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Merge pull request #855 from forta-network/kisel/forta-1609-accept-js…
…on-rpc-cache-requests-from-bots JSON-RPC local cache for v2 bots optimizes a few popular json-rpc requests for 8 protocols: `eth_getBlockNumber`, `eth_getBlockByNumber`, `eth_getLogs` (for a specific block), `trace_block`. Blocks data arrives with a delay of 10-60.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package blocksdata | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "compress/gzip" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/url" | ||
| "time" | ||
|
|
||
| backoff "github.com/cenkalti/backoff/v4" | ||
| "github.com/forta-network/forta-core-go/protocol" | ||
| "github.com/forta-network/forta-core-go/utils/httpclient" | ||
| "google.golang.org/protobuf/proto" | ||
| ) | ||
|
|
||
| const ( | ||
| minBackoff = 1 * time.Second | ||
| maxBackoff = 10 * time.Second | ||
| maxElapsedTime = 5 * time.Minute | ||
| ) | ||
|
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| type blocksDataClient struct { | ||
| dispatcherURL *url.URL | ||
| } | ||
|
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| func NewBlocksDataClient(dispatcherURL string) *blocksDataClient { | ||
| u, _ := url.Parse(dispatcherURL) | ||
|
|
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| return &blocksDataClient{ | ||
| dispatcherURL: u, | ||
| } | ||
| } | ||
|
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| type PresignedURLItem struct { | ||
| Bucket int64 `json:"bucket"` | ||
| PresignedURL string `json:"presignedURL"` | ||
| ExpiresAt int64 `json:"expiresAt"` | ||
| } | ||
|
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| func (c *blocksDataClient) GetBlocksData(bucket int64) (_ *protocol.BlocksData, err error) { | ||
| dispatcherUrl, err := url.JoinPath(c.dispatcherURL.String(), fmt.Sprintf("%d", bucket)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| bo := backoff.NewExponentialBackOff() | ||
| bo.InitialInterval = minBackoff | ||
| bo.MaxInterval = maxBackoff | ||
| bo.MaxElapsedTime = maxElapsedTime | ||
|
|
||
| var item PresignedURLItem | ||
|
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| err = backoff.Retry(func() error { | ||
| resp, err := httpclient.Default.Get(dispatcherUrl) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| defer resp.Body.Close() | ||
|
|
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| b, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if resp.StatusCode == http.StatusForbidden { | ||
| return backoff.Permanent(fmt.Errorf("forbidden")) | ||
| } | ||
|
|
||
| if resp.StatusCode == http.StatusNotFound && bytes.Contains(b, []byte("too old")) { | ||
| return fmt.Errorf("%s", b) | ||
| } | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return fmt.Errorf("unexpected status code: %d, body: %s", resp.StatusCode, b) | ||
| } | ||
|
|
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| err = json.Unmarshal(b, &item) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| if item.ExpiresAt < time.Now().Unix() { | ||
| return backoff.Permanent(fmt.Errorf("presigned URL expired")) | ||
| } | ||
|
|
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| return nil | ||
| }, bo) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| var blocks protocol.BlocksData | ||
|
|
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| err = backoff.Retry(func() error { | ||
| resp, err := httpclient.Default.Get(item.PresignedURL) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| defer resp.Body.Close() | ||
|
|
||
| if resp.StatusCode != 200 { | ||
| return fmt.Errorf("unexpected status code: %d", resp.StatusCode) | ||
| } | ||
|
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| gzipReader, err := gzip.NewReader(resp.Body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| b, err := io.ReadAll(gzipReader) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| err = proto.Unmarshal(b, &blocks) | ||
| if err != nil { | ||
| return backoff.Permanent(err) | ||
| } | ||
|
|
||
| return nil | ||
| }, bo) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &blocks, nil | ||
| } |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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