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Merge pull request #81 from ethereumproject/apply-upstream/73
Apply upstream/73
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| // Copyright 2016 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package state | ||
|
|
||
| import ( | ||
| "math/big" | ||
|
|
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| "github.com/ethereumproject/go-ethereum/common" | ||
| ) | ||
|
|
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| type journalEntry interface { | ||
| undo(*StateDB) | ||
| } | ||
|
|
||
| type journal []journalEntry | ||
|
|
||
| type ( | ||
| // Changes to the account trie. | ||
| createObjectChange struct { | ||
| account *common.Address | ||
| } | ||
| resetObjectChange struct { | ||
| prev *StateObject | ||
| } | ||
| suicideChange struct { | ||
| account *common.Address | ||
| prev bool // whether account had already suicided | ||
| prevbalance *big.Int | ||
| } | ||
|
|
||
| // Changes to individual accounts. | ||
| balanceChange struct { | ||
| account *common.Address | ||
| prev *big.Int | ||
| } | ||
| nonceChange struct { | ||
| account *common.Address | ||
| prev uint64 | ||
| } | ||
| storageChange struct { | ||
| account *common.Address | ||
| key, prevalue common.Hash | ||
| } | ||
| codeChange struct { | ||
| account *common.Address | ||
| prevcode, prevhash []byte | ||
| } | ||
|
|
||
| // Changes to other state values. | ||
| refundChange struct { | ||
| prev *big.Int | ||
| } | ||
| addLogChange struct { | ||
| txhash common.Hash | ||
| } | ||
| ) | ||
|
|
||
| func (ch createObjectChange) undo(s *StateDB) { | ||
| s.GetStateObject(*ch.account).deleted = true | ||
| delete(s.stateObjects, *ch.account) | ||
| delete(s.stateObjectsDirty, *ch.account) | ||
| } | ||
|
|
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| func (ch resetObjectChange) undo(s *StateDB) { | ||
| s.setStateObject(ch.prev) | ||
| } | ||
|
|
||
| func (ch suicideChange) undo(s *StateDB) { | ||
| obj := s.GetStateObject(*ch.account) | ||
| if obj != nil { | ||
| obj.suicided = ch.prev | ||
| obj.setBalance(ch.prevbalance) | ||
| } | ||
| } | ||
|
|
||
| func (ch balanceChange) undo(s *StateDB) { | ||
| s.GetStateObject(*ch.account).setBalance(ch.prev) | ||
| } | ||
|
|
||
| func (ch nonceChange) undo(s *StateDB) { | ||
| s.GetStateObject(*ch.account).setNonce(ch.prev) | ||
| } | ||
|
|
||
| func (ch codeChange) undo(s *StateDB) { | ||
| s.GetStateObject(*ch.account).setCode(common.BytesToHash(ch.prevhash), ch.prevcode) | ||
| } | ||
|
|
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| func (ch storageChange) undo(s *StateDB) { | ||
| s.GetStateObject(*ch.account).setState(ch.key, ch.prevalue) | ||
| } | ||
|
|
||
| func (ch refundChange) undo(s *StateDB) { | ||
| s.refund = ch.prev | ||
| } | ||
|
|
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| func (ch addLogChange) undo(s *StateDB) { | ||
| logs := s.logs[ch.txhash] | ||
| if len(logs) == 1 { | ||
| delete(s.logs, ch.txhash) | ||
| } else { | ||
| s.logs[ch.txhash] = logs[:len(logs)-1] | ||
| } | ||
| } |
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