waku

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 Go to latest Published: Apr 15, 2021 License: MPL-2.0 Imports: 25 Imported by: 0

README

waku

Table of contents

What is Waku?

Waku is a communication protocol for sending messages between Dapps. Waku is a fork of the Ethereum Whisper subprotocol, although not directly compatible with Whisper, both Waku and Whisper subprotocols can communicate via bridging.

Waku was created to solve scaling issues with Whisper and currently diverges from Whisper in the following ways:

  • RLPx subprotocol is changed from shh/6 to waku/1.
  • Light node capability is added.*
  • Optional rate limiting is added.
  • Status packet has following additional parameters: light-node, confirmations-enabled and rate-limits
  • Mail Server and Mail Client functionality is now part of the specification.
  • P2P Message packet contains a list of envelopes instead of a single envelope.

*As per vacp2p/specs#117 Waku de jure introduced light nodes as far as updates to the written Whisper specifications. Though the de facto case is that the go-ethereum Whisper implementation had already implemented light nodes and weren't a new feature in code.

Although status-go's Waku light node functionality is a direct fork of go-ethereum's Whisper light node functionality, technically, as far as specifications are concerned, light nodes are considered a new feature introduced in Waku.

Waku versioning

This package follows a versioning pattern that makes clean separation between breaking versions. As detailed in the PR that introduced this strategy to the package.

... the way we will move across versions is to maintain completely separate codebases and eventually remove those that are not supported anymore.

This has the drawback of some code duplication, but the advantage is that is more explicit what each version requires, and changes in one version will not impact the other, so we won't pile up backward compatible code. This is the same strategy used by whisper in go ethereum and is influenced by https://www.youtube.com/watch?v=oyLBGkS5ICk.

Familiarise yourself with the Spec-ulation Keynote by Rich Hickey, if you wish to more deeply understand the rationale for this versioning implementation.

This means that breaking changes will necessitate a new protocol version and a new version sub-package. The packages follow the naming convention of v* where * represents the major / breaking version number of the protocol.

Currently the package has the following version sub-packages:

What does this package do?

The basic function of this package is to implement the waku specifications, and provide the status-go binary with the ability to send and receive messages via Waku.

Waku package files

Root

waku.go

waku.go serves as the main entry point for the package and where the main Waku{} struct lives.

api.go

api.go is home to the PublicWakuAPI{} struct which provides the waku RPC service that can be used publicly without security implications.

PublicWakuAPI{} wraps the main Waku{}, making the Waku{} functionality suitable for external consumption.

Consumption

PublicWakuAPI{} is wrapped by eth-node\bridge\geth.gethPublicWakuAPIWrapper{}, which is initialised via eth-node\bridge\geth.NewGethPublicWakuAPIWrapper() and exposed via gethWakuWrapper.PublicWakuAPI() and is finally consumed by wider parts of the application.

Notes

It is worth noting that each function of PublicWakuAPI{} received an unused context.Context parameter. This is originally passed in way higher up the food-chain and without significant refactoring is not a simple thing to remove / change. Mobile bindings depend on the ability to pass in a context.

config.go

config.go is home to the Config{} struct and the declaration of DefaultConfig.

Config{} is used to initialise the settings of an instantiated Waku{}. waku.New() creates a new instance of a Waku{} and takes a Config{} as a parameter, if nil is passed instead of an instance of Config{}, DefaultConfig is used.

Configuration values
Name Type Description
MaxMessageSize uint32 Sets the maximum size of a waku message in bytes
MinimumAcceptedPoW float64 Sets the minimum amount of work a message needs to have to be accepted by the waku node
BloomFilterMode bool When true, the waku node only matches against bloom filter
LightClient bool When true, the waku node does not forward messages
FullNode bool When true, the waku node forwards all messages
RestrictLightClientsConn bool When true, the waku node does not accept light clients as peers if it is a light client itself
EnableConfirmations bool When true, sends message confirmations
Default

The default configuration for a status-go Waku node is:

MaxMessageSize           : 1Mb
MinimumAcceptedPoW       : 0.2
RestrictLightClientsConn : true
mailserver.go

mailserver.go is home to MailServer interface, which is implemented by mailserver.WakuMailServer{} found in the package file mailserver/mailserver.go. MailServer represents a mail server, capable of receiving and archiving messages for subsequent delivery to the peers.

