/
deposit_erc20.go
286 lines (224 loc) · 7.39 KB
/
deposit_erc20.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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
package erc20
import (
"fmt"
"math/big"
"github.com/spf13/cobra"
"github.com/umbracle/ethgo"
"golang.org/x/sync/errgroup"
"github.com/0xPolygon/polygon-edge/command"
"github.com/0xPolygon/polygon-edge/command/bridge/common"
"github.com/0xPolygon/polygon-edge/command/rootchain/helper"
"github.com/0xPolygon/polygon-edge/consensus/polybft/contractsapi"
helperCommon "github.com/0xPolygon/polygon-edge/helper/common"
"github.com/0xPolygon/polygon-edge/txrelayer"
"github.com/0xPolygon/polygon-edge/types"
)
type depositERC20Params struct {
*common.ERC20BridgeParams
minterKey string
}
var (
// depositParams is abstraction for provided bridge parameter values
dp *depositERC20Params = &depositERC20Params{ERC20BridgeParams: common.NewERC20BridgeParams()}
)
// GetCommand returns the bridge deposit command
func GetCommand() *cobra.Command {
depositCmd := &cobra.Command{
Use: "deposit-erc20",
Short: "Deposits ERC 20 tokens from the origin to the destination chain",
PreRunE: preRunCommand,
Run: runCommand,
}
dp.RegisterCommonFlags(depositCmd)
depositCmd.Flags().StringSliceVar(
&dp.Amounts,
common.AmountsFlag,
nil,
"amounts to send to receiving accounts",
)
depositCmd.Flags().StringVar(
&dp.TokenAddr,
common.RootTokenFlag,
"",
"root ERC 20 token address",
)
depositCmd.Flags().StringVar(
&dp.PredicateAddr,
common.RootPredicateFlag,
"",
"root ERC 20 token predicate address",
)
depositCmd.Flags().StringVar(
&dp.minterKey,
common.MinterKeyFlag,
"",
common.MinterKeyFlagDesc,
)
_ = depositCmd.MarkFlagRequired(common.ReceiversFlag)
_ = depositCmd.MarkFlagRequired(common.AmountsFlag)
_ = depositCmd.MarkFlagRequired(common.RootTokenFlag)
_ = depositCmd.MarkFlagRequired(common.RootPredicateFlag)
return depositCmd
}
func preRunCommand(cmd *cobra.Command, _ []string) error {
return dp.Validate()
}
func runCommand(cmd *cobra.Command, _ []string) {
outputter := command.InitializeOutputter(cmd)
defer outputter.WriteOutput()
depositorKey, err := helper.DecodePrivateKey(dp.SenderKey)
if err != nil {
outputter.SetError(fmt.Errorf("failed to initialize depositor private key: %w", err))
}
depositorAddr := depositorKey.Address()
txRelayer, err := txrelayer.NewTxRelayer(txrelayer.WithIPAddress(dp.JSONRPCAddr))
if err != nil {
outputter.SetError(fmt.Errorf("failed to initialize tx relayer: %w", err))
return
}
amounts := make([]*big.Int, len(dp.Amounts))
aggregateAmount := new(big.Int)
for i, amountRaw := range dp.Amounts {
amountRaw := amountRaw
amount, err := helperCommon.ParseUint256orHex(&amountRaw)
if err != nil {
outputter.SetError(fmt.Errorf("failed to decode provided amount %s: %w", amountRaw, err))
return
}
amounts[i] = amount
aggregateAmount.Add(aggregateAmount, amount)
}
if dp.minterKey != "" {
minterKey, err := helper.DecodePrivateKey(dp.minterKey)
if err != nil {
outputter.SetError(fmt.Errorf("invalid minter key provided: %w", err))
return
}
// mint tokens to depositor, so he is able to send them
mintTxn, err := helper.CreateMintTxn(types.Address(depositorAddr),
types.StringToAddress(dp.TokenAddr), aggregateAmount, !dp.ChildChainMintable)
if err != nil {
outputter.SetError(fmt.Errorf("mint transaction creation failed: %w", err))
return
}
receipt, err := txRelayer.SendTransaction(mintTxn, minterKey)
if err != nil {
outputter.SetError(fmt.Errorf("failed to send mint transaction to depositor %s: %w", depositorAddr, err))
return
}
if receipt.Status == uint64(types.ReceiptFailed) {
