-
Notifications
You must be signed in to change notification settings - Fork 663
/
tx.go
177 lines (151 loc) · 3.96 KB
/
tx.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
// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package execute
import (
"context"
"errors"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow"
"github.com/ava-labs/avalanchego/snow/engine/snowman/block"
"github.com/ava-labs/avalanchego/utils"
"github.com/ava-labs/avalanchego/utils/hashing"
"github.com/ava-labs/avalanchego/utils/wrappers"
"github.com/ava-labs/avalanchego/vms/example/xsvm/state"
"github.com/ava-labs/avalanchego/vms/example/xsvm/tx"
"github.com/ava-labs/avalanchego/vms/platformvm/warp"
)
const (
QuorumNumerator = 2
QuorumDenominator = 3
)
var (
_ tx.Visitor = (*Tx)(nil)
errFeeTooHigh = errors.New("fee too high")
errWrongChainID = errors.New("wrong chainID")
errMissingBlockContext = errors.New("missing block context")
errDuplicateImport = errors.New("duplicate import")
)
type Tx struct {
Context context.Context
ChainContext *snow.Context
Database database.KeyValueReaderWriterDeleter
SkipVerify bool
BlockContext *block.Context
TxID ids.ID
Sender ids.ShortID
TransferFee uint64
ExportFee uint64
ImportFee uint64
}
func (t *Tx) Transfer(tf *tx.Transfer) error {
if tf.MaxFee < t.TransferFee {
return errFeeTooHigh
}
if tf.ChainID != t.ChainContext.ChainID {
return errWrongChainID
}
return utils.Err(
state.IncrementNonce(t.Database, t.Sender, tf.Nonce),
state.DecreaseBalance(t.Database, t.Sender, tf.ChainID, t.TransferFee),
state.DecreaseBalance(t.Database, t.Sender, tf.AssetID, tf.Amount),
state.IncreaseBalance(t.Database, tf.To, tf.AssetID, tf.Amount),
)
}
func (t *Tx) Export(e *tx.Export) error {
if e.MaxFee < t.ExportFee {
return errFeeTooHigh
}
if e.ChainID != t.ChainContext.ChainID {
return errWrongChainID
}
payload, err := tx.NewPayload(
t.Sender,
e.Nonce,
e.IsReturn,
e.Amount,
e.To,
)
if err != nil {
return err
}
message, err := warp.NewUnsignedMessage(
t.ChainContext.NetworkID,
e.ChainID,
payload.Bytes(),
)
if err != nil {
return err
}
var errs wrappers.Errs
errs.Add(
state.IncrementNonce(t.Database, t.Sender, e.Nonce),
state.DecreaseBalance(t.Database, t.Sender, e.ChainID, t.ExportFee),
)
if e.IsReturn {
errs.Add(
state.DecreaseBalance(t.Database, t.Sender, e.PeerChainID, e.Amount),
)
} else {
errs.Add(
state.DecreaseBalance(t.Database, t.Sender, e.ChainID, e.Amount),
state.IncreaseLoan(t.Database, e.PeerChainID, e.Amount),
)
}
errs.Add(
state.SetMessage(t.Database, t.TxID, message),
)
return errs.Err
}
func (t *Tx) Import(i *tx.Import) error {
if i.MaxFee < t.ImportFee {
return errFeeTooHigh
}
if t.BlockContext == nil {
return errMissingBlockContext
}
message, err := warp.ParseMessage(i.Message)
if err != nil {
return err
}
var errs wrappers.Errs
errs.Add(
state.IncrementNonce(t.Database, t.Sender, i.Nonce),
state.DecreaseBalance(t.Database, t.Sender, t.ChainContext.ChainID, t.ImportFee),
)
payload, err := tx.ParsePayload(message.Payload)
if err != nil {
return err
}
if payload.IsReturn {
errs.Add(
state.IncreaseBalance(t.Database, payload.To, t.ChainContext.ChainID, payload.Amount),
state.DecreaseLoan(t.Database, message.SourceChainID, payload.Amount),
)
} else {
errs.Add(
state.IncreaseBalance(t.Database, payload.To, message.SourceChainID, payload.Amount),
)
}
var loanID ids.ID = hashing.ComputeHash256Array(message.UnsignedMessage.Bytes())
hasLoanID, err := state.HasLoanID(t.Database, message.SourceChainID, loanID)
if hasLoanID {
return errDuplicateImport
}
errs.Add(
err,
state.AddLoanID(t.Database, message.SourceChainID, loanID),
)
if t.SkipVerify || errs.Errored() {
return errs.Err
}
return message.Signature.Verify(
t.Context,
&message.UnsignedMessage,
t.ChainContext.NetworkID,
t.ChainContext.ValidatorState,
t.BlockContext.PChainHeight,
QuorumNumerator,
QuorumDenominator,
)
}