cryptoHermes/internal/repo/webapi/binance/client.go

package binance

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"time"

	"cryptoHermes/pkg/httpclient"
)

const sourceName = "binance"

type Client struct {
	http   *httpclient.Client
	source string
}

type ClientOptions struct {
	BaseURL    string
	Timeout    time.Duration
	RetryCount int
	RPS        float64
	Burst      int
}

func NewClient(opts ClientOptions) *Client {
	return &Client{
		http: httpclient.New(httpclient.Options{
			BaseURL:    opts.BaseURL,
			Timeout:    opts.Timeout,
			RetryCount: opts.RetryCount,
			RPS:        opts.RPS,
			Burst:      opts.Burst,
		}),
		source: sourceName,
	}
}

type ExternalAPIError struct {
	Source     string
	Path       string
	StatusCode int
	Message    string
}

func (e *ExternalAPIError) Error() string {
	return fmt.Sprintf("%s %s status=%d: %s", e.Source, e.Path, e.StatusCode, e.Message)
}

func (c *Client) get(ctx context.Context, path string, q url.Values, out any) error {
	status, body, _, err := c.http.Do(ctx, httpclient.Request{
		Method: http.MethodGet,
		Path:   path,
		Query:  q,
	})
	if err != nil {
		return &ExternalAPIError{Source: c.source, Path: path, StatusCode: 0, Message: err.Error()}
	}
	if status >= 400 {
		return &ExternalAPIError{Source: c.source, Path: path, StatusCode: status, Message: string(body)}
	}
	if out == nil {
		return nil
	}
	if err := json.Unmarshal(body, out); err != nil {
		return &ExternalAPIError{Source: c.source, Path: path, StatusCode: status, Message: "decode: " + err.Error()}
	}
	return nil
}