accounts/keystore, cmd/faucet: return old account to allow unlock

accounts/keystore/keystore.go

@@ -449,19 +449,25 @@ func (ks *KeyStore) Import(keyJSON []byte, passphrase, newPassphrase string) (ac
 	}
 	ks.importMu.Lock()
 	defer ks.importMu.Unlock()
+
 	if ks.cache.hasAddress(key.Address) {
-		return accounts.Account{}, ErrAccountAlreadyExists
+		return accounts.Account{
+			Address: key.Address,
+		}, ErrAccountAlreadyExists
 	}
 	return ks.importKey(key, newPassphrase)
 }
 
 // ImportECDSA stores the given key into the key directory, encrypting it with the passphrase.
 func (ks *KeyStore) ImportECDSA(priv *ecdsa.PrivateKey, passphrase string) (accounts.Account, error) {
-	key := newKeyFromECDSA(priv)
 	ks.importMu.Lock()
 	defer ks.importMu.Unlock()
+
+	key := newKeyFromECDSA(priv)
 	if ks.cache.hasAddress(key.Address) {
-		return accounts.Account{}, ErrAccountAlreadyExists
+		return accounts.Account{
+			Address: key.Address,
+		}, ErrAccountAlreadyExists
 	}
 	return ks.importKey(key, passphrase)
 }

cmd/faucet/faucet.go

@@ -162,7 +162,6 @@ func main() {
 	if blob, err = ioutil.ReadFile(*accPassFlag); err != nil {
 		log.Crit("Failed to read account password contents", "file", *accPassFlag, "err", err)
 	}
-	// Delete trailing newline in password
 	pass := strings.TrimSuffix(string(blob), "\n")
 
 	ks := keystore.NewKeyStore(filepath.Join(os.Getenv("HOME"), ".faucet", "keys"), keystore.StandardScryptN, keystore.StandardScryptP)
@@ -173,8 +172,9 @@ func main() {
 	if err != nil && err != keystore.ErrAccountAlreadyExists {
 		log.Crit("Failed to import faucet signer account", "err", err)
 	}
-	ks.Unlock(acc, pass)
-
+	if err := ks.Unlock(acc, pass); err != nil {
+		log.Crit("Failed to unlock faucet signer account", "err", err)
+	}
 	// Assemble and start the faucet light service
 	faucet, err := newFaucet(genesis, *ethPortFlag, enodes, *netFlag, *statsFlag, ks, website.Bytes())
 	if err != nil {