Add nonce package for exchanges

exchanges/alphapoint/alphapoint.go

@@ -413,13 +413,17 @@ func (a *Alphapoint) SendAuthenticatedHTTPRequest(method, path string, data map[
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, a.Name)
 	}
 
+	if a.Nonce.Get() == 0 {
+		a.Nonce.Set(time.Now().UnixNano())
+	} else {
+		a.Nonce.Inc()
+	}
+
 	headers := make(map[string]string)
 	headers["Content-Type"] = "application/json"
 	data["apiKey"] = a.APIKey
-	nonce := time.Now().UnixNano()
-	nonceStr := strconv.FormatInt(nonce, 10)
-	data["apiNonce"] = nonce
-	hmac := common.GetHMAC(common.HashSHA256, []byte(nonceStr+a.ClientID+a.APIKey), []byte(a.APISecret))
+	data["apiNonce"] = a.Nonce.Get()
+	hmac := common.GetHMAC(common.HashSHA256, []byte(a.Nonce.String()+a.ClientID+a.APIKey), []byte(a.APISecret))
 	data["apiSig"] = common.StringToUpper(common.HexEncodeToString(hmac))
 	path = fmt.Sprintf("%s/ajax/v%s/%s", a.APIUrl, ALPHAPOINT_API_VERSION, path)
 	PayloadJSON, err := common.JSONEncode(data)

exchanges/anx/anx.go

@@ -290,8 +290,14 @@ func (a *ANX) SendAuthenticatedHTTPRequest(path string, params map[string]interf
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, a.Name)
 	}
 
+	if a.Nonce.Get() == 0 {
+		a.Nonce.Set(time.Now().UnixNano())
+	} else {
+		a.Nonce.Inc()
+	}
+
 	request := make(map[string]interface{})
-	request["nonce"] = strconv.FormatInt(time.Now().UnixNano(), 10)[0:13]
+	request["nonce"] = a.Nonce.String()[0:13]
 	path = fmt.Sprintf("api/%s/%s", ANX_API_VERSION, path)
 
 	if params != nil {
@@ -300,23 +306,23 @@ func (a *ANX) SendAuthenticatedHTTPRequest(path string, params map[string]interf
 		}
 	}
 
-	PayloadJson, err := common.JSONEncode(request)
+	PayloadJSON, err := common.JSONEncode(request)
 
 	if err != nil {
 		return errors.New("SendAuthenticatedHTTPRequest: Unable to JSON request")
 	}
 
 	if a.Verbose {
-		log.Printf("Request JSON: %s\n", PayloadJson)
+		log.Printf("Request JSON: %s\n", PayloadJSON)
 	}
 
-	hmac := common.GetHMAC(common.HashSHA512, []byte(path+string("\x00")+string(PayloadJson)), []byte(a.APISecret))
+	hmac := common.GetHMAC(common.HashSHA512, []byte(path+string("\x00")+string(PayloadJSON)), []byte(a.APISecret))
 	headers := make(map[string]string)
 	headers["Rest-Key"] = a.APIKey
 	headers["Rest-Sign"] = common.Base64Encode([]byte(hmac))
 	headers["Content-Type"] = "application/json"
 
-	resp, err := common.SendHTTPRequest("POST", ANX_API_URL+path, headers, bytes.NewBuffer(PayloadJson))
+	resp, err := common.SendHTTPRequest("POST", ANX_API_URL+path, headers, bytes.NewBuffer(PayloadJSON))
 
 	if a.Verbose {
 		log.Printf("Received raw: \n%s\n", resp)

exchanges/bitfinex/bitfinex.go

@@ -593,9 +593,15 @@ func (b *Bitfinex) SendAuthenticatedHTTPRequest(method, path string, params map[
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().UnixNano())
+	} else {
+		b.Nonce.Inc()
+	}
+
 	request := make(map[string]interface{})
 	request["request"] = fmt.Sprintf("/v%s/%s", BITFINEX_API_VERSION, path)
-	request["nonce"] = strconv.FormatInt(time.Now().UnixNano(), 10)
+	request["nonce"] = b.Nonce.String()
 
 	if params != nil {
 		for key, value := range params {
@@ -603,16 +609,16 @@ func (b *Bitfinex) SendAuthenticatedHTTPRequest(method, path string, params map[
 		}
 	}
 
