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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,103 @@ | ||
package uploader | ||
|
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import ( | ||
"bytes" | ||
"encoding/json" | ||
"errors" | ||
"io" | ||
"mime/multipart" | ||
"net/http" | ||
"time" | ||
|
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"github.com/rs/zerolog/log" | ||
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"github.com/ChainSafe/sygma-relayer/config/relayer" | ||
"github.com/cenkalti/backoff/v4" | ||
) | ||
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type Uploader interface { | ||
Upload(proposals []map[string]interface{}) (string, error) | ||
} | ||
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type IPFSUploader struct { | ||
config relayer.UploaderConfig | ||
} | ||
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func NewIPFSUploader(config relayer.UploaderConfig) *IPFSUploader { | ||
return &IPFSUploader{config: config} | ||
} | ||
|
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type IPFSResponse struct { | ||
IpfsHash string `json:"IpfsHash"` | ||
} | ||
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func (i *IPFSUploader) Upload(dataToUpload []map[string]interface{}) (string, error) { | ||
jsonData, err := json.Marshal(dataToUpload) | ||
if err != nil { | ||
return "", err | ||
} | ||
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body := new(bytes.Buffer) | ||
writer := multipart.NewWriter(body) | ||
part, err := writer.CreateFormFile("file", "metadata.json") | ||
if err != nil { | ||
return "", err | ||
} | ||
_, err = part.Write(jsonData) | ||
if err != nil { | ||
return "", err | ||
} | ||
writer.Close() | ||
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req, err := http.NewRequest("POST", i.config.URL, body) | ||
if err != nil { | ||
return "", err | ||
} | ||
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req.Header.Add("Authorization", "Bearer "+i.config.AuthToken) | ||
req.Header.Add("Content-Type", writer.FormDataContentType()) | ||
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var ipfsResponse IPFSResponse | ||
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// Define the operation to be retried | ||
operation := func() error { | ||
return i.performRequest(req, &ipfsResponse) | ||
} | ||
expBackoff := backoff.NewExponentialBackOff() | ||
expBackoff.MaxElapsedTime = i.config.MaxElapsedTime | ||
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notify := func(err error, duration time.Duration) { | ||
log.Warn().Err(err).Msg("Unable to upload metadata to ipfs") | ||
} | ||
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err = backoff.RetryNotify(operation, backoff.WithMaxRetries(expBackoff, i.config.MaxRetries), notify) | ||
if err != nil { | ||
return "", err | ||
} | ||
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return ipfsResponse.IpfsHash, nil | ||
} | ||
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func (i *IPFSUploader) performRequest(req *http.Request, ipfsResponse *IPFSResponse) error { | ||
client := &http.Client{} | ||
resp, err := client.Do(req) | ||
if err != nil { | ||
return err | ||
} | ||
defer resp.Body.Close() | ||
|
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if resp.StatusCode != 200 { | ||
return errors.New("received non-200 status code") | ||
} | ||
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respBody, err := io.ReadAll(resp.Body) | ||
if err != nil { | ||
return err | ||
} | ||
|
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if err := json.Unmarshal(respBody, &ipfsResponse); err != nil { | ||
return err | ||
} | ||
|
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return nil | ||
} |
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