2524_modified_rate_limiter

lib/binance/binance_client.go

@@ -61,6 +61,16 @@ func NewBinance(apiKey, secretKey string, sugar *zap.SugaredLogger, options ...O
 	return clnt
 }
 
+//waitN mimic the leaky bucket algorithm to wait for n drop
+func (bc *Client) waitN(n int) error {
+	for i := 0; i < n; i++ {
+		if err := bc.rateLimiter.WaitN(context.Background(), 1); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func (bc *Client) fillRequest(req *http.Request, signNeeded bool, timepoint time.Time) error {
 	if req.Method == http.MethodPost || req.Method == http.MethodPut || req.Method == http.MethodDelete {
 		req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
@@ -163,7 +173,7 @@ func (bc *Client) GetTradeHistory(symbol string, fromID int64) ([]TradeHistory,
 	)
 	const weight = 5
 	//Wait before creating the request to avoid timestamp request outside the recWindow
-	if err := bc.rateLimiter.WaitN(context.Background(), weight); err != nil {
+	if err := bc.waitN(weight); err != nil {
 		return result, err
 	}
 
@@ -192,7 +202,7 @@ func (bc *Client) GetAssetDetail() (AssetDetailResponse, error) {
 	)
 	const weight = 1
 	//Wait before creating the request to avoid timestamp request outside the recWindow
-	if err := bc.rateLimiter.WaitN(context.Background(), weight); err != nil {
+	if err := bc.waitN(weight); err != nil {
 		return result, err
 	}
 
@@ -218,7 +228,7 @@ func (bc *Client) GetWithdrawalHistory(fromTime, toTime time.Time) (WithdrawHist
 	)
 	const weight = 1
 	//Wait before creating the request to avoid timestamp request outside the recWindow
-	if err := bc.rateLimiter.WaitN(context.Background(), weight); err != nil {
+	if err := bc.waitN(weight); err != nil {
 		return result, err
 	}
 

lib/binance/binance_client_test.go

@@ -2,12 +2,15 @@ package binance
 
 import (
 	"os"
+	"sync"
 	"testing"
 	"time"
 
 	"github.com/KyberNetwork/reserve-stats/lib/testutil"
+
 	"github.com/stretchr/testify/assert"
 	"go.uber.org/zap"
+	"golang.org/x/time/rate"
 )
 
 func TestBinanceClient(t *testing.T) {
@@ -44,3 +47,45 @@ func TestBinanceClient(t *testing.T) {
 	_, err = binanceClient.GetWithdrawalHistory(fromTime, toTime)
 	assert.NoError(t, err, "binance client get withdraw history error: %s", err)
 }
+
+func TestBinanceClientWithLimiter(t *testing.T) {
+	//Uncomment the skip to run the test in dev mode.
+	//Alter these number to test binance's behaviour
+	t.Skip()
+	var (
+		rps     = 20.0
+		limiter = rate.NewLimiter(rate.Limit(rps), 1)
+		wg      = &sync.WaitGroup{}
+	)
+	logger, err := zap.NewDevelopment()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer logger.Sync()
+	sugar := logger.Sugar()
+
+	binanceAPIKey, ok := os.LookupEnv("BINANCE_API_KEY")
+	if !ok {
+		t.Skip("Binance API key is not available")
+	}
+
+	binanceSecretKey, ok := os.LookupEnv("BINANCE_SECRET_KEY")
+	if !ok {
+		t.Skip("Binance secret key is not available")
+	}
+
+	binanceClient := NewBinance(binanceAPIKey, binanceSecretKey, sugar, WithRateLimiter(limiter))
+
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			_, err = binanceClient.GetTradeHistory("KNCETH", 0)
+			if err != nil {
+				panic(err)
+			}
+			assert.NoError(t, err, "binance client get trade history error: %s", err)
+		}(i)
+	}
+	wg.Wait()
+}

