forked from fractal-platform/fractal
-
Notifications
You must be signed in to change notification settings - Fork 0
/
journal.go
232 lines (193 loc) · 5.33 KB
/
journal.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
package state
import (
"math/big"
"github.com/fractal-platform/fractal/common"
"github.com/fractal-platform/fractal/core/nonces"
)
// journalEntry is a modification entry in the state change journal that can be
// reverted on demand.
type journalEntry interface {
// revert undoes the changes introduced by this journal entry.
revert(*StateDB)
// dirtied returns the Ethereum address modified by this journal entry.
dirtied() *common.Address
}
// journal contains the list of state modifications applied since a complete transaction/package ends
// and the FinaliseOne method is called. These are tracked to be able to be reverted in case of an
// execution exception or revertal request.
type journal struct {
entries []journalEntry // Current changes tracked by the journal
dirties map[common.Address]int // Dirty accounts and the number of changes
}
// newJournal create a new initialized journal.
func newJournal() *journal {
return &journal{
dirties: make(map[common.Address]int),
}
}
// append inserts a new modification entry to the end of the change journal.
func (j *journal) append(entry journalEntry) {
j.entries = append(j.entries, entry)
if addr := entry.dirtied(); addr != nil {
j.dirties[*addr]++
}
}
// revert undoes a batch of journalled modifications along with any reverted
// dirty handling too.
func (j *journal) revert(statedb *StateDB, snapshot int) {
for i := len(j.entries) - 1; i >= snapshot; i-- {
// Undo the changes made by the operation
j.entries[i].revert(statedb)
// Drop any dirty tracking induced by the change
if addr := j.entries[i].dirtied(); addr != nil {
if j.dirties[*addr]--; j.dirties[*addr] == 0 {
delete(j.dirties, *addr)
}
}
}
j.entries = j.entries[:snapshot]
}
// dirty explicitly sets an address to dirty, even if the change entries would
// otherwise suggest it as clean. This method is an ugly hack to handle the RIPEMD
// precompile consensus exception.
func (j *journal) dirty(addr common.Address) {
j.dirties[addr]++
}
// length returns the current number of entries in the journal.
func (j *journal) length() int {
return len(j.entries)
}
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
}
nonceSetChange struct {
account *common.Address
prev *nonces.NonceSet
}
packageNonceSetChange struct {
account *common.Address
}
storageChange struct {
account *common.Address
key StorageKey
prevalue []byte
}
codeChange struct {
account *common.Address
prevcode, prevhash []byte
}
contractOwnerChange struct {
account *common.Address
prevOwner common.Address
}
// Changes to other state values.
refundChange struct {
prev uint64
}
addLogChange struct {
txhash common.Hash
}
touchChange struct {
account *common.Address
//prev bool
//prevDirty bool
}
)
func (ch createObjectChange) revert(s *StateDB) {
delete(s.stateObjects, *ch.account)
delete(s.stateObjectsDirty, *ch.account)
}
func (ch createObjectChange) dirtied() *common.Address {
return ch.account
}
func (ch resetObjectChange) revert(s *StateDB) {
s.setStateObject(ch.prev)
}
func (ch resetObjectChange) dirtied() *common.Address {
return nil
}
func (ch suicideChange) revert(s *StateDB) {
obj := s.getStateObject(*ch.account)
if obj != nil {
obj.suicided = ch.prev
obj.setBalance(ch.prevbalance)
}
}
func (ch suicideChange) dirtied() *common.Address {
return ch.account
}
var ripemd = common.HexToAddress("0000000000000000000000000000000000000003")
func (ch touchChange) revert(s *StateDB) {
}
func (ch touchChange) dirtied() *common.Address {
return ch.account
}
func (ch balanceChange) revert(s *StateDB) {
s.getStateObject(*ch.account).setBalance(ch.prev)
}
func (ch balanceChange) dirtied() *common.Address {
return ch.account
}
func (ch nonceSetChange) revert(s *StateDB) {
s.getStateObject(*ch.account).setTxNonceSet(ch.prev)
}
func (ch nonceSetChange) dirtied() *common.Address {
return ch.account
}
func (ch packageNonceSetChange) revert(s *StateDB) {
// pkg exec will not fail
}
func (ch packageNonceSetChange) dirtied() *common.Address {
return ch.account
}
func (ch codeChange) revert(s *StateDB) {
s.getStateObject(*ch.account).setCode(common.BytesToHash(ch.prevhash), ch.prevcode)
}
func (ch codeChange) dirtied() *common.Address {
return ch.account
}
func (ch contractOwnerChange) revert(s *StateDB) {
s.getStateObject(*ch.account).setContractOwner(ch.prevOwner)
}
func (ch contractOwnerChange) dirtied() *common.Address {
return ch.account
}
func (ch storageChange) revert(s *StateDB) {
s.getStateObject(*ch.account).setState(ch.key, ch.prevalue)
}
func (ch storageChange) dirtied() *common.Address {
return ch.account
}
func (ch refundChange) revert(s *StateDB) {
s.refund = ch.prev
}
func (ch refundChange) dirtied() *common.Address {
return nil
}
func (ch addLogChange) revert(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]
}
s.logSize--
}
func (ch addLogChange) dirtied() *common.Address {
return nil
}