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client_connect_wallet.go
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client_connect_wallet.go
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package api
import (
"context"
"errors"
"fmt"
"code.vegaprotocol.io/vega/libs/jsonrpc"
"code.vegaprotocol.io/vega/wallet/preferences"
"code.vegaprotocol.io/vega/wallet/wallet"
)
const (
WalletConnectionSuccessfullyEstablished = "The connection to the wallet has been successfully established."
PassphraseRequestReasonUnlockWallet = "The application wants to unlock the wallet."
)
type ClientConnectWallet struct {
walletStore WalletStore
interactor Interactor
}
// Handle initiates the wallet connection between the API and a third-party
// application.
//
// It triggers a selection of the wallet the client wants to use for this
// connection. The wallet is then loaded in memory. All changes done to that wallet
// will start in-memory, and then, be saved in the wallet file. Any changes done
// to the wallet outside the JSON-RPC session (via the command-line for example)
// will be overridden. For the effects to be taken into account, the wallet has
// to be disconnected first, and then re-connected.
//
// All sessions have to be initialized by using this handler. Otherwise, a call
// to any other handlers will be rejected.
func (h *ClientConnectWallet) Handle(ctx context.Context, hostname string) (wallet.Wallet, *jsonrpc.ErrorDetails) {
traceID := jsonrpc.TraceIDFromContext(ctx)
if err := h.interactor.NotifyInteractionSessionBegan(ctx, traceID, WalletConnectionWorkflow, 4); err != nil {
return nil, RequestNotPermittedError(err)
}
defer h.interactor.NotifyInteractionSessionEnded(ctx, traceID)
availableWallets, err := h.walletStore.ListWallets(ctx)
if err != nil {
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("could not list the available wallets: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
if len(availableWallets) == 0 {
h.interactor.NotifyError(ctx, traceID, ApplicationErrorType, ErrNoWalletToConnectTo)
return nil, ApplicationCancellationError(ErrApplicationCancelledTheRequest)
}
var approval preferences.ConnectionApproval
for {
rawApproval, err := h.interactor.RequestWalletConnectionReview(ctx, traceID, 1, hostname)
if err != nil {
if errDetails := HandleRequestFlowError(ctx, traceID, h.interactor, err); errDetails != nil {
return nil, errDetails
}
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("reviewing the wallet connection failed: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
a, err := preferences.ParseConnectionApproval(rawApproval)
if err != nil {
h.interactor.NotifyError(ctx, traceID, UserErrorType, err)
continue
}
approval = a
break
}
if isConnectionRejected(approval) {
return nil, UserRejectionError(ErrUserRejectedWalletConnection)
}
var walletName string
if len(availableWallets) > 1 {
for {
if ctx.Err() != nil {
h.interactor.NotifyError(ctx, traceID, ApplicationErrorType, ErrRequestInterrupted)
return nil, RequestInterruptedError(ErrRequestInterrupted)
}
selectedWallet, err := h.interactor.RequestWalletSelection(ctx, traceID, 2, hostname, availableWallets)
if err != nil {
if errDetails := HandleRequestFlowError(ctx, traceID, h.interactor, err); errDetails != nil {
return nil, errDetails
}
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("requesting the wallet selection failed: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
if exist, err := h.walletStore.WalletExists(ctx, selectedWallet); err != nil {
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("could not verify the wallet existence: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
} else if !exist {
h.interactor.NotifyError(ctx, traceID, UserErrorType, ErrWalletDoesNotExist)
continue
}
walletName = selectedWallet
break
}
} else {
// There is single wallet available, it doesn't make sense to ask which
// wallet to use.
walletName = availableWallets[0]
}
alreadyUnlocked, err := h.walletStore.IsWalletAlreadyUnlocked(ctx, walletName)
if err != nil {
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("could not verify whether the wallet is already unlock or not: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
if !alreadyUnlocked {
for {
if ctx.Err() != nil {
h.interactor.NotifyError(ctx, traceID, ApplicationErrorType, ErrRequestInterrupted)
return nil, RequestInterruptedError(ErrRequestInterrupted)
}
walletPassphrase, err := h.interactor.RequestPassphrase(ctx, traceID, 3, walletName, PassphraseRequestReasonUnlockWallet)
if err != nil {
if errDetails := HandleRequestFlowError(ctx, traceID, h.interactor, err); errDetails != nil {
return nil, errDetails
}
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("requesting the wallet passphrase failed: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
if err := h.walletStore.UnlockWallet(ctx, walletName, walletPassphrase); err != nil {
if errors.Is(err, wallet.ErrWrongPassphrase) {
h.interactor.NotifyError(ctx, traceID, UserErrorType, wallet.ErrWrongPassphrase)
continue
}
if errDetails := HandleRequestFlowError(ctx, traceID, h.interactor, err); errDetails != nil {
return nil, errDetails
}
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("could not unlock the wallet: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
break
}
}
w, err := h.walletStore.GetWallet(ctx, walletName)
if err != nil {
h.interactor.NotifyError(ctx, traceID, InternalErrorType, fmt.Errorf("could not retrieve the wallet: %w", err))
return nil, InternalError(ErrCouldNotConnectToWallet)
}
h.interactor.NotifySuccessfulRequest(ctx, traceID, 4, WalletConnectionSuccessfullyEstablished)
return w, nil
}
func isConnectionRejected(approval preferences.ConnectionApproval) bool {
return approval != preferences.ApprovedOnlyThisTime
}
func NewConnectWallet(walletStore WalletStore, interactor Interactor) *ClientConnectWallet {
return &ClientConnectWallet{
walletStore: walletStore,
interactor: interactor,
}
}