Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ErrInvalidPassphrase = errors.New("invalid passphrase")
ErrInvalidPassphrase is returned when a decryption operation receives a bad passphrase.
var ErrNotSupported = errors.New("not supported")
ErrNotSupported is returned when an operation is requested from an account backend that it does not support.
var ErrUnknownAccount = errors.New("unknown account")
ErrUnknownAccount is returned for any requested operation for which no backend provides the specified account.
var ErrUnknownWallet = errors.New("unknown wallet")
ErrUnknownWallet is returned for any requested operation for which no backend provides the specified wallet.
var ErrWalletAlreadyOpen = errors.New("wallet already open")
ErrWalletAlreadyOpen is returned if a wallet is attempted to be opened the second time.
var ErrWalletClosed = errors.New("wallet closed")
ErrWalletClosed is returned if a wallet is attempted to be opened the secodn time.
Functions ¶
func NewAuthNeededError ¶
NewAuthNeededError creates a new authentication error with the extra details about the needed fields set.
Types ¶
type Account ¶
type Account struct {
Address common.Address `json:"address"` // Ethereum account address derived from the key
URL URL `json:"url"` // Optional resource locator within a backend
}
Account represents an justitia account located at a specific location defined by the optional URL field.
type AuthNeededError ¶
type AuthNeededError struct {
Needed string // Extra authentication the user needs to provide
}
AuthNeededError is returned by backends for signing requests where the user is required to provide further authentication before signing can succeed.
This usually means either that a password needs to be supplied, or perhaps a one time PIN code displayed by some hardware device.
func (*AuthNeededError) Error ¶
func (err *AuthNeededError) Error() string
Error implements the standard error interface.
type Backend ¶
type Backend interface {
// Wallets retrieves the list of wallets the backend is currently aware of.
//
// The returned wallets are not opened by default. For software HD wallets this
// means that no base seeds are decrypted, and for hardware wallets that no actual
// connection is established.
//
// The resulting wallet list will be sorted alphabetically based on its internal
// URL assigned by the backend. Since wallets (especially hardware) may come and
// go, the same wallet might appear at a different positions in the list during
// subsequent retrievals.
Wallets() []Wallet
}
Backend is a "wallet provider" that may contain a batch of accounts they can sign transactions with and upon request, do so.
type Manager ¶
type Manager struct {
// contains filtered or unexported fields
}
Manager is an overarching account manager that can communicate with various backends for signing transactions.
func NewManager ¶
NewManager creates a generic account manager to sign transaction via various supported backends.
func (*Manager) Backends ¶
Backends retrieves the backend(s) with the given type from the account manager.
func (*Manager) Find ¶
Find attempts to locate the wallet corresponding to a specific account. Since accounts can be dynamically added to and removed from wallets, this method has a linear runtime in the number of wallets.
type URL ¶
type URL struct {
Scheme string // Protocol scheme to identify a capable account backend
Path string // Path for the backend to identify a unique entity
}
func (URL) MarshalJSON ¶
MarshalJSON implements the json.Marshaller interface.
func (URL) TerminalString ¶
TerminalString implements the log.TerminalStringer interface.
func (*URL) UnmarshalJSON ¶
UnmarshalJSON parses url.
type Wallet ¶
type Wallet interface {
// URL retrieves the canonical path under which this wallet is reachable. It is
// user by upper layers to define a sorting order over all wallets from multiple
// backends.
URL() URL
// Status returns a textual status to aid the user in the current state of the
// wallet. It also returns an error indicating any failure the wallet might have
// encountered.
Status() (string, error)
// Open initializes access to a wallet instance. It is not meant to unlock or
// decrypt account keys, rather simply to establish a connection to hardware
// wallets and/or to access derivation seeds.
//
// The passphrase parameter may or may not be used by the implementation of a
// particular wallet instance. The reason there is no passwordless open method
// is to strive towards a uniform wallet handling, oblivious to the different
// backend providers.
//
// Please note, if you open a wallet, you must close it to release any allocated
// resources (especially important when working with hardware wallets).
Open(passphrase string) error
// Close releases any resources held by an open wallet instance.
Close() error
// Accounts retrieves the list of signing accounts the wallet is currently aware
// of. For hierarchical deterministic wallets, the list will not be exhaustive,
// rather only contain the accounts explicitly pinned during account derivation.
Accounts() []Account
// Contains returns whether an account is part of this particular wallet or not.
Contains(account Account) bool
// SignHash requests the wallet to sign the given hash.
//
// It looks up the account specified either solely via its address contained within,
// or optionally with the aid of any location metadata from the embedded URL field.
//
// If the wallet requires additional authentication to sign the request (e.g.
// a password to decrypt the account, or a PIN code o verify the transaction),
// an AuthNeededError instance will be returned, containing infos for the user
// about which fields or actions are needed. The user may retry by providing
// the needed details via SignHashWithPassphrase, or by other means (e.g. unlock
// the account in a keystore).
SignHash(account Account, hash []byte) ([]byte, error)
// SignTx requests the wallet to sign the given transaction.
//
// It looks up the account specified either solely via its address contained within,
// or optionally with the aid of any location metadata from the embedded URL field.
//
// If the wallet requires additional authentication to sign the request (e.g.
// a password to decrypt the account, or a PIN code to verify the transaction),
// an AuthNeededError instance will be returned, containing infos for the user
// about which fields or actions are needed. The user may retry by providing
// the needed details via SignTxWithPassphrase, or by other means (e.g. unlock
// the account in a keystore).
SignTx(account Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)
// SignHashWithPassphrase requests the wallet to sign the given hash with the
// given passphrase as extra authentication information.
//
// It looks up the account specified either solely via its address contained within,
// or optionally with the aid of any location metadata from the embedded URL field.
SignHashWithPassphrase(account Account, passphrase string, hash []byte) ([]byte, error)
// SignTxWithPassphrase requests the wallet to sign the given transaction, with the
// given passphrase as extra authentication information.
//
// It looks up the account specified either solely via its address contained within,
// or optionally with the aid of any location metadata from the embedded URL field.
SignTxWithPassphrase(account Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)
}
type WalletEvent ¶
type WalletEvent struct {
Wallet Wallet // Wallet instance arrived or departed
Kind WalletEventType // Event type that happened in the system
}
WalletEvent is an event fired by an account backend when a wallet arrival or departure is detected.
type WalletEventType ¶
type WalletEventType int
WalletEventType represents the different event types that can be fired by the wallet subscription subsystem.
const ( // WalletArrived is fired when a new wallet is detected either via USB or via // a filesystem event in the keystore. WalletArrived WalletEventType = iota // WalletOpened is fired when a wallet is successfully opened with the purpose // of starting any background processes such as automatic key derivation. WalletOpened // WalletDropped WalletDropped )
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