-	PayloadJson, err := common.JSONEncode(request)
+	PayloadJSON, err := common.JSONEncode(request)
 	if err != nil {
 		return errors.New("SendAuthenticatedHTTPRequest: Unable to JSON request")
 	}
 
 	if b.Verbose {
-		log.Printf("Request JSON: %s\n", PayloadJson)
+		log.Printf("Request JSON: %s\n", PayloadJSON)
 	}
 
-	PayloadBase64 := common.Base64Encode(PayloadJson)
+	PayloadBase64 := common.Base64Encode(PayloadJSON)
 	hmac := common.GetHMAC(common.HashSHA512_384, []byte(PayloadBase64), []byte(b.APISecret))
 	headers := make(map[string]string)
 	headers["X-BFX-APIKEY"] = b.APIKey

exchanges/bitstamp/bitstamp.go

@@ -472,15 +472,19 @@ func (b *Bitstamp) SendAuthenticatedHTTPRequest(path string, v2 bool, values url
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().UnixNano())
+	} else {
+		b.Nonce.Inc()
+	}
 
 	if values == nil {
 		values = url.Values{}
 	}
 
 	values.Set("key", b.APIKey)
-	values.Set("nonce", nonce)
-	hmac := common.GetHMAC(common.HashSHA256, []byte(nonce+b.ClientID+b.APIKey), []byte(b.APISecret))
+	values.Set("nonce", b.Nonce.String())
+	hmac := common.GetHMAC(common.HashSHA256, []byte(b.Nonce.String()+b.ClientID+b.APIKey), []byte(b.APISecret))
 	values.Set("signature", common.StringToUpper(common.HexEncodeToString(hmac)))
 
 	if v2 {

exchanges/bittrex/bittrex.go

@@ -318,10 +318,14 @@ func (b *Bittrex) SendAuthenticatedHTTPRequest(path string, values url.Values, r
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().UnixNano())
+	} else {
+		b.Nonce.Inc()
+	}
 	values.Set("apikey", b.APIKey)
 	values.Set("apisecret", b.APISecret)
-	values.Set("nonce", nonce)
+	values.Set("nonce", b.Nonce.String())
 	rawQuery := path + "?" + values.Encode()
 	hmac := common.GetHMAC(
 		common.HashSHA512, []byte(rawQuery), []byte(b.APISecret),

exchanges/btcc/btcc.go

@@ -520,8 +520,12 @@ func (b *BTCC) SendAuthenticatedHTTPRequest(method string, params []interface{})
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)[0:16]
-	encoded := fmt.Sprintf("tonce=%s&accesskey=%s&requestmethod=post&id=%d&method=%s&params=", nonce, b.APIKey, 1, method)
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().UnixNano())
+	} else {
+		b.Nonce.Inc()
+	}
+	encoded := fmt.Sprintf("tonce=%s&accesskey=%s&requestmethod=post&id=%d&method=%s&params=", b.Nonce.String()[0:16], b.APIKey, 1, method)
 
 	if len(params) == 0 {
 		params = make([]interface{}, 0)
@@ -581,7 +585,7 @@ func (b *BTCC) SendAuthenticatedHTTPRequest(method string, params []interface{})
 	headers := make(map[string]string)
 	headers["Content-type"] = "application/json-rpc"
 	headers["Authorization"] = "Basic " + common.Base64Encode([]byte(b.APIKey+":"+common.HexEncodeToString(hmac)))
-	headers["Json-Rpc-Tonce"] = nonce
+	headers["Json-Rpc-Tonce"] = b.Nonce.String()
 
 	resp, err := common.SendHTTPRequest("POST", apiURL, headers, strings.NewReader(string(data)))
 

exchanges/btce/btce.go

@@ -297,8 +297,12 @@ func (b *BTCE) SendAuthenticatedHTTPRequest(method string, values url.Values, re
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().Unix(), 10)
-	values.Set("nonce", nonce)
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().Unix())
+	} else {
+		b.Nonce.Inc()
+	}
+	values.Set("nonce", b.Nonce.String())
 	values.Set("method", method)
 
 	encoded := values.Encode()

exchanges/btcmarkets/btcmarkets.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"log"
 	"net/url"
-	"strconv"
 	"time"
 
