/
wallet.go
254 lines (231 loc) · 6.71 KB
/
wallet.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
package module
import (
"context"
"fmt"
"io"
"io/ioutil"
"math/big"
"net/http"
"time"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/crypto"
"github.com/filecoin-project/lotus/chain/types"
logger "github.com/ipfs/go-log/v2"
"github.com/textileio/powergate/lotus"
)
const (
feeThreshold = 1_000_000
)
var (
log = logger.Logger("wallet")
networkFaucet = map[string]string{}
)
// Module exposes the filecoin wallet api.
type Module struct {
clientBuilder lotus.ClientBuilder
iAmount *big.Int
masterAddr address.Address
networkName string
}
// New creates a new wallet module.
func New(clientBuilder lotus.ClientBuilder, maddr address.Address, iam big.Int, autocreate bool, networkName string) (*Module, error) {
m := &Module{
clientBuilder: clientBuilder,
iAmount: &iam,
masterAddr: maddr,
networkName: networkName,
}
if maddr == address.Undef && autocreate {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
newMasterAddr, err := m.NewAddress(ctx, "bls")
if err != nil {
return nil, fmt.Errorf("creating and funding master addr: %s", err)
}
log.Infof("Auto-created master wallet addr: %s", newMasterAddr)
if err := m.FundFromFaucet(ctx, newMasterAddr); err != nil {
return nil, fmt.Errorf("funding new master addr: %s", err)
}
log.Info("Autocreated master wallet addr funded successfully")
maddr, _ = address.NewFromString(newMasterAddr)
m = &Module{
clientBuilder: clientBuilder,
iAmount: &iam,
masterAddr: maddr,
}
}
return m, nil
}
// MasterAddr returns the master address.
// Will return address.Undef is Powergate was started with no master address.
func (m *Module) MasterAddr() address.Address {
return m.masterAddr
}
// NewAddress creates a new address.
func (m *Module) NewAddress(ctx context.Context, typ string) (string, error) {
var ty types.KeyType
if typ == "bls" {
ty = types.KTBLS
} else if typ == "secp256k1" {
ty = types.KTSecp256k1
} else {
return "", fmt.Errorf("unknown address type %s", typ)
}
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return "", fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
addr, err := client.WalletNew(ctx, ty)
if err != nil {
return "", err
}
if m.masterAddr != address.Undef {
balance, err := client.WalletBalance(ctx, m.masterAddr)
if err != nil {
return "", fmt.Errorf("getting balance from master addr: %s", err)
}
if balance.LessThan(types.BigAdd(types.BigInt{Int: m.iAmount}, types.NewInt(feeThreshold))) {
return "", fmt.Errorf("balance %d is less than allowed threshold", balance)
}
go func() {
client, cls, err := m.clientBuilder(context.Background())
if err != nil {
log.Errorf("creating lotus client: %s", err)
return
}
defer cls()
msg := &types.Message{
From: m.masterAddr,
To: addr,
Value: types.BigInt{Int: m.iAmount},
}
smsg, err := client.MpoolPushMessage(context.Background(), msg, nil)
if err != nil {
log.Errorf("transferring funds to new address: %s", err)
return
}
log.Infof("%s funding transaction message: %s", addr, smsg.Message.Cid())
}()
}
return addr.String(), nil
}
// Sign signs a message with an address.
func (m *Module) Sign(ctx context.Context, addr string, message []byte) ([]byte, error) {
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return nil, fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
waddr, err := address.NewFromString(addr)
if err != nil {
return nil, fmt.Errorf("parsing wallet address: %s", err)
}
sig, err := client.WalletSign(ctx, waddr, message)
if err != nil {
return nil, fmt.Errorf("lotus signing message: %s", err)
}
sigBytes, err := sig.MarshalBinary()
if err != nil {
return nil, fmt.Errorf("marshaling signature: %s", err)
}
return sigBytes, nil
}
// Verify verifies a message signature from an address.
func (m *Module) Verify(ctx context.Context, addr string, message, signature []byte) (bool, error) {
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return false, fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
waddr, err := address.NewFromString(addr)
if err != nil {
return false, fmt.Errorf("parsing wallet address: %s", err)
}
var sig crypto.Signature
if err := sig.UnmarshalBinary(signature); err != nil {
return false, fmt.Errorf("unmarshaling signature: %s", err)
}
return client.WalletVerify(ctx, waddr, message, &sig)
}
// List returns all wallet addresses.
func (m *Module) List(ctx context.Context) ([]string, error) {
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return nil, fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
addrs, err := client.WalletList(ctx)
if err != nil {
return nil, fmt.Errorf("getting wallet addresses: %v", err)
}
ret := make([]string, len(addrs))
for i, addr := range addrs {
ret[i] = addr.String()
}
return ret, nil
}
// Balance returns the balance of the specified address.
func (m *Module) Balance(ctx context.Context, addr string) (*big.Int, error) {
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return nil, fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
a, err := address.NewFromString(addr)
if err != nil {
return nil, err
}
b, err := client.WalletBalance(ctx, a)
if err != nil {
return nil, fmt.Errorf("getting balance from lotus: %s", err)
}
return b.Int, nil
}
// SendFil sends fil from one address to another.
func (m *Module) SendFil(ctx context.Context, from string, to string, amount *big.Int) error {
f, err := address.NewFromString(from)
if err != nil {
return err
}
t, err := address.NewFromString(to)
if err != nil {
return err
}
msg := &types.Message{
From: f,
To: t,
Value: types.BigInt{Int: amount},
}
client, cls, err := m.clientBuilder(ctx)
if err != nil {
return fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
_, err = client.MpoolPushMessage(ctx, msg, nil)
return err
}
// FundFromFaucet make a faucet call to fund the provided wallet address.
func (m *Module) FundFromFaucet(ctx context.Context, addr string) error {
faucet, ok := networkFaucet[m.networkName]
if !ok {
return fmt.Errorf("unknown faucet for network %s", m.networkName)
}
req, err := http.NewRequest("GET", faucet+"/send", nil)
if err != nil {
return fmt.Errorf("parsing fountain url: %s", err)
}
q := req.URL.Query()
q.Add("address", addr)
req.URL.RawQuery = q.Encode()
r, err := http.Get(req.URL.String())
if err != nil {
return fmt.Errorf("calling the fountain: %s", err)
}
defer func() { _ = r.Body.Close() }()
_, _ = io.Copy(ioutil.Discard, r.Body)
if r.StatusCode != http.StatusOK {
return fmt.Errorf("fountain request not OK: %s", r.Status)
}
return nil
}