-
Notifications
You must be signed in to change notification settings - Fork 2
/
scraper.go
310 lines (282 loc) · 8.19 KB
/
scraper.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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
package main
import (
"errors"
"reflect"
"regexp"
"strconv"
"strings"
"github.com/gocolly/colly"
"github.com/levigross/grequests"
"go.uber.org/zap"
)
var coinToResolverMapping = map[string]func(coinUppercase string, address string) (map[string]float64, error){
"BTC": getBalanceChainz,
"LTC": getBalanceChainz,
"DASH": getBalanceChainz,
"STRAT": getBalanceChainz,
"LUX": getBalanceChainz,
"DGB": getBalanceChainz,
"XZC": getBalanceChainz,
"VIA": getBalanceChainz,
"VTC": getBalanceChainz,
"ETH": getER20Tokens,
"LSK": getBalanceLisk,
"NEO": getBalanceNeo,
"ETC": getBalanceEtc,
}
func getCoinMappingToArray() []string {
var SupportedColdWalletCoins = []string{}
for currency := range coinToResolverMapping {
SupportedColdWalletCoins = append(SupportedColdWalletCoins, currency)
}
return SupportedColdWalletCoins
}
func resolveCoinHandler(input interface{}) (interface{}, error) {
balanceStruct, ok := input.(BalanceSimple)
if ok != true {
return nil, errors.New("not BalanceSimple struct")
}
handler, ok := coinToResolverMapping[balanceStruct.Currency]
if ok != true {
return nil, errors.New("no handler found for: " + balanceStruct.Currency)
}
res, err := handler(balanceStruct.Currency, balanceStruct.Address)
if err != nil {
return nil, err
}
output := []BalanceSimple{}
for currency, balance := range res {
output = append(output, BalanceSimple{
Address: balanceStruct.Address,
Comment: balanceStruct.Comment,
Currency: currency,
Balance: balance,
})
}
return output, nil
}
func resolveCoins(coins []BalanceSimple) []BalanceSimple {
// wrap
workload := []AsyncTask{}
for _, coin := range coins {
workload = append(workload, AsyncTask{
task: coin,
exec: resolveCoinHandler,
})
}
res := asyncRun(workload, 10)
// unwrap
output := []BalanceSimple{}
for _, taskRes := range res {
if t, ok := taskRes.GetResult().([]BalanceSimple); ok {
output = append(output, t...)
}
}
return output
}
func getParams(regEx, url string) (paramsMap map[string]string) {
var compRegEx = regexp.MustCompile(regEx)
match := compRegEx.FindStringSubmatch(url)
paramsMap = make(map[string]string)
for i, name := range compRegEx.SubexpNames() {
if i > 0 && i <= len(match) {
paramsMap[name] = match[i]
}
}
return
}
func getBalanceEtc(coin string, address string) (map[string]float64, error) {
output := make(map[string]float64)
c := colly.NewCollector()
c.OnHTML(".addr-details .dl-horizontal", func(e *colly.HTMLElement) {
txt := e.DOM.Text()
params := getParams(`(?P<Value>[0-9\.]{0,40})\sEther`, txt)
if len(params) == 1 {
output[coin], _ = strconv.ParseFloat(params["Value"], 64)
}
})
c.Visit("https://gastracker.io/addr/" + address)
return output, nil
}
func getBalanceNeo(coin string, address string) (map[string]float64, error) {
output := make(map[string]float64)
c := colly.NewCollector()
c.OnHTML("#wallet-graph", func(e *colly.HTMLElement) {
txt, _ := e.DOM.Find(".individual-wallet-box:nth-child(1)").Html()
params := getParams(`\>(?P<Value>[0-9\.]{0,40})<\/p\>`, txt)
if len(params) == 1 {
output[coin], _ = strconv.ParseFloat(params["Value"], 64)
}
})
c.Visit("https://neoscan.io/address/" + address)
return output, nil
}
func getER20Tokens(coinUppercase string, address string) (map[string]float64, error) {
output := make(map[string]float64)
c := colly.NewCollector()
c.OnHTML("#balancelist a", func(e *colly.HTMLElement) {
html, _ := e.DOM.Html()
result := getParams(`(\>|\s)(?P<Name>[A-Z]{0,3})\<\/i\>(.*)\<br\/\>(?P<Value>[0-9,\.]{0,20})\s[A-Z]{0,3}`, html)
if len(result) == 3 {
output[result["Name"]], _ = strconv.ParseFloat(strings.Replace(result["Value"], ",", "", -1), 64)
}
})
c.OnHTML("#ContentPlaceHolder1_divSummary table", func(e *colly.HTMLElement) {
html, _ := e.DOM.Find("tbody tr:nth-child(1)").Html()
html = strings.Replace(html, "<b>.</b>", ".", -1)
html = strings.Replace(html, ",", "", -1)
result := getParams(`(?P<Value>[0-9\.]{0,40})\sEther`, html)
