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37 lines
673 B
Go
37 lines
673 B
Go
package coinmarketcap
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import (
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"context"
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v1 "github.com/c9s/bbgo/pkg/datasource/coinmarketcap/v1"
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)
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type DataSource struct {
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client *v1.RestClient
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}
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func New(apiKey string) *DataSource {
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client := v1.New()
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client.Auth(apiKey)
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return &DataSource{client: client}
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}
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func (d *DataSource) QueryMarketCapInUSD(ctx context.Context, limit int) (map[string]float64, error) {
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req := v1.ListingsLatestRequest{
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Client: d.client,
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Limit: &limit,
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}
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resp, err := req.Do(ctx)
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if err != nil {
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return nil, err
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}
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marketcaps := make(map[string]float64)
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for _, data := range resp {
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marketcaps[data.Symbol] = data.Quote["USD"].MarketCap
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}
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return marketcaps, nil
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}
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