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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package chainquery | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "time" | ||
|
|
||
| "github.com/friendsofgo/errors" | ||
| ) | ||
|
|
||
| const ( | ||
| apiUrl = "https://chainquery.odysee.tv/api/sql" | ||
| queryTimeout = 15 * time.Second | ||
| ) | ||
|
|
||
| type HttpDoer interface { | ||
| Do(*http.Request) (*http.Response, error) | ||
| } | ||
|
|
||
| type HeightResponse struct { | ||
| Success bool `json:"success"` | ||
| Error *string `json:"error"` | ||
| Data []HeightData `json:"data"` | ||
| } | ||
|
|
||
| type HeightData struct { | ||
| Height int `json:"height"` | ||
| } | ||
|
|
||
| var client HttpDoer = &http.Client{ | ||
| Timeout: queryTimeout, | ||
| } | ||
|
|
||
| func GetHeight() (int, error) { | ||
| r := HeightResponse{} | ||
| err := makeRequest(client, "select height from block order by id desc limit 1", &r) | ||
| if err != nil { | ||
| return 0, errors.Wrap(err, "error retrieving latest height") | ||
| } | ||
| if len(r.Data) != 1 { | ||
| return 0, errors.Errorf("error retrieving latest height, expected %v items in response, got %v", 1, len(r.Data)) | ||
| } | ||
| return r.Data[0].Height, nil | ||
| } | ||
|
|
||
| func makeRequest(client HttpDoer, query string, target any) error { | ||
| baseUrl, err := url.Parse(apiUrl) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| params := url.Values{} | ||
| params.Add("query", query) | ||
| baseUrl.RawQuery = params.Encode() | ||
|
|
||
| req, err := http.NewRequest(http.MethodGet, baseUrl.String(), nil) | ||
| if err != nil { | ||
| return fmt.Errorf("error creating request: %w", err) | ||
| } | ||
|
|
||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("error sending request: %w", err) | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| body, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return fmt.Errorf("error reading response: %w", err) | ||
| } | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return fmt.Errorf("unexpected status code: got %v, want %v", resp.StatusCode, http.StatusOK) | ||
| } | ||
|
|
||
| err = json.Unmarshal(body, target) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
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