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Merge pull request #7 from probe-lab/main
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| package eth | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/binary" | ||
| "io" | ||
| "net/http" | ||
|
|
||
| "github.com/prysmaticlabs/prysm/v5/config/params" | ||
| "gopkg.in/yaml.v3" | ||
| ) | ||
|
|
||
| // FetchConfigFromURL fetches the beacon chain config from a given URL. | ||
| func FetchConfigFromURL(ctx context.Context, url string) (*params.BeaconChainConfig, error) { | ||
| req, err := http.NewRequestWithContext(ctx, "GET", url, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| response, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| data, err := io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| config := params.MainnetConfig().Copy() | ||
|
|
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| out, err := params.UnmarshalConfig(data, config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return out, nil | ||
| } | ||
|
|
||
| // FetchBootnodeENRsFromURL fetches the bootnode ENRs from a given URL. | ||
| func FetchBootnodeENRsFromURL(ctx context.Context, url string) ([]string, error) { | ||
| req, err := http.NewRequestWithContext(ctx, "GET", url, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| response, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| data, err := io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| var enrs []string | ||
| err = yaml.Unmarshal(data, &enrs) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return enrs, nil | ||
| } | ||
|
|
||
| // FetchDepositContractBlockFromURL fetches the deposit contract block from a given URL. | ||
| func FetchDepositContractBlockFromURL(ctx context.Context, url string) (uint64, error) { | ||
| req, err := http.NewRequestWithContext(ctx, "GET", url, nil) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| response, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| data, err := io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| var block uint64 | ||
|
|
||
| err = yaml.Unmarshal(data, &block) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| return block, nil | ||
| } | ||
|
|
||
| // FetchGenesisDetailsFromURL fetches the genesis time and validators root from a given URL. | ||
| func FetchGenesisDetailsFromURL(ctx context.Context, url string) (uint64, [32]byte, error) { | ||
| req, err := http.NewRequestWithContext(ctx, "GET", url, nil) | ||
| if err != nil { | ||
| return 0, [32]byte{}, err | ||
| } | ||
|
|
||
| response, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return 0, [32]byte{}, err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| // Read only the first 40 bytes (8 bytes for GenesisTime + 32 bytes for GenesisValidatorsRoot) | ||
| data := make([]byte, 40) | ||
| _, err = io.ReadFull(response.Body, data) | ||
| if err != nil { | ||
| return 0, [32]byte{}, err | ||
| } | ||
|
|
||
| genesisTime := binary.LittleEndian.Uint64(data[:8]) | ||
| var genesisValidatorsRoot [32]byte | ||
| copy(genesisValidatorsRoot[:], data[8:]) | ||
|
|
||
| return genesisTime, genesisValidatorsRoot, nil | ||
| } |
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