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fix(blobstorage): blockId determination by timestamp (#16614)
Co-authored-by: jeff <113397187+cyberhorsey@users.noreply.github.com> Co-authored-by: David <david@taiko.xyz>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package indexer | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "strconv" | ||
| "time" | ||
| ) | ||
|
|
||
| var ( | ||
| blobURL = "eth/v1/beacon/blob_sidecars" | ||
| genesisURL = "eth/v1/beacon/genesis" | ||
| configURL = "eth/v1/config/spec" | ||
| ) | ||
|
|
||
| type GetSpecResponse struct { | ||
| Data map[string]string `json:"data"` | ||
| } | ||
|
|
||
| type GenesisResponse struct { | ||
| Data struct { | ||
| GenesisTime string `json:"genesis_time"` | ||
| } `json:"data"` | ||
| } | ||
|
|
||
| type BeaconClient struct { | ||
| *http.Client | ||
| beaconURL string | ||
| genesisTime uint64 | ||
| secondsPerSlot uint64 | ||
| } | ||
|
|
||
| type BlobsResponse struct { | ||
| Data []struct { | ||
| Index string `json:"index"` | ||
| Blob string `json:"blob"` | ||
| KzgCommitment string `json:"kzg_commitment"` | ||
| KzgCommitmentHex []byte `json:"-"` | ||
| } `json:"data"` | ||
| } | ||
|
|
||
| func NewBeaconClient(cfg *Config, timeout time.Duration) (*BeaconClient, error) { | ||
| httpClient := &http.Client{Timeout: timeout} | ||
|
|
||
| // Get the genesis time. | ||
| url := fmt.Sprintf("%s/%s", cfg.BeaconURL, genesisURL) | ||
| genesisTime, err := getGenesisTime(url, httpClient) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get genesis time: %v", err) | ||
| } | ||
|
|
||
| url = fmt.Sprintf("%s/%s", cfg.BeaconURL, configURL) | ||
| // Get the seconds per slot. | ||
| secondsPerSlot, err := getConfigValue(url, "SECONDS_PER_SLOT", httpClient) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get SECONDS_PER_SLOT: %v", err) | ||
| } | ||
|
|
||
| secondsPerSlotUint64, err := strconv.ParseUint(secondsPerSlot, 10, 64) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &BeaconClient{ | ||
| beaconURL: cfg.BeaconURL, | ||
| genesisTime: genesisTime, | ||
| secondsPerSlot: secondsPerSlotUint64, | ||
| }, nil | ||
| } | ||
|
|
||
| func getGenesisTime(endpoint string, client *http.Client) (uint64, error) { | ||
| res, err := client.Get(endpoint) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| defer res.Body.Close() | ||
|
|
||
| var genesisDetail GenesisResponse | ||
| if err := json.NewDecoder(res.Body).Decode(&genesisDetail); err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| return strconv.ParseUint(genesisDetail.Data.GenesisTime, 10, 64) | ||
| } | ||
|
|
||
| func getConfigValue(endpoint, key string, client *http.Client) (string, error) { | ||
| res, err := client.Get(endpoint) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer res.Body.Close() | ||
|
|
||
| var spec GetSpecResponse | ||
| if err := json.NewDecoder(res.Body).Decode(&spec); err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| value, ok := spec.Data[key] | ||
| if !ok { | ||
| return "", fmt.Errorf("key %s not found in config spec", key) | ||
| } | ||
|
|
||
| return value, nil | ||
| } | ||
|
|
||
| func (c *BeaconClient) getBlobs(ctx context.Context, blockID uint64) (*BlobsResponse, error) { | ||
| url := fmt.Sprintf("%s/%s/%v", c.beaconURL, blobURL, blockID) | ||
| response, err := http.Get(url) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| body, err := io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var responseData BlobsResponse | ||
| if err := json.Unmarshal(body, &responseData); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return &responseData, nil | ||
| } | ||
|
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| func (c *BeaconClient) timeToSlot(timestamp uint64) (uint64, error) { | ||
| if timestamp < c.genesisTime { | ||
| return 0, fmt.Errorf("provided timestamp (%v) precedes genesis time (%v)", timestamp, c.genesisTime) | ||
| } | ||
| return (timestamp - c.genesisTime) / c.secondsPerSlot, nil | ||
| } |
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