extract go-bee ethereum key from dir

main.go

package main

import (
	"fmt"

	"github.com/ethersphere/bee/pkg/crypto"
	filekeystore "github.com/ethersphere/bee/pkg/keystore/file"
)

func main() {
	keystore := filekeystore.New("./keys")
	password := "my-password-here"
	swarmPrivateKey, created, err := keystore.Key("swarm", password)
	if err != nil {
		panic(err)
	}
	_ = created
	signer := crypto.NewDefaultSigner(swarmPrivateKey)
	// publicKey := &swarmPrivateKey.PublicKey
	overlayEthAddress, err := signer.EthereumAddress()
	if err != nil {
		panic(err)
	}
	fmt.Printf("got ethereum address: %x\n", overlayEthAddress)
}