accounts

package
v0.1.2 Latest Latest
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 Go to latest Published: Jun 22, 2022 License: GPL-3.0, LGPL-3.0 Imports: 14 Imported by: 0

Documentation

Overview

Package accounts implements high level Ethereum account management.

Index

Constants

View Source 
const (
	MimetypeDataWithValidator = "data/validator"
	MimetypeTypedData         = "data/typed"
	MimetypeClique            = "application/x-clique-header"
	MimetypeTextPlain         = "text/plain"
)

Variables

View Source 
var DefaultBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}

DefaultBaseDerivationPath is the base path from which custom derivation endpoints are incremented. As such, the first account will be at m/44'/60'/0'/0/0, the second at m/44'/60'/0'/0/1, etc.

View Source 
var DefaultRootDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}

DefaultRootDerivationPath is the root path to which custom derivation endpoints are appended. As such, the first account will be at m/44'/60'/0'/0, the second at m/44'/60'/0'/1, etc.

View Source 
var ErrAXIAwalletAlreadyOpen = errors.New("axiawallet already open")

ErrAXIAwalletAlreadyOpen is returned if a axiawallet is attempted to be opened the second time.

View Source 
var ErrAXIAwalletClosed = errors.New("axiawallet closed")

ErrAXIAwalletClosed is returned if a axiawallet is attempted to be opened the second time.

View Source 
var ErrInvalidPassphrase = errors.New("invalid password")

ErrInvalidPassphrase is returned when a decryption operation receives a bad passphrase.

View Source 
var ErrNotSupported = errors.New("not supported")

ErrNotSupported is returned when an operation is requested from an account backend that it does not support.

View Source 
var ErrUnknownAXIAwallet = errors.New("unknown axiawallet")

ErrUnknownAXIAwallet is returned for any requested operation for which no backend provides the specified axiawallet.

View Source 
var ErrUnknownAccount = errors.New("unknown account")

ErrUnknownAccount is returned for any requested operation for which no backend provides the specified account.

View Source 
var LegacyLedgerBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}

LegacyLedgerBaseDerivationPath is the legacy base path from which custom derivation endpoints are incremented. As such, the first account will be at m/44'/60'/0'/0, the second at m/44'/60'/0'/1, etc.

Functions

func NewAuthNeededError 

func NewAuthNeededError(needed string) error

NewAuthNeededError creates a new authentication error with the extra details about the needed fields set.

func TextAndHash 

func TextAndHash(data []byte) ([]byte, string)

TextAndHash is a helper function that calculates a hash for the given message that can be safely used to calculate a signature from.

The hash is calculated as 

keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).

This gives context to the signed message and prevents signing of transactions.

func TextHash 

func TextHash(data []byte) []byte

TextHash is a helper function that calculates a hash for the given message that can be safely used to calculate a signature from.

The hash is calculated as 

keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).

This gives context to the signed message and prevents signing of transactions.

Types

type AXIAwallet 

type AXIAwallet interface {
	// URL retrieves the canonical path under which this axiawallet is reachable. It is
	// used by upper layers to define a sorting order over all axiawallets from multiple
	// backends.
	URL() URL

	// Status returns a textual status to aid the user in the current state of the
	// axiawallet. It also returns an error indicating any failure the axiawallet might have
	// encountered.
	Status() (string, error)

	// Open initializes access to a axiawallet instance. It is not meant to unlock or
	// decrypt account keys, rather simply to establish a connection to hardware
	// axiawallets and/or to access derivation seeds.
	//
	// The passphrase parameter may or may not be used by the implementation of a
	// particular axiawallet instance. The reason there is no passwordless open method
	// is to strive towards a uniform axiawallet handling, oblivious to the different
	// backend providers.
	//
	// Please note, if you open a axiawallet, you must close it to release any allocated
	// resources (especially important when working with hardware axiawallets).
	Open(passphrase string) error

	// Close releases any resources held by an open axiawallet instance.
	Close() error

	// Accounts retrieves the list of signing accounts the axiawallet is currently aware
	// of. For hierarchical deterministic axiawallets, 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 axiawallet or not.
	Contains(account Account) bool

	// Derive attempts to explicitly derive a hierarchical deterministic account at
	// the specified derivation path. If requested, the derived account will be added
	// to the axiawallet's tracked account list.
	Derive(path DerivationPath, pin bool) (Account, error)

	// SelfDerive sets a base account derivation path from which the axiawallet attempts
	// to discover non zero accounts and automatically add them to list of tracked
	// accounts.
	//
	// Note, self derivation will increment the last component of the specified path
	// opposed to descending into a child path to allow discovering accounts starting
	// from non zero components.
	//
	// Some hardware axiawallets switched derivation paths through their evolution, so
	// this method supports providing multiple bases to discover old user accounts
	// too. Only the last base will be used to derive the next empty account.
	//
	// You can disable automatic account discovery by calling SelfDerive with a nil
	// chain state reader.
	SelfDerive(bases []DerivationPath, chain interfaces.ChainStateReader)

