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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,121 @@ | ||
package eth | ||
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import ( | ||
"context" | ||
"encoding/binary" | ||
"io" | ||
"net/http" | ||
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"github.com/prysmaticlabs/prysm/v5/config/params" | ||
"gopkg.in/yaml.v3" | ||
) | ||
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// 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 | ||
} | ||
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response, err := http.DefaultClient.Do(req) | ||
if err != nil { | ||
return nil, err | ||
} | ||
defer response.Body.Close() | ||
|
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data, err := io.ReadAll(response.Body) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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config := params.MainnetConfig().Copy() | ||
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out, err := params.UnmarshalConfig(data, config) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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return out, nil | ||
} | ||
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// 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 | ||
} | ||
|
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response, err := http.DefaultClient.Do(req) | ||
if err != nil { | ||
return nil, err | ||
} | ||
defer response.Body.Close() | ||
|
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data, err := io.ReadAll(response.Body) | ||
if err != nil { | ||
return nil, err | ||
} | ||
|
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var enrs []string | ||
err = yaml.Unmarshal(data, &enrs) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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return enrs, nil | ||
} | ||
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// 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 | ||
} | ||
|
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response, err := http.DefaultClient.Do(req) | ||
if err != nil { | ||
return 0, err | ||
} | ||
defer response.Body.Close() | ||
|
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data, err := io.ReadAll(response.Body) | ||
if err != nil { | ||
return 0, err | ||
} | ||
|
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var block uint64 | ||
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err = yaml.Unmarshal(data, &block) | ||
if err != nil { | ||
return 0, err | ||
} | ||
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return block, nil | ||
} | ||
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// 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 | ||
} | ||
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response, err := http.DefaultClient.Do(req) | ||
if err != nil { | ||
return 0, [32]byte{}, err | ||
} | ||
defer response.Body.Close() | ||
|
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// 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 | ||
} | ||
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genesisTime := binary.LittleEndian.Uint64(data[:8]) | ||
var genesisValidatorsRoot [32]byte | ||
copy(genesisValidatorsRoot[:], data[8:]) | ||
|
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return genesisTime, genesisValidatorsRoot, nil | ||
} |
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