-
Notifications
You must be signed in to change notification settings - Fork 8
/
invoice_manager.go
128 lines (105 loc) · 2.85 KB
/
invoice_manager.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
package main
import (
"context"
"crypto/sha256"
"encoding/json"
"github.com/lightningnetwork/lnd/lnrpc"
"net/http"
"strconv"
)
var TorProxyURL = "socks5://127.0.0.1:9050"
type InvoiceManager struct {
Cfg *InvoiceManagerConfig
}
type InvoiceManagerConfig struct {
LndClient lnrpc.LightningClient
SettlementHandler *SettlementHandler
}
type InvoiceParams struct {
Msat int64
Description string
DescriptionHash []byte
}
func NewInvoiceManager(cfg *InvoiceManagerConfig) *InvoiceManager {
return &InvoiceManager{
Cfg: cfg,
}
}
func (m *InvoiceManager) handleInvoiceCreation(config ServerConfig) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Access-Control-Allow-Origin", "*")
keys, hasAmount := r.URL.Query()["amount"]
if !hasAmount || len(keys[0]) < 1 {
badRequestError(
w, "Mandatory URL Query parameter 'amount' "+
"is missing.")
return
}
mSat, isInt := strconv.Atoi(keys[0])
if isInt != nil {
badRequestError(w, "Amount needs to be a number "+
"denoting the number of msat.")
return
}
if mSat < config.MinSendableMsat || mSat > config.MaxSendableMsat {
badRequestError(w, "Wrong amount. Amount needs to "+
"be in between [%d,%d] msat",
config.MinSendableMsat, config.MaxSendableMsat)
return
}
comment := r.URL.Query().Get("comment")
if len(comment) > config.MaxCommentLength {
badRequestError(w, "Comment is too long, should be "+
"no longer than %d bytes",
config.MaxCommentLength)
return
}
metadata, err := metadataToString(config)
if err != nil {
log.Warnf("Unable to convert metadata to string: %v\n",
err)
}
// parameters ok, creating invoice
invoiceParams := InvoiceParams{
Msat: int64(mSat),
Description: metadata,
}
h := sha256.Sum256([]byte(invoiceParams.Description))
invoiceParams.DescriptionHash = h[:]
bolt11, r_hash, err := m.MakeInvoice(invoiceParams)
if err != nil {
log.Infof("Cannot create invoice: %s\n", err)
badRequestError(w, "Invoice creation failed.")
return
}
invoice := Invoice{
Pr: bolt11,
Routes: make([]string, 0),
SuccessAction: &SuccessAction{
Tag: "message",
Message: config.SuccessMessage,
},
}
m.Cfg.SettlementHandler.subscribeToInvoiceRpc(
context.Background(), r_hash, comment,
)
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(invoice)
}
}
func (m *InvoiceManager) MakeInvoice(params InvoiceParams) (string, []byte,
error) {
invoice := &lnrpc.Invoice{
ValueMsat: params.Msat,
Memo: params.Description,
DescriptionHash: params.DescriptionHash,
}
resp, err := m.Cfg.LndClient.AddInvoice(
context.Background(), invoice,
)
if err != nil {
return "", nil, err
}
return resp.PaymentRequest, resp.RHash, nil
}