	// SignData requests the axiawallet to sign the hash of the given data
	// 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 axiawallet 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 SignDataWithPassphrase, or by other means (e.g. unlock
	// the account in a keystore).
	SignData(account Account, mimeType string, data []byte) ([]byte, error)

	// SignDataWithPassphrase is identical to SignData, but also takes a password
	// NOTE: there's a chance that an erroneous call might mistake the two strings, and
	// supply password in the mimetype field, or vice versa. Thus, an implementation
	// should never echo the mimetype or return the mimetype in the error-response
	SignDataWithPassphrase(account Account, passphrase, mimeType string, data []byte) ([]byte, error)

	// SignText requests the axiawallet to sign the hash of a given piece of data, prefixed
	// by the Ethereum prefix scheme
	// 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 axiawallet 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 SignTextWithPassphrase, or by other means (e.g. unlock
	// the account in a keystore).
	//
	// This method should return the signature in 'canonical' format, with v 0 or 1.
	SignText(account Account, text []byte) ([]byte, error)

	// SignTextWithPassphrase is identical to Signtext, but also takes a password
	SignTextWithPassphrase(account Account, passphrase string, hash []byte) ([]byte, error)

	// SignTx requests the axiawallet 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 axiawallet 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)

	// SignTxWithPassphrase is identical to SignTx, but also takes a password
	SignTxWithPassphrase(account Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error)
}

AXIAwallet represents a software or hardware axiawallet that might contain one or more accounts (derived from the same seed).

type AXIAwalletEvent 

type AXIAwalletEvent struct {
	AXIAwallet AXIAwallet          // AXIAwallet instance arrived or departed
	Kind       AXIAwalletEventType // Event type that happened in the system
}

AXIAwalletEvent is an event fired by an account backend when a axiawallet arrival or departure is detected.

type AXIAwalletEventType 

type AXIAwalletEventType int

AXIAwalletEventType represents the different event types that can be fired by the axiawallet subscription subsystem. 

const (
	// AXIAwalletArrived is fired when a new axiawallet is detected either via USB or via
	// a filesystem event in the keystore.
	AXIAwalletArrived AXIAwalletEventType = iota

	// AXIAwalletOpened is fired when a axiawallet is successfully opened with the purpose
	// of starting any background processes such as automatic key derivation.
	AXIAwalletOpened

	// AXIAwalletDropped
	AXIAwalletDropped
)

type AXIAwalletsByURL 

type AXIAwalletsByURL []AXIAwallet

AXIAwalletsByURL implements sort.Interface for []AXIAwallet based on the URL field.

func (AXIAwalletsByURL) Len 

func (w AXIAwalletsByURL) Len() int

func (AXIAwalletsByURL) Less 

func (w AXIAwalletsByURL) Less(i, j int) bool

func (AXIAwalletsByURL) Swap 

func (w AXIAwalletsByURL) Swap(i, j int)

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 Ethereum account located at a specific location defined by the optional URL field.

type AccountsByURL 

type AccountsByURL []Account

AccountsByURL implements sort.Interface for []Account based on the URL field.

func (AccountsByURL) Len 

func (a AccountsByURL) Len() int

func (AccountsByURL) Less 

func (a AccountsByURL) Less(i, j int) bool

func (AccountsByURL) Swap 

func (a AccountsByURL) Swap(i, j int)

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 {
	// AXIAwallets retrieves the list of axiawallets the backend is currently aware of.
	//
	// The returned axiawallets are not opened by default. For software HD axiawallets this
	// means that no base seeds are decrypted, and for hardware axiawallets that no actual
	// connection is established.
	//
	// The resulting axiawallet list will be sorted alphabetically based on its internal
	// URL assigned by the backend. Since axiawallets (especially hardware) may come and
	// go, the same axiawallet might appear at a different positions in the list during
	// subsequent retrievals.
	AXIAwallets() []AXIAwallet

	// Subscribe creates an async subscription to receive notifications when the
	// backend detects the arrival or departure of a axiawallet.
	Subscribe(sink chan<- AXIAwalletEvent) event.Subscription
}

Backend is a "axiawallet provider" that may contain a batch of accounts they can sign transactions with and upon request, do so.

type Config 

type Config struct {
	InsecureUnlockAllowed bool // Whether account unlocking in insecure environment is allowed
}

Config contains the settings of the global account manager.

TODO(rjl493456442, karalabe, holiman): Get rid of this when account management is removed in favor of Clef.

type DerivationPath 

type DerivationPath []uint32

DerivationPath represents the computer friendly version of a hierarchical deterministic axiawallet account derivaion path.