 	"github.com/thrasher-/gocryptotrader/common"
@@ -285,7 +284,11 @@ func (b *BTCMarkets) SendAuthenticatedRequest(reqType, path string, data interfa
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, b.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)[0:13]
+	if b.Nonce.Get() == 0 {
+		b.Nonce.Set(time.Now().UnixNano())
+	} else {
+		b.Nonce.Inc()
+	}
 	request := ""
 	payload := []byte("")
 
@@ -294,9 +297,9 @@ func (b *BTCMarkets) SendAuthenticatedRequest(reqType, path string, data interfa
 		if err != nil {
 			return err
 		}
-		request = path + "\n" + nonce + "\n" + string(payload)
+		request = path + "\n" + b.Nonce.String()[0:13] + "\n" + string(payload)
 	} else {
-		request = path + "\n" + nonce + "\n"
+		request = path + "\n" + b.Nonce.String()[0:13] + "\n"
 	}
 
 	hmac := common.GetHMAC(common.HashSHA512, []byte(request), []byte(b.APISecret))
@@ -310,7 +313,7 @@ func (b *BTCMarkets) SendAuthenticatedRequest(reqType, path string, data interfa
 	headers["Accept-Charset"] = "UTF-8"
 	headers["Content-Type"] = "application/json"
 	headers["apikey"] = b.APIKey
-	headers["timestamp"] = nonce
+	headers["timestamp"] = b.Nonce.String()[0:13]
 	headers["signature"] = common.Base64Encode(hmac)
 
 	resp, err := common.SendHTTPRequest(reqType, BTCMARKETS_API_URL+path, headers, bytes.NewBuffer(payload))

exchanges/coinut/coinut.go

@@ -276,13 +276,17 @@ func (c *COINUT) SendAuthenticatedHTTPRequest(apiRequest string, params map[stri
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, c.Name)
 	}
 
-	timestamp := time.Now().Unix()
+	if c.Nonce.Get() == 0 {
+		c.Nonce.Set(time.Now().Unix())
+	} else {
+		c.Nonce.Inc()
+	}
 	payload := []byte("")
 
 	if params == nil {
 		params = map[string]interface{}{}
 	}
-	params["nonce"] = timestamp
+	params["nonce"] = c.Nonce.Get()
 	params["request"] = apiRequest
 
 	payload, err = common.JSONEncode(params)

exchanges/exchange.go

@@ -7,6 +7,7 @@ import (
 	"github.com/thrasher-/gocryptotrader/common"
 	"github.com/thrasher-/gocryptotrader/config"
 	"github.com/thrasher-/gocryptotrader/currency/pair"
+	"github.com/thrasher-/gocryptotrader/exchanges/nonce"
 	"github.com/thrasher-/gocryptotrader/exchanges/orderbook"
 	"github.com/thrasher-/gocryptotrader/exchanges/ticker"
 )
@@ -43,6 +44,7 @@ type Base struct {
 	RESTPollingDelay            time.Duration
 	AuthenticatedAPISupport     bool
 	APISecret, APIKey, ClientID string
+	Nonce                       nonce.Nonce
 	TakerFee, MakerFee, Fee     float64
 	BaseCurrencies              []string
 	AvailablePairs              []string

exchanges/gdax/gdax.go

@@ -374,7 +374,12 @@ func (g *GDAX) SendAuthenticatedHTTPRequest(method, path string, params map[stri
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, g.Name)
 	}
 
-	timestamp := strconv.FormatInt(time.Now().Unix(), 10)
+	if g.Nonce.Get() == 0 {
+		g.Nonce.Set(time.Now().Unix())
+	} else {
+		g.Nonce.Inc()
+	}
+
 	payload := []byte("")
 
 	if params != nil {
@@ -389,11 +394,11 @@ func (g *GDAX) SendAuthenticatedHTTPRequest(method, path string, params map[stri
 		}
 	}
 
