forked from f13end/cryptotrader
/
feed.go
70 lines (61 loc) · 2.04 KB
/
feed.go
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// The MIT License (MIT)
//
// Copyright (c) 2018 Cranky Kernel
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package gdax
import (
"github.com/gorilla/websocket"
)
const WS_FEED_URL = "wss://ws-feed.gdax.com"
type FeedClient struct {
conn *websocket.Conn
}
func NewFeedClient() *FeedClient {
client := &FeedClient{}
return client
}
func (c *FeedClient) Connect() (err error) {
c.conn, _, err = websocket.DefaultDialer.Dial(WS_FEED_URL, nil)
if err != nil {
return err
}
return nil
}
func (c *FeedClient) Subscribe(channels... interface{}) (error) {
message := map[string]interface{}{
"type": "subscribe",
"channels": channels,
}
return c.conn.WriteJSON(message)
}
// Next reads the next message into a generic map.
func (c *FeedClient) Next() (map[string]interface{}, error) {
var message map[string]interface{}
err := c.conn.ReadJSON(&message)
return message, err
}
func TickerChannel(products []string) map[string]interface{} {
return map[string]interface{}{
"name": "ticker",
"product_ids": products,
}
}