105 lines
3.9 KiB
Markdown
105 lines
3.9 KiB
Markdown
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> Name
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爬取币安公告自动出售将要下架币crawl-Binance-announcements-and-sell-Delist-coin
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> Author
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小草
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> Strategy Description
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爬取币安公告页面，观察近两次的下架信息，具体格式为“Binance将下架CLOAK、MOD、SALT、SUB、WINGS”、“Binance将下架BCN，CHAT，ICN，TRIG”。
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爬虫将以“将下架”为关键词爬取新的下架公告，当然不排除币安更改公告格式，可参考此策略加以完善。由于爬虫任务过于简单，将用简单的JavaScript编写。爬取到下架币后，将检查账户信息，如果存在下架币，以较低的价格全部卖出，如果存在未完成订单，先撤销。直到将所持有的下架币完全卖出。
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具体分析，参考帖子：https://zhuanlan.zhihu.com/p/57012933
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> Source (javascript)
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``` javascript
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var exchangeInfo = JSON.parse(HttpQuery('https://api.binance.com/api/v1/exchangeInfo'))
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var pairInfo = {}
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var downList = []
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if(exchangeInfo){
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for (var i=0; i<exchangeInfo.symbols.length; i++){
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var info = exchangeInfo.symbols[i];
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pairInfo[info.symbol] = {minQty:parseFloat(info.filters[2].minQty),tickerSize:parseFloat(info.filters[0].tickSize),
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stepSize:parseFloat(info.filters[2].stepSize), minNotional:parseFloat(info.filters[3].minNotional)}
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}
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}else{
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Log('fail to get exchangeInfo')
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}
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function sellAll(coin, free){
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var symbol = coin + 'BTC'
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exchange.IO("currency", coin+'_BTC')
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var ticker = _C(exchange.GetTicker)
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var sellPrice = _N(ticker.Buy*0.7, parseInt((Math.log10(1.1/pairInfo[symbol].tickerSize))))
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var sellAmount = _N(free, parseInt((Math.log10(1.1/pairInfo[symbol].stepSize))))
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if (sellAmount > pairInfo[symbol].minQty && sellPrice*sellAmount > pairInfo[symbol].minNotional){
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var id = exchange.Sell(sellPrice, sellAmount, symbol)
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exchange.CancelOrder(order.orderId)
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}
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}
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function cancellOrder(){
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var openOrders = exchange.IO('api', 'GET', '/api/v3/openOrders')
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for (var i=0; i<openOrders.length; i++){
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var order = openOrders[i];
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for (var j=0;j<downList.length;j++){
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if(order.symbol.startsWith(downList[j])){
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var currency = downList[j] + '_' + order.symbol.slice(downList[j].length);
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Log('delist coin exist, cancel all orders first', currency)
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exchange.IO("currency", currency)
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exchange.CancelOrder(order.orderId)
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}
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}
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}
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}
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function checkAccount(){
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var done = false
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while(!done){
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account = _C(exchange.GetAccount)
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done = true
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for (var i=0; i<account.Info.balances.length; i++){
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if(downList.indexOf(account.Info.balances[i].asset)>-1 && parseFloat(account.Info.balances[i].free)>pairInfo[account.Info.balances[i].asset+'BTC'].minQty){
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Log('this coin will be dumped', account.Info.balances[i].asset)
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sellAll(account.Info.balances[i].asset, parseFloat(account.Info.balances[i].free))
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done = false
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}
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}
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Sleep(1000)
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}
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Log('sell done')
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}
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function main() {
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var title = ''
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while(true){
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var html = HttpQuery('https://support.binance.com/hc/en-us/sections/115000202591-Latest-News')
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html = html.slice(html.indexOf('Delist '),html.length)
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if(html){
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if(html.slice(7,html.indexOf('</a>')) != title){
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title = html.slice(7,html.indexOf('</a>'))
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downList = html.slice(7,html.indexOf('</a>')).replace(' and ', ',').split(',')
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Log('new announcement，will delist:', downList)
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cancellOrder()
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checkAccount()
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}else{
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Log('new announcement was not found')
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}
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}else{
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Log('web spider wrong')
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}
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Sleep(60*1000)
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}
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}
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```
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> Detail
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https://www.fmz.com/strategy/137450
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> Last Modified
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2019-07-03 16:16:39
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