Additionally this package is home to MailServerResponse{} which represents the response payload sent by the mail-server. MailServerResponse{} is ultimately initialised by CreateMailServerEvent(), which is tied to the main Waku{} via the Waku.OnP2PRequestCompleted() function. This is ultimately accessed via the Peer.Run() function and is made available outside of the package with the waku.HandlePeer() function via Waku.protocol.Run := waku.HandlePeer.

Common

bloomfilter.go

bloomfilter.go holds a few bloomfilter specific functions.

const.go

const.go, originally a hangover from the go-ethereum whisperv6/doc.go package file later refactored, is home to the common Waku constants.

Notes

Versions also have version specific const.go files.

envelope.go

envelope.go is home to the Evelope{} and EnvelopeError{} structs. Envelope{} is used as the data packet in which message data is sent through the Waku network.

Envelope{} is accessed via the initialisation function NewEnvelope(), which is exclusively consumed by Message.Wrap() that prepares a message to be sent via Waku.

errors.go

errors.go holds generic package errors.

events.go

events.go handles data related to Waku events. This file contains string type consts that identify known Waku events.

Additionally, the file contains EnvelopeEvent{}, which serves as a representation of events created by envelopes. EnvelopeEvent{}s are initialised exclusively within the waku package.

filter.go

filter.go is home to Filter{} which represents a waku filter.

Usage

A status-go node will install / register filters through RPC calls from a client (eg status-react). The basic implementation of a filter requires at least 2 things:

  1. An encryption key, example "superSafeEncryptionKey"
  2. A 4 byte topic (TopicType), example "0x1234"

The node will install the filter [0x1234][{"superSafeEncryptionKey"}] on an instance of Filters{} and will notify its peers of this event

When a node receives an envelope it will attempt to match the topics against the installed filters, and then try to decrypt the envelope if the topic matches.

For example, if a node receives an envelope with topic 0x1234, the node will try to use the installed filter key superSafeEncryptionKey to decrypt the message. On success the node passes the decrypted message to the client.

In addition to the basic example above Filter{} allows for richer filtering:

Field Name Type Description
Src *ecdsa.PublicKey Sender of the message. Currently not used
KeyAsym *ecdsa.PrivateKey Private Key of recipient
KeySym []byte Key associated with the Topic
Topics [][]byte Topics to filter messages with
PoW float64 Proof of work as described in the Waku specs .

Note: In status-react each client listens to the topic hash(pk), if a client wants to send a message to hash(pk1) they will also need to listen the hash(pk1) topic. However if the client doesn't want to receive envelopes for topic hash(pk1), the client may set the PoW to 1 so that all envelopes for topic hash(pk1) are discarded.
AllowP2P bool Indicates whether this filter is interested in direct peer-to-peer messages.

Note: Typically set to true, we always want to receive P2P envelopes on a filter from trusted peers
SymKeyHash common.Hash The Keccak256Hash of the symmetric key, needed for optimization

Waku / Whisper divergence

Whisper, will process all the installed filters that the node has, and build a BloomFilter from all the topics of each installed filter (i.e. func ToBloomFilter(topics []TopicType) []byte { ... }). When a peer receives this BloomFilter, it will match the topic on each envelope that they receive against the BloomFilter, if it matches, it will forward this to the peer.

Waku, by default, does not send a BloomFilter, instead sends the topic in a clear array of []TopicType. This is an improvement on Whisper's usage as a BloomFilter may include false positives, which increase bandwidth usage. In contrast, clear topics are matched exactly and therefore don't create redundant bandwidth usage.

helpers.go

helpers.go holds the package's generic functions.

message.go

message.go is home to all message related functionality and contains a number of structs:

Name Description
MessageParams{} Specifies the exact way a message should be wrapped into an Envelope
sentMessage{} Represents an end-user data packet to transmit through the Waku protocol. These are wrapped into Envelopes that need not be understood by intermediate nodes, just forwarded.
ReceivedMessage{} Represents a data packet to be received through the Waku protocol and successfully decrypted.
MessagesRequest{} Contains details of a request for historic messages.
MessagesResponse{} Represents a request response sent after processing batch of envelopes.
MessageStore interface Implemented by MemoryMessageStore{}
MemoryMessageStore{} Represents messages stored in a memory hash table.
metrics.go

metrics.go is home to Prometheus metric hooks, for counting a range of Waku related metrics.

protocol.go

protocol.go houses the Peer and WakuHost interfaces.

