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Add support for multiple simultaneous sessions. #13

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63 changes: 35 additions & 28 deletions bitstamp.go
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,6 @@ import (
"time"
)

var _cliId, _key, _secret string

var _url string = "https://www.bitstamp.net/api/v2"

type ErrorResult struct {
Expand Down Expand Up @@ -111,14 +109,23 @@ type OpenOrder struct {
CurrencyPair string `json:"currency_pair"`
}

func SetAuth(clientId, key, secret string) {
_cliId = clientId
_key = key
_secret = secret
// bitstamp holds credentials used to authorize private http calls
type Bitstamp struct {
clientId string
key string
secret string
}

func NewBitstamp(clientId, key, secret string) *Bitstamp {
return &Bitstamp{
clientId: clientId,
key: key,
secret: secret,
}
}

// privateQuery submits an http.Request with key, sig & nonce
func privateQuery(path string, values url.Values, v interface{}) error {
func (b Bitstamp) privateQuery(path string, values url.Values, v interface{}) error {
// parse the bitstamp URL
endpoint, err := url.Parse(_url)
if err != nil {
Expand All @@ -130,9 +137,9 @@ func privateQuery(path string, values url.Values, v interface{}) error {

// add required key, signature & nonce to values
nonce := strconv.FormatInt(time.Now().UnixNano(), 10)
mac := hmac.New(sha256.New, []byte(_secret))
mac.Write([]byte(nonce + _cliId + _key))
values.Set("key", _key)
mac := hmac.New(sha256.New, []byte(b.secret))
mac.Write([]byte(nonce + b.clientId + b.key))
values.Set("key", b.key)
values.Set("signature", strings.ToUpper(hex.EncodeToString(mac.Sum(nil))))
values.Set("nonce", nonce)

Expand Down Expand Up @@ -209,104 +216,104 @@ func (o *OrderBookItem) UnmarshalJSON(data []byte) error {
return nil
}

func AccountBalance() (*AccountBalanceResult, error) {
func (b Bitstamp) AccountBalance() (*AccountBalanceResult, error) {
balance := &AccountBalanceResult{}
err := privateQuery("/balance/", url.Values{}, balance)
err := b.privateQuery("/balance/", url.Values{}, balance)
if err != nil {
return nil, err
}
return balance, nil
}

func OrderBook(pair string) (*OrderBookResult, error) {
func (b Bitstamp) OrderBook(pair string) (*OrderBookResult, error) {
orderBook := &OrderBookResult{}
err := privateQuery("/order_book/"+pair+"/", url.Values{}, orderBook)
err := b.privateQuery("/order_book/"+pair+"/", url.Values{}, orderBook)
if err != nil {
return nil, err
}
return orderBook, nil
}

func Ticker(pair string) (*TickerResult, error) {
func (b Bitstamp) Ticker(pair string) (*TickerResult, error) {
ticker := &TickerResult{}
err := privateQuery("/ticker/"+pair+"/", url.Values{}, ticker)
err := b.privateQuery("/ticker/"+pair+"/", url.Values{}, ticker)
if err != nil {
return nil, err
}
return ticker, nil
}

func BuyLimitOrder(pair string, amount float64, price float64, amountPrecision, pricePrecision int) (*BuyOrderResult, error) {
func (b Bitstamp) BuyLimitOrder(pair string, amount float64, price float64, amountPrecision, pricePrecision int) (*BuyOrderResult, error) {
// set params
var v = url.Values{}
v.Add("amount", strconv.FormatFloat(amount, 'f', amountPrecision, 64))
v.Add("price", strconv.FormatFloat(price, 'f', pricePrecision, 64))

// make request
result := &BuyOrderResult{}
err := privateQuery("/buy/"+pair+"/", v, result)
err := b.privateQuery("/buy/"+pair+"/", v, result)
if err != nil {
return nil, err
}
return result, nil
}

func BuyMarketOrder(pair string, amount float64) (*BuyOrderResult, error) {
func (b Bitstamp) BuyMarketOrder(pair string, amount float64) (*BuyOrderResult, error) {
// set params
var v = url.Values{}
v.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))

// make request
result := &BuyOrderResult{}
err := privateQuery("/buy/market/"+pair+"/", v, result)
err := b.privateQuery("/buy/market/"+pair+"/", v, result)
if err != nil {
return nil, err
}
return result, nil
}

func SellLimitOrder(pair string, amount float64, price float64, amountPrecision, pricePrecision int) (*SellOrderResult, error) {
func (b Bitstamp) SellLimitOrder(pair string, amount float64, price float64, amountPrecision, pricePrecision int) (*SellOrderResult, error) {
// set params
var v = url.Values{}
v.Add("amount", strconv.FormatFloat(amount, 'f', amountPrecision, 64))
v.Add("price", strconv.FormatFloat(price, 'f', pricePrecision, 64))

// make request
result := &SellOrderResult{}
err := privateQuery("/sell/"+pair+"/", v, result)
err := b.privateQuery("/sell/"+pair+"/", v, result)
if err != nil {
return nil, err
}
return result, nil
}

func SellMarketOrder(pair string, amount float64) (*SellOrderResult, error) {
func (b Bitstamp) SellMarketOrder(pair string, amount float64) (*SellOrderResult, error) {
// set params
var v = url.Values{}
v.Add("amount", strconv.FormatFloat(amount, 'f', 8, 64))

// make request
result := &SellOrderResult{}
err := privateQuery("/sell/market/"+pair+"/", v, result)
err := b.privateQuery("/sell/market/"+pair+"/", v, result)
if err != nil {
return nil, err
}
return result, nil
}

func CancelOrder(orderId int64) {
func (b Bitstamp) CancelOrder(orderId int64) {
// set params
var v = url.Values{}
v.Add("id", strconv.FormatInt(orderId, 10))

// make request
privateQuery("/cancel_order/", v, nil)
b.privateQuery("/cancel_order/", v, nil)
}

func OpenOrders() (*[]OpenOrder, error) {
func (b Bitstamp) OpenOrders() (*[]OpenOrder, error) {
// make request
result := &[]OpenOrder{}
err := privateQuery("/open_orders/all/", url.Values{}, result)
err := b.privateQuery("/open_orders/all/", url.Values{}, result)
if err != nil {
return nil, err
}
Expand Down