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hw_wallet.go
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/
hw_wallet.go
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package ledger
import (
"fmt"
"log"
"os"
"sync"
"golang.org/x/crypto/sha3"
"github.com/ethereum/go-ethereum/crypto"
)
var (
nanos *NanoS //singleton
once sync.Once
)
func getLedger() *NanoS {
once.Do(func() {
var err error
nanos, err = OpenNanoS()
if err != nil {
log.Fatalln("Couldn't open device:", err)
os.Exit(-1)
}
})
return nanos
}
// GetAddress ProcessAddressCommand list the address associated with Ledger Nano S
func GetAddress() string {
n := getLedger()
addr, err := n.GetAddress()
if err != nil {
log.Fatalln("Couldn't get address:", err)
os.Exit(-1)
}
return addr
}
//ProcessAddressCommand list the address associated with Ledger Nano S
func ProcessAddressCommand() {
n := getLedger()
addr, err := n.GetAddress()
if err != nil {
log.Fatalln("Couldn't get address:", err)
os.Exit(-1)
}
fmt.Printf("%-24s\t\t%23s\n", "NAME", "ADDRESS")
fmt.Printf("%-48s\t%s\n", "Ledger Nano S", addr)
}
// SignTx signs the given transaction with the requested account.
func SignTx(tx []byte) ([]byte, error) {
n := getLedger()
sig, err := n.SignTxn(tx)
if err != nil {
log.Println("Couldn't sign transaction, error:", err)
return nil, err
}
var hashBytes [32]byte
hw := sha3.NewLegacyKeccak256()
hw.Write(tx[:])
hw.Sum(hashBytes[:0])
pubkey, err := crypto.Ecrecover(hashBytes[:], sig[:])
if err != nil {
log.Println("Ecrecover failed :", err)
return nil, err
}
if len(pubkey) == 0 || pubkey[0] != 4 {
log.Println("invalid public key")
return nil, err
}
//pubBytes := crypto.Keccak256(pubkey[1:65])[12:]
//signerAddr, _ := address.PubkeyToAddress(pubBytes)
// TODO:
//return sig, nil
return nil, nil
}