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wallet.go
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wallet.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package faucet
import (
"context"
"errors"
"fmt"
"time"
"code.vegaprotocol.io/vega/paths"
"code.vegaprotocol.io/vega/wallet/wallet"
storev1 "code.vegaprotocol.io/vega/wallet/wallet/store/v1"
)
// ErrFaucetHasNoKeyInItsWallet is returned when trying to get the wallet
// key of the faucet whereas no key has been generated or added to the
// faucet's wallet.
var ErrFaucetHasNoKeyInItsWallet = errors.New("faucet has no key in its wallet")
type faucetWallet struct {
// publicKey is the one used to retrieve the private key to sign messages.
publicKey string
wallet wallet.Wallet
}
func (w *faucetWallet) Sign(message []byte) ([]byte, string, error) {
sig, err := w.wallet.SignAny(w.publicKey, message)
if err != nil {
return nil, "", fmt.Errorf("could not sign the message: %w", err)
}
return sig, w.publicKey, nil
}
type WalletGenerationResult struct {
Mnemonic string
FilePath string
Name string
PublicKey string
}
func GenerateWallet(vegaPaths paths.Paths, passphrase string) (*WalletGenerationResult, error) {
ctx := context.Background()
walletsHome, err := vegaPaths.CreateDataDirFor(paths.FaucetWalletsDataHome)
if err != nil {
return nil, fmt.Errorf("could not get directory for %s: %w", paths.FaucetWalletsDataHome, err)
}
store, err := storev1.InitialiseStore(walletsHome, false)
if err != nil {
return nil, fmt.Errorf("could not initialise faucet wallet store at %s: %w", walletsHome, err)
}
defer store.Close()
walletName := fmt.Sprintf("vega.%v", time.Now().UnixNano())
if exists, err := store.WalletExists(ctx, walletName); err != nil {
return nil, fmt.Errorf("couldn't verify the wallet existence: %w", err)
} else if exists {
return nil, wallet.ErrWalletAlreadyExists
}
w, recoveryPhrase, err := wallet.NewHDWallet(walletName)
if err != nil {
return nil, fmt.Errorf("could not generate faucet wallet: %w", err)
}
keyPair, err := w.GenerateKeyPair([]wallet.Metadata{})
if err != nil {
return nil, fmt.Errorf("could not generate key pair for faucet wallet %s: %w", walletName, err)
}
if err := store.CreateWallet(ctx, w, passphrase); err != nil {
return nil, fmt.Errorf("could not save the generated faucet wallet: %w", err)
}
return &WalletGenerationResult{
Mnemonic: recoveryPhrase,
FilePath: store.GetWalletPath(walletName),
Name: walletName,
PublicKey: keyPair.PublicKey(),
}, nil
}
func loadWallet(vegaPaths paths.Paths, walletName, passphrase string) (*faucetWallet, error) {
ctx := context.Background()
walletsHome, err := vegaPaths.CreateDataDirFor(paths.FaucetWalletsDataHome)
if err != nil {
return nil, fmt.Errorf("could not get directory for %q: %w", paths.FaucetWalletsDataHome, err)
}
store, err := storev1.InitialiseStore(walletsHome, false)
if err != nil {
return nil, fmt.Errorf("could not initialise faucet wallet store at %q: %w", walletsHome, err)
}
defer store.Close()
if exists, err := store.WalletExists(ctx, walletName); err != nil {
return nil, fmt.Errorf("could not verify the faucet wallet existence: %w", err)
} else if !exists {
return nil, fmt.Errorf("the faucet wallet %q does not exist", walletName)
}
if err := store.UnlockWallet(ctx, walletName, passphrase); err != nil {
if errors.Is(err, wallet.ErrWrongPassphrase) {
return nil, err
}
return nil, fmt.Errorf("could not unlock the faucet wallet %q: %w", walletName, err)
}
w, err := store.GetWallet(ctx, walletName)
if err != nil {
return nil, fmt.Errorf("could not get the faucet wallet %q: %w", walletName, err)
}
keyPairs := w.ListKeyPairs()
if len(keyPairs) == 0 {
return nil, ErrFaucetHasNoKeyInItsWallet
}
return &faucetWallet{
wallet: w,
publicKey: keyPairs[0].PublicKey(),
}, nil
}