aergoio/aergo

/*
 * @file
 * @copyright defined in aergo/LICENSE.txt
 */

package server

import (
    "encoding/json"
    "fmt"
    "os"

    "github.com/aergoio/aergo/v2/types"
)

// readGenesis is based on code in cmd/aergosvr/cmd.go .
func readGenesis(filePath string) (ret *types.Genesis, rerr error) {
    jsonpath := filePath

    file, err := os.Open(jsonpath)
    if err != nil {
        rerr = fmt.Errorf("fail to open %s \n", jsonpath)
        return
    }
    defer file.Close()

    // use default config's DataDir if empty
    genesis := new(types.Genesis)
    if err := json.NewDecoder(file).Decode(genesis); err != nil {
        rerr = fmt.Errorf("fail to deserialize %s (error:%s)\n", jsonpath, err)
        return
    }

    if err := genesis.Validate(); err != nil {
        rerr = fmt.Errorf(" %s (error:%s)\n", jsonpath, err)
        return
    }
    ret = genesis
    return
}