Peer represents a remote Waku client with which the local host waku instance exchanges data / messages.

WakuHost is the local instance of waku, which both interacts with remote clients (peers) and local clients (like status-react, via a RPC API).

rate_limiter.go

rate_limiter.go was introduced as an improvement to Whisper allowing Waku nodes to limit the rate at which data is transferred. These limits are defined by the RateLimits{} which allows nodes to limit the following:

Limit Type Description
IPLimits Messages per second from a single IP (default 0, no limits)
PeerIDLimits Messages per second from a single peer ID (default 0, no limits)
TopicLimits Messages per second from a single topic (default 0, no limits)

In addition to the RateLimits{} this file also contains the following interfaces and structs.

Name Description
RateLimiterPeer interface Represents a Peer{} that is capable of being rate limited
RateLimiterHandler interface Represents handler functionality for a Rate Limiter in the cases of exceeding a peer limit and exceeding an IP limit
MetricsRateLimiterHandler{} Implements RateLimiterHandler, represents a handler for reporting rate limit Exceed data to the metrics collection service (currently prometheus)
DropPeerRateLimiterHandler{} Implements RateLimiterHandler, represents a handler that introduces Tolerance to the number of Peer connections before Limit Exceeded errors are returned.
RateLimits{} Represents rate limit settings exchanged using rateLimitingCode packet or in the handshake.
PeerRateLimiterConfig{} Represents configurations for initialising a PeerRateLimiter
PeerRateLimiter{} Represents a rate limiter that limits communication between Peers

The default PeerRateLimiterConfig is:

LimitPerSecIP:      10,
LimitPerSecPeerID:  5,
WhitelistedIPs:     nil,
WhitelistedPeerIDs: nil,
topic.go

topic.go houses the TopicType type.

TopicType represents a cryptographically secure, probabilistic partial classification of a message, determined as the first (leftmost) 4 bytes of the SHA3 hash of some arbitrary data given by the original author of a message.

Topics are used to filter incoming messages that the host's user has registered interest in. For further details on filtering see filter.go.

Versioned

For details about the divergence between versions please consult the READMEs of each version package.

Version const.go

const.go is home to the version sub-package's consts. These constants are version dependant and, as expected, may change from version to version.

Version init.go

init.go is home to the version sub-package's initialisation, and is used to initialise struct based variables at runtime.

Version message.go

message.go is home to the MultiVersionResponse{} and Version1MessageResponse{} structs, both of which are exclusively consumed by the version subpackage's Peer{}.

Both of these structs are used for handling Waku message responses, also known as message confirmations.

Version1MessageResponse{} is used for sending message responses. MultiVersionResponse{} is used for handling incoming message responses.

Usage

Message confirmations are used to inform a user, via the UI, that a message has been sent. Initially the message is marked as "Pending" and eventually as "Sent".

In order to trigger the message state transition from "pending" to "sent", Waku uses MessageResponse{}. Each peer on receiving a message will send back a MessageResponse, see the NewMessagesResponse() function.

The Waku host checks that the peer is a mailserver and if this mailserver was selected by the user, if so the message will be marked as "Sent" in the UI.

For further details read the Waku specification section on the subject.

Notes

Versioning at the MessageResponse level (see the struct Version field) should be phased out and defer to the subpackage's version number. Consider removal once we decide to move to a new major Waku version (i.e. waku/2).

Version peer.go

peer.go holds the version's sub-package Peer{} implementation of the common.Peer interface.

Version status_options.go

status_options.go holds the version's sub-package StatusOptions{} which implements the ethereum/go-ethereum/rlp Decoder and Encoder interfaces.

StatusOptions defines additional information shared between peers during the handshake. There might be more options provided than fields in StatusOptions, and as per the specs, should be ignored during deserialisation to stay forward compatible. In the case of RLP, options should be serialised to an array of tuples where the first item is a field name and the second is a RLP-serialised value.

