Added gate.io orders to resolve #1108.

████ ███  To request new features or in case this commit breaks something for you,
████ ███  please, create a new github issue with all possible information for me,
▓███▀█▄   but never share your API Keys!
▒▓██ ███
░▒▓█ ███  Signed-off-by: Carles Tubio <ctubio@users.noreply.github.com>
 _______________________________
/ Hello, WORLD!                 \
|                               |
\ pssst.. 1 BTC = 30668.79 EUR. /
 -------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Makefile

@@ -2,7 +2,7 @@ K         ?= K.sh
 MAJOR      = 0
 MINOR      = 6
 PATCH      = 1
-BUILD      = 33
+BUILD      = 34
 
 OBLIGATORY = DISCLAIMER: This is strict non-violent software: \n$\
              if you hurt other living creatures, please stop; \n$\

README.md

@@ -30,7 +30,7 @@ The web UI is compatible with most web browsers/devices/resolutions, but Firefox
 ||with Post-Only Orders support|without Post-Only|
 |---|---|---|
 |**without Maker fees**|[BitMEX](https://www.bitmex.com/) <sub>([fees](https://www.bitmex.com/app/fees))</sub><br> &#10239; _REST + WebSocket_|*none*|
-|**with Maker and Taker fees**|[Coinbase](https://pro.coinbase.com/) <sub>([fees](https://pro.coinbase.com/orders/fees))</sub><br> &#10239; _REST + WebSocket + FIX_<br><br>[Binance](https://www.binance.com/) <sub>([fees](https://www.binance.com/en/fee/schedule))</sub><br> &#10239; _REST + WebSocket_<br><br>[Kraken](https://www.kraken.com/) <sub>([fees](https://www.kraken.com/features/fee-schedule))</sub><br> &#10239; _REST + WebSocket²_<br><br>[KuCoin](https://www.kucoin.com/) <sub>([fees](https://www.kucoin.com/vip/level))</sub><br> &#10239; _REST + WebSocket_<br><br>[Bitfinex](https://www.bitfinex.com/) <sub>([fees](https://www.bitfinex.com/fees))</sub><br>[Ethfinex](https://www.ethfinex.com/) <sub>([fees](https://www.ethfinex.com/fees))</sub><br> &#10239; _REST + WebSocket_<br><br>[HitBTC](https://hitbtc.com/) <sub>([fees](https://hitbtc.com/fee-tier))</sub><br>[Bequant](https://bequant.io/) <sub>([fees](https://bequant.io/fees-and-limits))</sub><br> &#10239; _REST + WebSocket²_<br><br>[Poloniex](https://www.poloniex.com/) <sub>([fees](https://poloniex.com/fees/))</sub><br> &#10239; _REST + WebSocket_|*none*|
+|**with Maker and Taker fees**|[Coinbase](https://pro.coinbase.com/) <sub>([fees](https://pro.coinbase.com/orders/fees))</sub><br> &#10239; _REST + WebSocket + FIX_<br><br>[Binance](https://www.binance.com/) <sub>([fees](https://www.binance.com/en/fee/schedule))</sub><br> &#10239; _REST + WebSocket_<br><br>[Kraken](https://www.kraken.com/) <sub>([fees](https://www.kraken.com/features/fee-schedule))</sub><br> &#10239; _REST + WebSocket²_<br><br>[KuCoin](https://www.kucoin.com/) <sub>([fees](https://www.kucoin.com/vip/level))</sub><br> &#10239; _REST + WebSocket_<br><br>[Bitfinex](https://www.bitfinex.com/) <sub>([fees](https://www.bitfinex.com/fees))</sub><br>[Ethfinex](https://www.ethfinex.com/) <sub>([fees](https://www.ethfinex.com/fees))</sub><br> &#10239; _REST + WebSocket_<br><br>[Gate.io](https://www.gate.io/) <sub>([fees](https://www.gate.io/fee))</sub><br> &#10239; _REST + WebSocket_<br><br>[HitBTC](https://hitbtc.com/) <sub>([fees](https://hitbtc.com/fee-tier))</sub><br>[Bequant](https://bequant.io/) <sub>([fees](https://bequant.io/fees-and-limits))</sub><br> &#10239; _REST + WebSocket²_<br><br>[Poloniex](https://www.poloniex.com/) <sub>([fees](https://poloniex.com/fees/))</sub><br> &#10239; _REST + WebSocket_|*none*|
 
 All currency pairs are supported.
 
@@ -258,7 +258,7 @@ ws sandbox: [websocket.org](https://www.websocket.org/echo.html)
 
 Added Hello World bot and Scaling bot.
 
-Added Binance, Kraken, KuCoin and BitMEX API.
+Added Binance, Kraken, KuCoin, Gate.io and BitMEX API.
 
 </details>
 

etc/K.sh.dist

@@ -49,7 +49,7 @@ OPTIONAL_ARGUMENTS="--colors --naked --debug-wallet"
 #API_EXCHANGE=KUCOIN
 #API_EXCHANGE=BITFINEX
 #API_EXCHANGE=ETHFINEX
-#API_EXCHANGE=GATEIO (under development)
+#API_EXCHANGE=GATEIO
 #API_EXCHANGE=HITBTC
 #API_EXCHANGE=BEQUANT
 #API_EXCHANGE=POLONIEX

src/bin/trading-bot/trading-bot.data.h

@@ -1501,7 +1501,7 @@ namespace tribeca {
         return sum;
       };
       void expire(multimap<Price, RecentTrade> *const k) {
-        Clock now = Tstamp;
+        const Clock now = Tstamp;
         for (auto it = k->begin(); it != k->end();)
           if (it->second.time + qp.tradeRateSeconds * 1e+3 > now) ++it;
           else it = k->erase(it);

src/lib/Krypto.ninja-apis.h

@@ -769,13 +769,15 @@ namespace ₿ {
           {    "reply", reply                                       }
         };
       };
-      json xfer(const string &url, const string &h1, const string &h2, const string &h3, const string &crud) const {
+      json xfer(const string &url, const string &h1, const string &h2, const string &h3, const string &post, const string &crud) const {
         return Curl::Web::xfer(url, [&](CURL *curl) {
           struct curl_slist *h_ = nullptr;
+          h_ = curl_slist_append(h_, "Content-Type: application/json");
           h_ = curl_slist_append(h_, ("KEY: "       + h1).data());
           h_ = curl_slist_append(h_, ("Timestamp: " + h2).data());
           h_ = curl_slist_append(h_, ("SIGN: "      + h3).data());
           curl_easy_setopt(curl, CURLOPT_HTTPHEADER, h_);
+          curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post.data());
           curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, crud.data());
         });
       };