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okex: implement base rest client
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parent
36071d6649
commit
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12
pkg/exchange/okex/exchange.go
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12
pkg/exchange/okex/exchange.go
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package okex
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import (
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"github.com/sirupsen/logrus"
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)
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var log = logrus.WithFields(logrus.Fields{
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"exchange": "okex",
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})
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type Exchange struct {
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}
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117
pkg/exchange/okex/okexapi/client.go
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117
pkg/exchange/okex/okexapi/client.go
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package okexapi
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import (
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"bytes"
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"net/http"
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"net/url"
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"strings"
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"time"
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"github.com/pkg/errors"
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)
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const RestBaseURL = "https://www.okex.com/"
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const PublicWebSocketURL = "wss://ws.okex.com:8443/ws/v5/public"
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const PrivateWebSocketURL = "wss://ws.okex.com:8443/ws/v5/private"
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type RestClient struct {
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BaseURL *url.URL
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Key, Secret, Passphrase string
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}
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func NewClient() *RestClient {
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u, err := url.Parse(RestBaseURL)
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if err != nil {
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panic(err)
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}
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return &RestClient{
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BaseURL: u,
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}
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}
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func (c *RestClient) Auth(key, secret, passphrase string) {
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c.Key = key
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c.Secret = secret
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c.Passphrase = passphrase
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}
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// NewRequest create new API request. Relative url can be provided in refURL.
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func (c *RestClient) newRequest(method, refURL string, params url.Values, body []byte) (*http.Request, error) {
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rel, err := url.Parse(refURL)
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if err != nil {
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return nil, err
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}
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if params != nil {
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rel.RawQuery = params.Encode()
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}
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pathURL := c.BaseURL.ResolveReference(rel)
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req, err := http.NewRequest(method, pathURL.String(), bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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return req, nil
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}
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// newAuthenticatedRequest creates new http request for authenticated routes.
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func (c *RestClient) newAuthenticatedRequest(method, refURL string, params url.Values) (*http.Request, error) {
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if len(c.Key) == 0 {
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return nil, errors.New("empty api key")
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}
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if len(c.Secret) == 0 {
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return nil, errors.New("empty api secret")
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}
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rel, err := url.Parse(refURL)
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if err != nil {
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return nil, err
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}
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if params != nil {
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rel.RawQuery = params.Encode()
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}
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pathURL := c.BaseURL.ResolveReference(rel)
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path := pathURL.Path
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// 2020-12-08T09:08:57.715Z
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t := time.Now()
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timestamp := t.Format("2006-01-02T15:04:05.999Z07:00")
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payload := timestamp + strings.ToUpper(method) + path
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sign := signPayload(payload, c.Secret)
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var body []byte
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req, err := http.NewRequest(method, pathURL.String(), bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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req.Header.Add("Content-Type", "application/json")
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req.Header.Add("Accept", "application/json")
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req.Header.Add("OK-ACCESS-KEY", c.Key)
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req.Header.Add("OK-ACCESS-SIGN", sign)
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req.Header.Add("OK-ACCESS-TIMESTAMP", timestamp)
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req.Header.Add("OK-ACCESS-PASSPHRASE", c.Passphrase)
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return req, nil
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}
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func signPayload(payload string, secret string) string {
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var sig = hmac.New(sha256.New, []byte(secret))
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_, err := sig.Write([]byte(payload))
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if err != nil {
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return ""
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}
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return base64.StdEncoding.EncodeToString(sig.Sum(nil))
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// return hex.EncodeToString(sig.Sum(nil))
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}
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