-	message := timestamp + method + "/" + path + string(payload)
+	message := g.Nonce.String() + method + "/" + path + string(payload)
 	hmac := common.GetHMAC(common.HashSHA256, []byte(message), []byte(g.APISecret))
 	headers := make(map[string]string)
 	headers["CB-ACCESS-SIGN"] = common.Base64Encode([]byte(hmac))
-	headers["CB-ACCESS-TIMESTAMP"] = timestamp
+	headers["CB-ACCESS-TIMESTAMP"] = g.Nonce.String()
 	headers["CB-ACCESS-KEY"] = g.APIKey
 	headers["CB-ACCESS-PASSPHRASE"] = g.ClientID
 	headers["Content-Type"] = "application/json"

exchanges/gemini/gemini.go

@@ -249,9 +249,15 @@ func (g *Gemini) SendAuthenticatedHTTPRequest(method, path string, params map[st
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, g.Name)
 	}
 
+	if g.Nonce.Get() == 0 {
+		g.Nonce.Set(time.Now().UnixNano())
+	} else {
+		g.Nonce.Inc()
+	}
+
 	request := make(map[string]interface{})
 	request["request"] = fmt.Sprintf("/v%s/%s", GEMINI_API_VERSION, path)
-	request["nonce"] = time.Now().UnixNano()
+	request["nonce"] = g.Nonce.Get()
 
 	if params != nil {
 		for key, value := range params {
@@ -259,17 +265,17 @@ func (g *Gemini) SendAuthenticatedHTTPRequest(method, path string, params map[st
 		}
 	}
 
-	PayloadJson, err := common.JSONEncode(request)
+	PayloadJSON, err := common.JSONEncode(request)
 
 	if err != nil {
 		return errors.New("SendAuthenticatedHTTPRequest: Unable to JSON request")
 	}
 
 	if g.Verbose {
-		log.Printf("Request JSON: %s\n", PayloadJson)
+		log.Printf("Request JSON: %s\n", PayloadJSON)
 	}
 
-	PayloadBase64 := common.Base64Encode(PayloadJson)
+	PayloadBase64 := common.Base64Encode(PayloadJSON)
 	hmac := common.GetHMAC(common.HashSHA512_384, []byte(PayloadBase64), []byte(g.APISecret))
 	headers := make(map[string]string)
 	headers["X-GEMINI-APIKEY"] = g.APIKey

exchanges/itbit/itbit.go

@@ -231,14 +231,12 @@ func (i *ItBit) SendAuthenticatedHTTPRequest(method string, path string, params
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, i.Name)
 	}
 
-	timestamp := strconv.FormatInt(time.Now().UnixNano(), 10)[0:13]
-	nonce, err := strconv.Atoi(timestamp)
-
-	if err != nil {
-		return err
+	if i.Nonce.Get() == 0 {
+		i.Nonce.Set(time.Now().UnixNano())
+	} else {
+		i.Nonce.Inc()
 	}
 
-	nonce--
 	request := make(map[string]interface{})
 	url := ITBIT_API_URL + path
 
@@ -262,21 +260,20 @@ func (i *ItBit) SendAuthenticatedHTTPRequest(method string, path string, params
 		}
 	}
 
-	nonceStr := strconv.Itoa(nonce)
-	message, err := common.JSONEncode([]string{method, url, string(PayloadJSON), nonceStr, timestamp})
+	message, err := common.JSONEncode([]string{method, url, string(PayloadJSON), i.Nonce.String(), i.Nonce.String()[0:13]})
 	if err != nil {
 		log.Println(err)
 		return
 	}
 