if reflect.TypeOf(result["Value"]).String() == "string" && len(result["Value"]) > 0 {
res, err := strconv.ParseFloat(result["Value"], 64)
if err == nil && res > 0 {
output["ETH"] = res
}
}
})
c.Visit("https://etherscan.io/address/" + address)
logger.Debug("fetched coin erc20", zap.Int("coins", len(output)))
if len(output) == 0 {
return output, errors.New("erc20-address: " + address + " didnt yield anything")
}
return output, nil
}
func getCoins(skip int, limit int) map[string]Coin {
resp, err := grequests.Get("https://api.coinmarketcap.com/v2/ticker/?convert=BTC&sort=id&start="+strconv.Itoa(skip)+"&limit="+strconv.Itoa(limit), nil)
if err != nil {
panic(errors.New("request failed"))
}
var coinRes struct {
Data map[string]Coin `json:"data"`
}
err = resp.JSON(&coinRes)
if err != nil {
panic(errors.New("request decode failed"))
}
output := make(map[string]Coin)
for _, coin := range coinRes.Data {
output[coin.Symbol] = Coin{
Id: coin.Id,
Name: coin.Name,
Symbol: coin.Symbol,
Quote: coin.Quote,
BtcPrice: coin.Quote["BTC"]["price"], // TODO: find safer way
UsdPrice: coin.Quote["USD"]["price"], // TODO: find safer way
}
}
return output
}
func getBalanceChainz(coinUppercase string, address string) (map[string]float64, error) {
output := make(map[string]float64)
resp, err := grequests.Get("https://chainz.cryptoid.info/"+strings.ToLower(coinUppercase)+"/api.dws?q=getbalance&a="+address, nil)
if err != nil {
return output, errors.New("request failed to fetch balance of " + coinUppercase + " failed")
}
val, err := strconv.ParseFloat(resp.String(), 64)
if err != nil {
return output, errors.New("parse float blanace of " + coinUppercase + " failed")
}
output[coinUppercase] = val
logger.Debug("fetched coin balance chainz", zap.String("coin", coinUppercase), zap.Float64("balance", val))
return output, nil
}
func getBalanceLisk(coin string, address string) (map[string]float64, error) {
output := make(map[string]float64)
resp, err := grequests.Get("https://explorer.lisk.io/api/getAccount?address="+address, nil)
if err != nil {
return nil, errors.New("request failed to fetch balance of " + coin + " failed")
}
data := struct {
Balance string `json:"balance"`
}{}
resp.JSON(&data)
balanceFloat, err := strconv.ParseFloat(data.Balance, 64)
output[coin] = balanceFloat / 100000000
if err != nil {
return nil, errors.New("int parse failed for " + coin)
}
return output, nil
}
type AsyncTask struct {
error error
task interface{}
result interface{}
exec func(interface{}) (interface{}, error)
}
func (at *AsyncTask) Run() AsyncTask {
res, err := at.exec(at.task)
at.result = res
at.error = err
return *at
}
func (at *AsyncTask) GetResult() interface{} {
return at.result
}
func asyncRun(workload []AsyncTask, workerCount int) []AsyncTask {
inQueue := make(chan AsyncTask, len(workload))
outQueue := make(chan AsyncTask, len(workload))
done := []AsyncTask{}
if len(workload) == 0 {
return []AsyncTask{}
}
// workers
for i := 0; i < workerCount; i++ {
go func(workerId int) {
for {
select {
case task, more := <-inQueue:
if more {
outQueue <- task.Run()
} else {
return
}
}
}
}(i)
}
// writer
go func() {
for _, task := range workload {
inQueue <- task
}
close(inQueue)
}()
// chan to array
for taskDone := range outQueue {
done = append(done, taskDone)
if len(done) == len(workload) {
break
}
}
return done
}
func getCoinsAsync() map[string]Coin {
output := map[string]Coin{}
limit := 100 // coins fetched per request
totalLimit := 2000 // max coins fetched in total
workload := []AsyncTask{}
handler := func(input interface{}) (interface{}, error) {
skip, ok := input.(int)
if ok != true {
return nil, errors.New("not int type")
}
res := getCoins(skip, limit)
logger.Debug("fetched coin infos", zap.Int("skip", skip))
return res, nil
}
// wrap
for i := 0; i < totalLimit; {
workload = append(workload, AsyncTask{
task: i + 1,
exec: handler,
})
i += limit
}
res := asyncRun(workload, 10)
// unwrap
for _, reqRes := range res {
for currency, coin := range reqRes.GetResult().(map[string]Coin) {
output[currency] = coin
}
}
return output
}