62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package utils
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import (
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"encoding/json"
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"fmt"
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"os"
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"github.com/cerc-io/plugeth-statediff/utils/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// Fatalf formats a message to standard error and exits the program.
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func Fatalf(format string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, "Fatal: "+format+"\n", args...)
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os.Exit(1)
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}
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func MustDecode[T any](buf []byte) *T {
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var ret T
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err := rlp.DecodeBytes(buf, &ret)
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if err != nil {
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panic(fmt.Errorf("error decoding RLP %T: %w", ret, err))
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}
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return &ret
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}
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// LoadConfig loads chain config from json file
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func LoadConfig(chainConfigPath string) (*params.ChainConfig, error) {
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file, err := os.Open(chainConfigPath)
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if err != nil {
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log.Error("Failed to read chain config file", "error", err)
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return nil, err
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}
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defer file.Close()
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chainConfig := new(params.ChainConfig)
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if err := json.NewDecoder(file).Decode(chainConfig); err != nil {
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log.Error("invalid chain config file", "error", err)
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return nil, err
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}
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log.Debug(fmt.Sprintf("Using chain config from '%s'. Content: %+v", chainConfigPath, chainConfig))
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return chainConfig, nil
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}
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// ChainConfig returns the appropriate ethereum chain config for the provided chain id
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func ChainConfig(chainID uint64) (*params.ChainConfig, error) {
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switch chainID {
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case 1:
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return params.MainnetChainConfig, nil
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case 4:
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return params.RinkebyChainConfig, nil
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case 5:
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return params.GoerliChainConfig, nil
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default:
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return nil, fmt.Errorf("chain config for chainid %d not available", chainID)
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}
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}
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