-	hash := common.GetSHA256([]byte(nonceStr + string(message)))
+	hash := common.GetSHA256([]byte(i.Nonce.String() + string(message)))
 	hmac := common.GetHMAC(common.HashSHA512, []byte(url+string(hash)), []byte(i.APISecret))
 	signature := common.Base64Encode(hmac)
 
 	headers := make(map[string]string)
 	headers["Authorization"] = i.ClientID + ":" + signature
-	headers["X-Auth-Timestamp"] = timestamp
-	headers["X-Auth-Nonce"] = nonceStr
+	headers["X-Auth-Timestamp"] = i.Nonce.String()[0:13]
+	headers["X-Auth-Nonce"] = i.Nonce.String()
 	headers["Content-Type"] = "application/json"
 
 	resp, err := common.SendHTTPRequest(method, url, headers, bytes.NewBuffer([]byte(PayloadJSON)))

exchanges/kraken/kraken.go

@@ -514,7 +514,13 @@ func (k *Kraken) SendAuthenticatedHTTPRequest(method string, values url.Values)
 	}
 
 	path := fmt.Sprintf("/%s/private/%s", KRAKEN_API_VERSION, method)
-	values.Set("nonce", strconv.FormatInt(time.Now().UnixNano(), 10))
+	if k.Nonce.Get() == 0 {
+		k.Nonce.Set(time.Now().UnixNano())
+	} else {
+		k.Nonce.Inc()
+	}
+
+	values.Set("nonce", k.Nonce.String())
 	secret, err := common.Base64Decode(k.APISecret)
 
 	if err != nil {

exchanges/lakebtc/lakebtc.go

@@ -276,8 +276,13 @@ func (l *LakeBTC) SendAuthenticatedHTTPRequest(method, params string, result int
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, l.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)
-	req := fmt.Sprintf("tonce=%s&accesskey=%s&requestmethod=post&id=1&method=%s&params=%s", nonce, l.APIKey, method, params)
+	if l.Nonce.Get() == 0 {
+		l.Nonce.Set(time.Now().UnixNano())
+	} else {
+		l.Nonce.Inc()
+	}
+
+	req := fmt.Sprintf("tonce=%s&accesskey=%s&requestmethod=post&id=1&method=%s&params=%s", l.Nonce.String(), l.APIKey, method, params)
 	hmac := common.GetHMAC(common.HashSHA1, []byte(req), []byte(l.APISecret))
 
 	if l.Verbose {
@@ -295,7 +300,7 @@ func (l *LakeBTC) SendAuthenticatedHTTPRequest(method, params string, result int
 	}
 
 	headers := make(map[string]string)
-	headers["Json-Rpc-Tonce"] = nonce
+	headers["Json-Rpc-Tonce"] = l.Nonce.String()
 	headers["Authorization"] = "Basic " + common.Base64Encode([]byte(l.APIKey+":"+common.HexEncodeToString(hmac)))
 	headers["Content-Type"] = "application/json-rpc"
 

exchanges/liqui/liqui.go

@@ -253,8 +253,12 @@ func (l *Liqui) SendAuthenticatedHTTPRequest(method string, values url.Values, r
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, l.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().Unix(), 10)
-	values.Set("nonce", nonce)
+	if l.Nonce.Get() == 0 {
+		l.Nonce.Set(time.Now().UnixNano())
+	} else {
+		l.Nonce.Inc()
+	}
+	values.Set("nonce", l.Nonce.String())
 	values.Set("method", method)
 
 	encoded := values.Encode()

exchanges/localbitcoins/localbitcoins.go

@@ -271,7 +271,12 @@ func (l *LocalBitcoins) SendAuthenticatedHTTPRequest(method, path string, values
 		return fmt.Errorf(exchange.WarningAuthenticatedRequestWithoutCredentialsSet, l.Name)
 	}
 
-	nonce := strconv.FormatInt(time.Now().UnixNano(), 10)
+	if l.Nonce.Get() == 0 {
+		l.Nonce.Set(time.Now().UnixNano())
+	} else {
+		l.Nonce.Inc()
+	}
+
 	payload := ""
 	path = "/api/" + path
 
@@ -279,11 +284,11 @@ func (l *LocalBitcoins) SendAuthenticatedHTTPRequest(method, path string, values
 		payload = values.Encode()
 	}
 
