Fantom-foundation/go-lachesis

package main

import (
    "github.com/ethereum/go-ethereum/common"
    cli "gopkg.in/urfave/cli.v1"

    "github.com/Fantom-foundation/go-lachesis/crypto"
    "github.com/Fantom-foundation/go-lachesis/gossip"
)

var validatorFlag = cli.StringFlag{
    Name:  "validator",
    Usage: "Address of a validator to create events from",
    Value: "no",
}

func getValidatorAddr(ctx *cli.Context, cfg *gossip.EmitterConfig) common.Address {
    // Extract the current validator address, new flag overriding legacy one
    validator := cfg.Validator
    switch {
    case ctx.GlobalIsSet(validatorFlag.Name):
        validatorStr := ctx.GlobalString(validatorFlag.Name)
        if validatorStr != "no" && validatorStr != "0" {
            validator = common.HexToAddress(validatorStr)
        }
    case ctx.GlobalIsSet(FakeNetFlag.Name):
        key := getFakeValidator(ctx)
        if key != nil {
            validator = crypto.PubkeyToAddress(key.PublicKey)
        }
    }
    return validator
}

// setValidator retrieves the validator address either from the directly specified
// command line flags or from the keystore if CLI indexed.
func setValidator(ctx *cli.Context, cfg *gossip.EmitterConfig) {
    cfg.Validator = getValidatorAddr(ctx, cfg)
}