lib/etherscan/etherscan_client_test.go

@@ -47,7 +47,7 @@ func TestEtherScanClientWithRateLimiter(t *testing.T) {
 	//at rps =6 etherscan will return 403 for some requests.
 	t.Skip()
 	var (
-		rps = 6
+		rps = 5
 		wg  = &sync.WaitGroup{}
 	)
 	logger, err := zap.NewDevelopment()
@@ -72,6 +72,7 @@ func TestEtherScanClientWithRateLimiter(t *testing.T) {
 			defer wg.Done()
 			_, err := etherscanClient.EtherTotalSupply()
 			sugar.Debugw("finshed a request", "request_number", index, "finish_time", time.Now(), "error", err)
+			assert.NoError(t, err, fmt.Sprintf("got error: %v", err))
 		}(i)
 	}
 	wg.Wait()

lib/etherscan/flags.go

@@ -53,7 +53,7 @@ func NewEtherscanClientFromContext(c *cli.Context) (*etherscan.Client, error) {
 	if rps <= 0 {
 		return nil, errors.New("rate limit must be more than 0")
 	}
-
+	//Etherscan doesn't  allow burst,  i.e: 5 request per second  really mean 1 request per 0.2  second
 	limiter := rate.NewLimiter(rate.Limit(rps), 1)
 	client.BeforeRequest = limitRate(limiter)
 	return client, nil

lib/huobi/flags.go

@@ -30,9 +30,9 @@ func NewCliFlags() []cli.Flag {
 		},
 		cli.Float64Flag{
 			Name:   huobiRequestPerSecond,
-			Usage:  "huobi request limit per second, default to 10 which huobi's normal rate limit (100 request per 10 sec)",
+			Usage:  "huobi request limit per second, default to 8 which huobi's tested rate limit",
 			EnvVar: "HUOBI_REQUESTS_PER_SECOND",
-			Value:  10,
+			Value:  8,
 		},
 	}
 }

lib/huobi/huobi_client_test.go

@@ -3,13 +3,15 @@ package huobi
 import (
 	"fmt"
 	"os"
+	"sync"
 	"testing"
 	"time"
 
+	"github.com/KyberNetwork/reserve-stats/lib/testutil"
+
 	"github.com/stretchr/testify/assert"
 	"go.uber.org/zap"
-
-	"github.com/KyberNetwork/reserve-stats/lib/testutil"
+	"golang.org/x/time/rate"
 )
 
 func TestHuobiClient(t *testing.T) {
@@ -45,3 +47,46 @@ func TestHuobiClient(t *testing.T) {
 	_, err = huobiClient.GetWithdrawHistory("ETH", 0)
 	assert.NoError(t, err)
 }
+
+func TestHuobiClientWithLimiter(t *testing.T) {
+	//Uncomment the skip to run the test in dev mode.
+	//Alter these number to test huobi's behaviour
+	t.Skip()
+	var (
+		rps       = 8.0
+		limiter   = rate.NewLimiter(rate.Limit(rps), 1)
+		wg        = &sync.WaitGroup{}
+		startDate = time.Date(2018, time.January, 1, 0, 0, 0, 0, time.UTC)
+		endDate   = time.Date(2019, time.February, 1, 0, 0, 0, 0, time.UTC)
+	)
+	logger, err := zap.NewDevelopment()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer logger.Sync()
+	sugar := logger.Sugar()
+
+	huobiAPIKey, ok := os.LookupEnv("HUOBI_API_KEY")
+	if !ok {
+		t.Skip("Huobi API key is not available")
+	}
+
+	huobiSecretKey, ok := os.LookupEnv("HUOBI_SECRET_KEY")
+	if !ok {
+		t.Skip("Huobi secret key is not available")
+	}
+
+	huobiClient := NewClient(huobiAPIKey, huobiSecretKey, sugar, WithRateLimiter(limiter))
+
+	assert.NoError(t, err, fmt.Sprintf("get history error: %v", err))
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			_, err = huobiClient.GetTradeHistory("bixeth", startDate, endDate)
+			sugar.Debugw("done request", "number", i, "at time", time.Now(), "Err ", err)
+			assert.NoError(t, err)
+		}(i)
+	}
+	wg.Wait()
+}