outputter.SetError(fmt.Errorf("failed to mint tokens to depositor %s", depositorAddr))
return
}
}
// approve erc20 predicate
approveTxn, err := helper.CreateApproveERC20Txn(aggregateAmount,
types.StringToAddress(dp.PredicateAddr),
types.StringToAddress(dp.TokenAddr),
!dp.ChildChainMintable,
)
if err != nil {
outputter.SetError(fmt.Errorf("failed to create root erc 20 approve transaction: %w", err))
return
}
receipt, err := txRelayer.SendTransaction(approveTxn, depositorKey)
if err != nil {
outputter.SetError(fmt.Errorf("failed to send root erc 20 approve transaction: %w", err))
return
}
if receipt.Status == uint64(types.ReceiptFailed) {
outputter.SetError(fmt.Errorf("failed to approve root erc 20 predicate"))
return
}
type bridgeTxData struct {
exitEventIDs []*big.Int
blockNumber uint64
childTokenAddr *types.Address
}
g, ctx := errgroup.WithContext(cmd.Context())
bridgeTxCh := make(chan bridgeTxData, len(dp.Receivers))
exitEventIDs := make([]*big.Int, 0, len(dp.Receivers))
blockNumbers := make([]uint64, 0, len(dp.Receivers))
for i := range dp.Receivers {
receiver := dp.Receivers[i]
amount := amounts[i]
g.Go(func() error {
select {
case <-ctx.Done():
return ctx.Err()
default:
// deposit tokens
depositTxn, err := createDepositTxn(types.Address(depositorAddr), types.StringToAddress(receiver), amount)
if err != nil {
return fmt.Errorf("failed to create tx input: %w", err)
}
var receipt *ethgo.Receipt
receipt, err = txRelayer.SendTransaction(depositTxn, depositorKey)
if err != nil {
return fmt.Errorf("receiver: %s, amount: %s, error: %w", receiver, amount, err)
}
if receipt.Status == uint64(types.ReceiptFailed) {
return fmt.Errorf("receiver: %s, amount: %s", receiver, amount)
}
var exitEventIDs []*big.Int
if dp.ChildChainMintable {
if exitEventIDs, err = common.ExtractExitEventIDs(receipt); err != nil {
return fmt.Errorf("failed to extract exit event: %w", err)
}
}
// populate child token address if a token is mapped alongside with deposit
childToken, err := common.ExtractChildTokenAddr(receipt, dp.ChildChainMintable)
if err != nil {
return fmt.Errorf("failed to extract child token address: %w", err)
}
// send aggregated data to channel if everything went ok
bridgeTxCh <- bridgeTxData{
blockNumber: receipt.BlockNumber,
exitEventIDs: exitEventIDs,
childTokenAddr: childToken,
}
return nil
}
})
}
if err = g.Wait(); err != nil {
outputter.SetError(fmt.Errorf("sending deposit transactions failed: %w", err))
return
}
close(bridgeTxCh)
var childToken *types.Address
for x := range bridgeTxCh {
if x.exitEventIDs != nil {
exitEventIDs = append(exitEventIDs, x.exitEventIDs...)
}
blockNumbers = append(blockNumbers, x.blockNumber)
if x.childTokenAddr != nil {
childToken = x.childTokenAddr
}
}
outputter.SetCommandResult(
&common.BridgeTxResult{
Sender: depositorAddr.String(),
Receivers: dp.Receivers,
Amounts: dp.Amounts,
ExitEventIDs: exitEventIDs,
ChildTokenAddr: childToken,
BlockNumbers: blockNumbers,
Title: "DEPOSIT ERC 20",
})
}
// createDepositTxn encodes parameters for deposit function on rootchain predicate contract
func createDepositTxn(sender, receiver types.Address, amount *big.Int) (*ethgo.Transaction, error) {
depositToFn := &contractsapi.DepositToRootERC20PredicateFn{
RootToken: types.StringToAddress(dp.TokenAddr),
Receiver: receiver,
Amount: amount,
}
input, err := depositToFn.EncodeAbi()
if err != nil {
return nil, fmt.Errorf("failed to encode provided parameters: %w", err)
}
addr := ethgo.Address(types.StringToAddress(dp.PredicateAddr))
return helper.CreateTransaction(ethgo.Address(sender), &addr,
input, nil, !dp.ChildChainMintable), nil
}