Cryptocurrency APIs

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package main
import (
    "fmt"
    websocket "github.com/gorilla/websocket"
)

const APIKEY = "YOUR_API_KEY"
const CHANNELS = "C.AUD/USD,C.USD/EUR,C.USD/JPY"

func main(){
    c, _, err := websocket.DefaultDialer.Dial("wss://socket.polygon.io/forex", nil )
    if err != nil {
        panic( err )
    }
    defer c.Close()
    c.WriteMessage( websocket.TextMessage, []byte( fmt.Sprintf("{\"action\":\"auth\",\"params\":\"%s\"}", APIKEY) ) )
    c.WriteMessage( websocket.TextMessage, []byte( fmt.Sprintf("{\"action\":\"subscribe\",\"params\":\"%s\"}", CHANNELS) ) )
    var msg interface{}
    for {
        err := c.ReadJSON( &msg ); if err != nil {
            panic( err )
        }
        fmt.Println( "Message:", msg )
    }
}