For further details on RLP see:

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrSymAsym              = errors.New("specify either a symmetric or an asymmetric key")
	ErrInvalidSymmetricKey  = errors.New("invalid symmetric key")
	ErrInvalidPublicKey     = errors.New("invalid public key")
	ErrInvalidSigningPubKey = errors.New("invalid signing public key")
	ErrTooLowPoW            = errors.New("message rejected, PoW too low")
	ErrNoTopics             = errors.New("missing topic(s)")
)

List of errors

View Source 
var DefaultConfig = Config{
	MaxMessageSize:           common.DefaultMaxMessageSize,
	MinimumAcceptedPoW:       common.DefaultMinimumPoW,
	RestrictLightClientsConn: true,
}

Functions

func CreateMailServerEvent 

func CreateMailServerEvent(nodeID enode.ID, payload []byte) (*common.EnvelopeEvent, error)

CreateMailServerEvent returns EnvelopeEvent with correct data if payload corresponds to any of the know mailserver events: * request completed successfully * request failed If the payload is unknown/unparseable, it returns `nil`

func CreateMailServerRequestCompletedPayload 

func CreateMailServerRequestCompletedPayload(requestID, lastEnvelopeHash gethcommon.Hash, cursor []byte) []byte

CreateMailServerRequestCompletedPayload creates a payload representing a successful request to mailserver

func CreateMailServerRequestFailedPayload 

func CreateMailServerRequestFailedPayload(requestID gethcommon.Hash, err error) []byte

CreateMailServerRequestFailedPayload creates a payload representing a failed request to a mailserver

Types

type Bridge 

type Bridge interface {
	Pipe() (<-chan *common.Envelope, chan<- *common.Envelope)
}

type Config 

type Config struct {
	MaxMessageSize           uint32   `toml:",omitempty"`
	MinimumAcceptedPoW       float64  `toml:",omitempty"`
	BloomFilterMode          bool     `toml:",omitempty"` // when true, we only match against bloom filter
	LightClient              bool     `toml:",omitempty"` // when true, it does not forward messages
	FullNode                 bool     `toml:",omitempty"` // when true, it forwards all messages
	RestrictLightClientsConn bool     `toml:",omitempty"` // when true, do not accept light client as peers if it is a light client itself
	EnableConfirmations      bool     `toml:",omitempty"` // when true, sends message confirmations
	SoftBlacklistedPeerIDs   []string `toml:",omitempty"`
}

Config represents the configuration state of a waku node.

type Criteria 

type Criteria struct {
	SymKeyID     string             `json:"symKeyID"`
	PrivateKeyID string             `json:"privateKeyID"`
	Sig          []byte             `json:"sig"`
	MinPow       float64            `json:"minPow"`
	Topics       []common.TopicType `json:"topics"`
	AllowP2P     bool               `json:"allowP2P"`
}

Criteria holds various filter options for inbound messages.

type Info 

type Info struct {
	Messages       int     `json:"messages"`       // Number of floating messages.
	MinPow         float64 `json:"minPow"`         // Minimal accepted PoW
	MaxMessageSize uint32  `json:"maxMessageSize"` // Maximum accepted message size
}

Info contains diagnostic information.

type MailServer 

type MailServer interface {
	Archive(env *common.Envelope)
	DeliverMail(peerID []byte, request *common.Envelope) // DEPRECATED; use Deliver()
	Deliver(peerID []byte, request common.MessagesRequest)
}

MailServer represents a mail server, capable of archiving the old messages for subsequent delivery to the peers. Any implementation must ensure that both functions are thread-safe. Also, they must return ASAP. DeliverMail should use p2pMessageCode for delivery, in order to bypass the expiry checks.

type MailServerResponse 

type MailServerResponse struct {
	LastEnvelopeHash gethcommon.Hash
	Cursor           []byte
	Error            error
}

MailServerResponse is the response payload sent by the mailserver.

type Message 

type Message struct {
	Sig       []byte           `json:"sig,omitempty"`
	TTL       uint32           `json:"ttl"`
	Timestamp uint32           `json:"timestamp"`
	Topic     common.TopicType `json:"topic"`
	Payload   []byte           `json:"payload"`
	Padding   []byte           `json:"padding"`
	PoW       float64          `json:"pow"`
	Hash      []byte           `json:"hash"`
	Dst       []byte           `json:"recipientPublicKey,omitempty"`
	P2P       bool             `json:"bool,omitempty"`
}

