-
Notifications
You must be signed in to change notification settings - Fork 49
/
vm.go
247 lines (224 loc) · 7.6 KB
/
vm.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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
package vm
import (
"fmt"
"github.com/idena-network/idena-go/blockchain/attachments"
"github.com/idena-network/idena-go/blockchain/types"
"github.com/idena-network/idena-go/common"
"github.com/idena-network/idena-go/common/math"
"github.com/idena-network/idena-go/config"
"github.com/idena-network/idena-go/core/appstate"
"github.com/idena-network/idena-go/stats/collector"
"github.com/idena-network/idena-go/vm/costs"
"github.com/idena-network/idena-go/vm/embedded"
env2 "github.com/idena-network/idena-go/vm/env"
"github.com/idena-network/idena-go/vm/wasm"
"github.com/pkg/errors"
)
var (
UnexpectedTx = errors.New("unexpected tx type")
)
type VM interface {
Run(tx *types.Transaction, from *common.Address, gasLimit int64, commitToEnv bool) *types.TxReceipt
Read(contractAddr common.Address, method string, args ...[]byte) ([]byte, error)
IsWasm(tx *types.Transaction) bool
ContractAddr(tx *types.Transaction, from *common.Address) common.Address
}
type VmImpl struct {
env *env2.EnvImp
appState *appstate.AppState
blockHeaderProvider wasm.BlockHeaderProvider
gasCounter *env2.GasCounter
statsCollector collector.StatsCollector
cfg *config.Config
head *types.Header
}
type VmCreator = func(appState *appstate.AppState, blockHeaderProvider wasm.BlockHeaderProvider, block *types.Header, statsCollector collector.StatsCollector, cfg *config.Config) VM
func NewVmImpl(appState *appstate.AppState, blockHeaderProvider wasm.BlockHeaderProvider, head *types.Header, statsCollector collector.StatsCollector, cfg *config.Config) VM {
gasCounter := new(env2.GasCounter)
return &VmImpl{env: env2.NewEnvImp(appState, head, gasCounter, statsCollector), appState: appState, gasCounter: gasCounter,
statsCollector: statsCollector, cfg: cfg, head: head, blockHeaderProvider: blockHeaderProvider}
}
func (vm *VmImpl) createContract(ctx env2.CallContext) embedded.Contract {
switch ctx.CodeHash() {
case embedded.TimeLockContract:
return embedded.NewTimeLock(ctx, vm.env, vm.statsCollector)
case embedded.OracleVotingContract:
if vm.cfg.Consensus.EnableUpgrade10 {
return embedded.NewOracleVotingContract2(ctx, vm.env, vm.statsCollector)
}
return embedded.NewOracleVotingContract(ctx, vm.env, vm.statsCollector)
case embedded.OracleLockContract:
return embedded.NewOracleLock2(ctx, vm.env, vm.statsCollector)
case embedded.RefundableOracleLockContract:
if vm.cfg.Consensus.EnableUpgrade10 {
return embedded.NewRefundableOracleLock2(ctx, vm.env, vm.statsCollector)
}
return embedded.NewRefundableOracleLock(ctx, vm.env, vm.statsCollector)
case embedded.MultisigContract:
return embedded.NewMultisig(ctx, vm.env, vm.statsCollector)
default:
return nil
}
}
func (vm *VmImpl) deploy(tx *types.Transaction, from *common.Address) (addr common.Address, err error) {
attach := attachments.ParseDeployContractAttachment(tx)
ctx := env2.NewDeployContextImpl(tx, from, attach.CodeHash)
addr = ctx.ContractAddr()
if attach == nil {
return addr, errors.New("can't parse attachment")
}
contract := vm.createContract(ctx)
if contract == nil {
return addr, errors.New("unknown contract")
}
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprint(r))
}
}()
err = contract.Deploy(attach.Args...)
vm.env.Deploy(ctx)
return addr, err
}
func (vm *VmImpl) call(tx *types.Transaction, from *common.Address) (addr common.Address, method string, err error) {
codeHash := vm.appState.State.GetCodeHash(*tx.To)
if codeHash == nil {
return common.Address{}, "", errors.New("destination is not a contract")
}
ctx := env2.NewCallContextImpl(tx, from, *codeHash)
attach := attachments.ParseCallContractAttachment(tx)
if attach == nil {
return ctx.ContractAddr(), "", errors.New("can't parse attachment")
}
contract := vm.createContract(ctx)
addr = ctx.ContractAddr()
if contract == nil {
return addr, "", errors.New("unknown contract")
}
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprint(r))
}
}()
err = contract.Call(attach.Method, attach.Args...)
