
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// TryUpdateAccount abstract an account write in the trie.
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func (t *EmptyTrie) UpdateAccount(address common.Address, account *types.StateAccount) error {
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return nil
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}
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func (t *EmptyTrie) UpdateContractCode(_ common.Address, _ common.Hash, _ []byte) error {
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return nil
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}
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func (t *EmptyTrie) DeleteStorage(_ common.Address, key []byte) error {
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return nil
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}
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func (t *EmptyTrie) DeleteAccount(address common.Address) error {
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return nil
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}
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func (t *EmptyTrie) Commit(collectLeaf bool) (common.Hash, *trienode.NodeSet, error) {
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return common.Hash{}, nil, nil
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}
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func (t *EmptyTrie) Hash() common.Hash {
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return common.Hash{}
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}
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// NodeIterator returns an iterator that returns nodes of the underlying trie. Iteration
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// starts at the key after the given start key.
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func (t *EmptyTrie) NodeIterator(startKey []byte) (NodeIterator, error) {
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return nil, nil
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}
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func (t *EmptyTrie) Prove(key []byte, proofDb ethdb.KeyValueWriter) error {
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return nil
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}
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// Copy returns a copy of SecureTrie.
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func (t *EmptyTrie) Copy() *EmptyTrie {
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cpy := *t
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return &cpy
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}
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