package cmdutil import ( "fmt" "os" "strings" "github.com/c9s/bbgo/pkg/exchange/binance" "github.com/c9s/bbgo/pkg/exchange/ftx" "github.com/c9s/bbgo/pkg/exchange/max" "github.com/c9s/bbgo/pkg/types" ) func NewExchangeStandard(n types.ExchangeName, key, secret, subAccount string) (types.Exchange, error) { switch n { case types.ExchangeFTX: return ftx.NewExchange(key, secret, subAccount), nil case types.ExchangeBinance: return binance.New(key, secret), nil case types.ExchangeMax: return max.New(key, secret), nil default: return nil, fmt.Errorf("unsupported exchange: %v", n) } } func NewExchangeWithEnvVarPrefix(n types.ExchangeName, varPrefix string) (types.Exchange, error) { if len(varPrefix) == 0 { varPrefix = n.String() } varPrefix = strings.ToUpper(varPrefix) key := os.Getenv(varPrefix + "_API_KEY") secret := os.Getenv(varPrefix + "_API_SECRET") if len(key) == 0 || len(secret) == 0 { return nil, fmt.Errorf("can not initialize exchange %s: empty key or secret, env var prefix: %s", n, varPrefix) } subAccount := os.Getenv(varPrefix + "_SUBACCOUNT") return NewExchangeStandard(n, key, secret, subAccount) } // NewExchange constructor exchange object from viper config. func NewExchange(n types.ExchangeName) (types.Exchange, error) { return NewExchangeWithEnvVarPrefix(n, "") }