return addr, attach.Method, err
}
func (vm *VmImpl) terminate(tx *types.Transaction, from *common.Address) (addr common.Address, err error) {
ctx := env2.NewCallContextImpl(tx, from, *vm.appState.State.GetCodeHash(*tx.To))
attach := attachments.ParseTerminateContractAttachment(tx)
if attach == nil {
return ctx.ContractAddr(), errors.New("can't parse attachment")
}
contract := vm.createContract(ctx)
addr = ctx.ContractAddr()
if contract == nil {
return addr, errors.New("unknown contract")
}
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprint(r))
}
}()
var stakeDest common.Address
var keysToSave [][]byte
stakeDest, keysToSave, err = contract.Terminate(attach.Args...)
if err == nil {
vm.env.Terminate(ctx, keysToSave, stakeDest)
}
return addr, err
}
func (vm *VmImpl) IsWasm(tx *types.Transaction) bool {
switch tx.Type {
case types.DeployContractTx:
attach := attachments.ParseDeployContractAttachment(tx)
return len(attach.Code) > 0
case types.CallContractTx:
codeHash := vm.appState.State.GetCodeHash(*tx.To)
if codeHash == nil {
return false
}
_, ok := embedded.AvailableContracts[*codeHash]
return !ok
}
return false
}
func (vm *VmImpl) ContractAddr(tx *types.Transaction, from *common.Address) common.Address {
switch tx.Type {
case types.CallContractTx, types.TerminateContractTx:
return *tx.To
case types.DeployContractTx:
if vm.IsWasm(tx) {
return wasm.CreateContractAddr(tx)
}
if from != nil {
return env2.ComputeContractAddr(tx, *from)
}
sender, _ := types.Sender(tx)
return env2.ComputeContractAddr(tx, sender)
}
panic("unknown tx type")
}
func (vm *VmImpl) Run(tx *types.Transaction, from *common.Address, gasLimit int64, commitToState bool) *types.TxReceipt {
if tx.Type != types.CallContractTx && tx.Type != types.DeployContractTx && tx.Type != types.TerminateContractTx {
return &types.TxReceipt{Success: false, Error: UnexpectedTx}
}
if vm.IsWasm(tx) {
wasmVm := wasm.NewWasmVM(vm.appState, vm.blockHeaderProvider, vm.head, vm.cfg, commitToState)
return wasmVm.Run(tx, costs.GasToWasmGas(uint64(gasLimit)))
}
vm.gasCounter.Reset(int(gasLimit))
vm.env.Reset()
var err error
var contractAddr common.Address
var method string
switch tx.Type {
case types.DeployContractTx:
method = "deploy"
contractAddr, err = vm.deploy(tx, from)
case types.CallContractTx:
contractAddr, method, err = vm.call(tx, from)
case types.TerminateContractTx:
method = "terminate"
contractAddr, err = vm.terminate(tx, from)
}
var events []*types.TxEvent
if err == nil && commitToState {
events = vm.env.Commit()
}
var sender common.Address
if from != nil {
sender = *from
} else {
sender, _ = types.Sender(tx)
}
usedGas := uint64(vm.gasCounter.UsedGas)
if gasLimit >= 0 {
usedGas = math.Min(usedGas, uint64(gasLimit))
}
return &types.TxReceipt{
GasUsed: usedGas,
TxHash: tx.Hash(),
Error: err,
Success: err == nil,
From: sender,
ContractAddress: contractAddr,
Events: events,
Method: method,
}
}
func (vm *VmImpl) Read(contractAddr common.Address, method string, args ...[]byte) ([]byte, error) {
var data []byte
var err error
defer func() {
if r := recover(); r != nil {
err = errors.New(fmt.Sprint(r))
}
}()
contract := vm.createContract(&env2.ReadContextImpl{Contract: contractAddr, Hash: *vm.appState.State.GetCodeHash(contractAddr)})
if contract == nil {
return nil, errors.New("unknown contract")
}
vm.gasCounter.Reset(-1)
data, err = contract.Read(method, args...)
return data, err
}