-	message := string(nonce) + l.APIKey + path + payload
+	message := l.Nonce.String() + l.APIKey + path + payload
 	hmac := common.GetHMAC(common.HashSHA256, []byte(message), []byte(l.APISecret))
 	headers := make(map[string]string)
 	headers["Apiauth-Key"] = l.APIKey
-	headers["Apiauth-Nonce"] = string(nonce)
+	headers["Apiauth-Nonce"] = l.Nonce.String()
 	headers["Apiauth-Signature"] = common.StringToUpper(common.HexEncodeToString(hmac))
 	headers["Content-Type"] = "application/x-www-form-urlencoded"
 

exchanges/nonce/nonce.go

@@ -0,0 +1,49 @@
+package nonce
+
+import (
+	"strconv"
+	"sync"
+)
+
+// Nonce struct holds the nonce value
+type Nonce struct {
+	n   int64
+	mtx sync.Mutex
+}
+
+// Inc increments the nonce value
+func (n *Nonce) Inc() {
+	n.mtx.Lock()
+	n.n++
+	n.mtx.Unlock()
+}
+
+// Get retrives the nonce value
+func (n *Nonce) Get() int64 {
+	n.mtx.Lock()
+	defer n.mtx.Unlock()
+	return n.n
+}
+
+// GetInc increments and returns the value of the nonce
+func (n *Nonce) GetInc() int64 {
+	n.mtx.Lock()
+	defer n.mtx.Unlock()
+	n.n++
+	return n.n
+}
+
+// Set sets the nonce value
+func (n *Nonce) Set(val int64) {
+	n.mtx.Lock()
+	n.n = val
+	n.mtx.Unlock()
+}
+
+// Returns a string version of the nonce
+func (n *Nonce) String() string {
+	n.mtx.Lock()
+	result := strconv.FormatInt(n.n, 10)
+	n.mtx.Unlock()
+	return result
+}

exchanges/nonce/nonce_test.go

@@ -0,0 +1,75 @@
+package nonce
+
+import (
+	"testing"
+	"time"
+)
+
+func TestInc(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(1)
+	nonce.Inc()
+	expected := int64(2)
+	result := nonce.Get()
+	if result != expected {
+		t.Errorf("Test failed. Expected %d got %d", expected, result)
+	}
+}
+
+func TestGet(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(112321313)
+	expected := int64(112321313)
+	result := nonce.Get()
+	if expected != result {
+		t.Errorf("Test failed. Expected %d got %d", expected, result)
+	}
+}
+
+func TestGetInc(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(1)
+	expected := int64(2)
+	result := nonce.GetInc()
+	if expected != result {
+		t.Errorf("Test failed. Expected %d got %d", expected, result)
+	}
+}
+
+func TestSet(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(1)
+	expected := int64(1)
+	result := nonce.Get()
+	if expected != result {
+		t.Errorf("Test failed. Expected %d got %d", expected, result)
+	}
+}
+
+func TestString(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(12312313131)
+	expected := "12312313131"
+	result := nonce.String()
+	if expected != result {
+		t.Errorf("Test failed. Expected %s got %s", expected, result)
+	}
+}
+
+func TestNonceConcurrency(t *testing.T) {
+	var nonce Nonce
+	nonce.Set(12312)
+
+	for i := 0; i < 1000; i++ {
+		go nonce.Inc()
+	}
+
+	// Allow sufficient time for all routines to finish
+	time.Sleep(time.Second)
+
+	result := nonce.Get()
+	expected := int64(12312 + 1000)
+	if expected != result {
+		t.Errorf("Test failed. Expected %d got %d", expected, result)
+	}
+}

exchanges/poloniex/poloniex.go

@@ -752,10 +752,12 @@ func (p *Poloniex) SendAuthenticatedHTTPRequest(method, endpoint string, values
 	headers["Content-Type"] = "application/x-www-form-urlencoded"
 	headers["Key"] = p.APIKey
 
-	nonce := time.Now().UnixNano()
-	nonceStr := strconv.FormatInt(nonce, 10)
-
-	values.Set("nonce", nonceStr)
+	if p.Nonce.Get() == 0 {
+		p.Nonce.Set(time.Now().UnixNano())
+	} else {
+		p.Nonce.Inc()
+	}
+	values.Set("nonce", p.Nonce.String())
 	values.Set("command", endpoint)
 
 	hmac := common.GetHMAC(common.HashSHA512, []byte(values.Encode()), []byte(p.APISecret))