From 3e04c98cf64ac4c3d36122a04e8f0bcaa756d193 Mon Sep 17 00:00:00 2001
From: Adrian Gallagher <thrasher@addictionsoftware.com>
Date: Tue, 25 Nov 2014 18:50:31 +1100
Subject: [PATCH] Added support for LakeBTC exchange.

---
 lakebtchttp.go | 175 +++++++++++++++++++++++++++++++++++++++++++++++++
 main.go        |   8 ++-
 2 files changed, 182 insertions(+), 1 deletion(-)
 create mode 100644 lakebtchttp.go

diff --git a/lakebtchttp.go b/lakebtchttp.go
new file mode 100644
index 00000000..d263e01e
--- /dev/null
+++ b/lakebtchttp.go
@@ -0,0 +1,175 @@
+package main
+
+import (
+	"net/http"
+	"net/url"
+	"strconv"
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"errors"
+	"strings"
+	"time"
+	"io/ioutil"
+	"fmt"
+)
+
+const (
+	LAKEBTC_API_URL = "https://www.LakeBTC.com/api_v1/"
+	LAKEBTC_TICKER = "ticker"
+	LAKEBTC_ORDERBOOK = "bcorderbook"
+	LAKEBTC_ORDERBOOK_CNY = "bcorderbook_cny"
+	LAKEBTC_TRADES = "bctrades"
+	LAKEBTC_GET_ACCOUNT_INFO = "getAccountInfo"
+	LAKEBTC_BUY_ORDER = "buyOrder"
+	LAKEBTC_SELL_ORDER = "sellOrder"
+	LAKEBTC_GET_ORDERS = "getOrders"
+	LAKEBTC_CANCEL_ORDER = "cancelOrder"
+	LAKEBTC_GET_TRADES = "getTrades"
+)
+
+type LakeBTC struct {
+	Email, APISecret string
+}
+
+type LakeBTCTicker struct {
+	Last float64
+	Bid float64
+	Ask float64
+	High float64
+	Low float64
+}
+
+type LakeBTCTickerResponse struct {
+	USD LakeBTCTicker
+	CNY LakeBTCTicker
+}
+
+func (l *LakeBTC) GetTicker() (LakeBTCTickerResponse) {
+	response := LakeBTCTickerResponse{}
+	err := SendHTTPRequest(LAKEBTC_API_URL + LAKEBTC_TICKER, true, &response)
+	if err != nil {
+		fmt.Println(err)
+		return response
+	}
+	return response
+}
+
+func (l *LakeBTC) GetOrderBook(currency string) (bool) {
+	req := LAKEBTC_ORDERBOOK
+	if currency == "CNY" {
+		req = LAKEBTC_ORDERBOOK_CNY
+	}
+
+	err := SendHTTPRequest(LAKEBTC_API_URL + req, true, nil)
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+	return true
+}
+
+func (l *LakeBTC) GetTradeHistory() (bool) {
+	err := SendHTTPRequest(LAKEBTC_API_URL + LAKEBTC_TRADES, true, nil)
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+	return true
+}
+
+func (l *LakeBTC) GetAccountInfo() {
+	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_ACCOUNT_INFO, "")
+
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func (l *LakeBTC) Trade(orderType int, amount, price float64, currency string) {
+	params := strconv.FormatFloat(price, 'f', 8, 64) + "," + strconv.FormatFloat(amount, 'f', 8, 64) + "," + currency
+	err := errors.New("")
+
+	if orderType == 0 {
+		err = l.SendAuthenticatedHTTPRequest(LAKEBTC_BUY_ORDER, params)
+	} else {
+		err = l.SendAuthenticatedHTTPRequest(LAKEBTC_SELL_ORDER, params)
+	}
+
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func (l *LakeBTC) GetOrders() {
+	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_ORDERS, "")
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func (l *LakeBTC) CancelOrder(orderID int64) {
+	params := strconv.FormatInt(orderID, 10)
+	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_CANCEL_ORDER, params)
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func (l *LakeBTC) GetTrades(timestamp time.Time) {
+	params := ""
+
+	if !timestamp.IsZero() {
+		params = strconv.FormatInt(timestamp.Unix(), 10)
+	}
+	
+	err := l.SendAuthenticatedHTTPRequest(LAKEBTC_GET_TRADES, params)
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func (l *LakeBTC) SendAuthenticatedHTTPRequest(method, params string) (err error) {
+	nonce := strconv.FormatInt(time.Now().Unix(), 10)
+	v := url.Values{}
+	v.Set("tnonce", nonce)
+	v.Set("accesskey", l.Email)
+	v.Set("requestmethod", "POST")
+	v.Set("id", nonce)
+	v.Set("method", method)
+	v.Set("params", params)
+
+	hmac := hmac.New(sha256.New, []byte(l.APISecret))
+	encoded := v.Encode()
+	hmac.Write([]byte(encoded))
+
+
+	fmt.Printf("Sending POST request to %s calling method %s with params %s\n", LAKEBTC_API_URL, method, encoded)
+	reqBody := strings.NewReader(encoded)
+	hash := hex.EncodeToString(hmac.Sum(nil))
+	b64 := base64.StdEncoding.EncodeToString([]byte(l.Email + ":" + hash))
+
+	req, err := http.NewRequest("POST", LAKEBTC_API_URL, reqBody)
+
+	if err != nil {
+		return err
+	}
+
+	req.Header.Add("Json-Rpc-Tonce", nonce)
+	req.Header.Add("Authorization: Basic", b64)
+	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+
+	if err != nil {
+		return errors.New("PostRequest: Unable to send request")
+	}
+
+	contents, _ := ioutil.ReadAll(resp.Body)
+	fmt.Printf("Recieved raw: %s\n", string(contents))
+	resp.Body.Close()
+	return nil
+
+}
\ No newline at end of file
diff --git a/main.go b/main.go
index 43b8c6da..5e1d79c7 100644
--- a/main.go
+++ b/main.go
@@ -15,6 +15,7 @@ type Exchange struct {
 	okcoinChina OKCoin
 	okcoinIntl OKCoin
 	itbit ItBit
+	lakebtc LakeBTC
 	huobi HUOBI
 }
 
@@ -29,9 +30,14 @@ func main() {
 		log.Fatalln(err)
 		return
 	}
-
+	
 	//temp until proper asynchronous method of getting pricing/order books is coded
 	for {
+		go func() {
+			LakeBTCTickerResponse := exchange.lakebtc.GetTicker()
+			log.Printf("LakeBTC USD: Last %f (%f) High %f (%f) Low %f (%f)\n", LakeBTCTickerResponse.USD.Last, LakeBTCTickerResponse.CNY.Last, LakeBTCTickerResponse.USD.High, LakeBTCTickerResponse.CNY.High, LakeBTCTickerResponse.USD.Low, LakeBTCTickerResponse.CNY.Low)
+		}()
+
 		go func() {
 			BTCChinaBTC := exchange.btcchina.GetTicker("btccny")
 			BTCChinaBTCLastUSD, _ := ConvertCurrency(BTCChinaBTC.Last, "CNY", "USD")