bbgo_origin/pkg/cmd/cmdutil/exchange.go

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package cmdutil
import (
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"fmt"
"os"
"strings"
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"github.com/pkg/errors"
"github.com/c9s/bbgo/pkg/exchange/binance"
"github.com/c9s/bbgo/pkg/exchange/max"
"github.com/c9s/bbgo/pkg/types"
)
func NewExchangeStandard(n types.ExchangeName, key, secret string) (types.Exchange, error) {
if len(key) == 0 || len(secret) == 0 {
return nil, errors.New("binance: empty key or secret")
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}
switch n {
case types.ExchangeBinance:
return binance.New(key, secret), nil
case types.ExchangeMax:
return max.New(key, secret), nil
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default:
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return nil, fmt.Errorf("unsupported exchange: %v", n)
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}
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}
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("%s: empty key or secret, env var prefix: %s", n, varPrefix)
}
return NewExchangeStandard(n, key, secret)
}
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// NewExchange constructor exchange object from viper config.
func NewExchange(n types.ExchangeName) (types.Exchange, error) {
return NewExchangeWithEnvVarPrefix(n, "")
}