The BIP-32 spec https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki defines derivation paths to be of the form: 

m / purpose' / coin_type' / account' / change / address_index

The BIP-44 spec https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki defines that the `purpose` be 44' (or 0x8000002C) for crypto currencies, and SLIP-44 https://github.com/satoshilabs/slips/blob/master/slip-0044.md assigns the `coin_type` 60' (or 0x8000003C) to Ethereum.

The root path for Ethereum is m/44'/60'/0'/0 according to the specification from https://github.com/ethereum/EIPs/issues/84, albeit it's not set in stone yet whether accounts should increment the last component or the children of that. We will go with the simpler approach of incrementing the last component.

func ParseDerivationPath 

func ParseDerivationPath(path string) (DerivationPath, error)

ParseDerivationPath converts a user specified derivation path string to the internal binary representation.

Full derivation paths need to start with the `m/` prefix, relative derivation paths (which will get appended to the default root path) must not have prefixes in front of the first element. Whitespace is ignored.

func (DerivationPath) MarshalJSON 

func (path DerivationPath) MarshalJSON() ([]byte, error)

MarshalJSON turns a derivation path into its json-serialized string

func (DerivationPath) String 

func (path DerivationPath) String() string

String implements the stringer interface, converting a binary derivation path to its canonical representation.

func (*DerivationPath) UnmarshalJSON 

func (path *DerivationPath) UnmarshalJSON(b []byte) error

UnmarshalJSON a json-serialized string back into a derivation path

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 

func NewManager(config *Config, backends ...Backend) *Manager

NewManager creates a generic account manager to sign transaction via various supported backends.

func (*Manager) AXIAwallet 

func (am *Manager) AXIAwallet(url string) (AXIAwallet, error)

AXIAwallet retrieves the axiawallet associated with a particular URL.

func (*Manager) AXIAwallets 

func (am *Manager) AXIAwallets() []AXIAwallet

AXIAwallets returns all signer accounts registered under this account manager.

func (*Manager) Accounts 

func (am *Manager) Accounts() []common.Address

Accounts returns all account addresses of all axiawallets within the account manager

func (*Manager) AddBackend 

func (am *Manager) AddBackend(backend Backend)

AddBackend starts the tracking of an additional backend for axiawallet updates. cmd/geth assumes once this func returns the backends have been already integrated.

func (*Manager) Backends 

func (am *Manager) Backends(kind reflect.Type) []Backend

Backends retrieves the backend(s) with the given type from the account manager.

func (*Manager) Close 

func (am *Manager) Close() error

Close terminates the account manager's internal notification processes.

func (*Manager) Config 

func (am *Manager) Config() *Config

Config returns the configuration of account manager.

func (*Manager) Find 

func (am *Manager) Find(account Account) (AXIAwallet, error)

Find attempts to locate the axiawallet corresponding to a specific account. Since accounts can be dynamically added to and removed from axiawallets, this method has a linear runtime in the number of axiawallets.

func (*Manager) Subscribe 

func (am *Manager) Subscribe(sink chan<- AXIAwalletEvent) event.Subscription

Subscribe creates an async subscription to receive notifications when the manager detects the arrival or departure of a axiawallet from any of its backends.

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
}

URL represents the canonical identification URL of a axiawallet or account.

It is a simplified version of url.URL, with the important limitations (which are considered features here) that it contains value-copyable components only, as well as that it doesn't do any URL encoding/decoding of special characters.

The former is important to allow an account to be copied without leaving live references to the original version, whereas the latter is important to ensure one single canonical form opposed to many allowed ones by the RFC 3986 spec.

As such, these URLs should not be used outside of the scope of an Ethereum axiawallet or account.

func (URL) Cmp 

func (u URL) Cmp(url URL) int

Cmp compares x and y and returns: 

-1 if x <  y
 0 if x == y
+1 if x >  y

func (URL) MarshalJSON 

func (u URL) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaller interface.

func (URL) String 

func (u URL) String() string

String implements the stringer interface.

func (URL) TerminalString 

func (u URL) TerminalString() string

TerminalString implements the log.TerminalStringer interface.

func (*URL) UnmarshalJSON 

func (u *URL) UnmarshalJSON(input []byte) error

UnmarshalJSON parses url.

Source Files

View all Source files

Directories

Path Synopsis
abi
Package abi implements the Ethereum ABI (Application Binary Interface).
 Package abi implements the Ethereum ABI (Application Binary Interface).
bind
Package bind generates Ethereum contract Go bindings.
 Package bind generates Ethereum contract Go bindings.
bind/backends
Package keystore implements encrypted storage of secp256k1 private keys.
 Package keystore implements encrypted storage of secp256k1 private keys.

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