Message is the RPC representation of a waku message.

func ToWakuMessage 

func ToWakuMessage(message *common.ReceivedMessage) *Message

ToWakuMessage converts an internal message into an API version.

type NewMessage 

type NewMessage struct {
	SymKeyID   string           `json:"symKeyID"`
	PublicKey  []byte           `json:"pubKey"`
	Sig        string           `json:"sig"`
	TTL        uint32           `json:"ttl"`
	Topic      common.TopicType `json:"topic"`
	Payload    []byte           `json:"payload"`
	Padding    []byte           `json:"padding"`
	PowTime    uint32           `json:"powTime"`
	PowTarget  float64          `json:"powTarget"`
	TargetPeer string           `json:"targetPeer"`
}

NewMessage represents a new waku message that is posted through the RPC.

type PublicWakuAPI 

type PublicWakuAPI struct {
	// contains filtered or unexported fields
}

PublicWakuAPI provides the waku RPC service that can be use publicly without security implications.

func NewPublicWakuAPI 

func NewPublicWakuAPI(w *Waku) *PublicWakuAPI

NewPublicWakuAPI create a new RPC waku service.

func (*PublicWakuAPI) AddPrivateKey 

func (api *PublicWakuAPI) AddPrivateKey(ctx context.Context, privateKey hexutil.Bytes) (string, error)

AddPrivateKey imports the given private key.

func (*PublicWakuAPI) AddSymKey 

func (api *PublicWakuAPI) AddSymKey(ctx context.Context, key hexutil.Bytes) (string, error)

AddSymKey import a symmetric key. It returns an ID that can be used to refer to the key. Can be used encrypting and decrypting messages where the key is known to both parties.

func (*PublicWakuAPI) CancelLightClient 

func (api *PublicWakuAPI) CancelLightClient(ctx context.Context) bool

CancelLightClient cancels light client mode.

func (*PublicWakuAPI) DeleteKeyPair 

func (api *PublicWakuAPI) DeleteKeyPair(ctx context.Context, key string) (bool, error)

DeleteKeyPair removes the key with the given key if it exists.

func (*PublicWakuAPI) DeleteMessageFilter 

func (api *PublicWakuAPI) DeleteMessageFilter(id string) (bool, error)

DeleteMessageFilter deletes a filter.

func (*PublicWakuAPI) DeleteSymKey 

func (api *PublicWakuAPI) DeleteSymKey(ctx context.Context, id string) bool

DeleteSymKey deletes the symmetric key that is associated with the given id.

func (*PublicWakuAPI) GenerateSymKeyFromPassword 

func (api *PublicWakuAPI) GenerateSymKeyFromPassword(ctx context.Context, passwd string) (string, error)

GenerateSymKeyFromPassword derive a key from the given password, stores it, and returns its ID.

func (*PublicWakuAPI) GetFilterMessages 

func (api *PublicWakuAPI) GetFilterMessages(id string) ([]*Message, error)

GetFilterMessages returns the messages that match the filter criteria and are received between the last poll and now.

func (*PublicWakuAPI) GetPrivateKey 

func (api *PublicWakuAPI) GetPrivateKey(ctx context.Context, id string) (hexutil.Bytes, error)

GetPrivateKey returns the private key associated with the given key. The key is the hex encoded representation of a key in the form specified in section 4.3.6 of ANSI X9.62.

func (*PublicWakuAPI) GetPublicKey 

func (api *PublicWakuAPI) GetPublicKey(ctx context.Context, id string) (hexutil.Bytes, error)

GetPublicKey returns the public key associated with the given key. The key is the hex encoded representation of a key in the form specified in section 4.3.6 of ANSI X9.62.

func (*PublicWakuAPI) GetSymKey 

func (api *PublicWakuAPI) GetSymKey(ctx context.Context, id string) (hexutil.Bytes, error)

GetSymKey returns the symmetric key associated with the given id.

func (*PublicWakuAPI) HasKeyPair 

func (api *PublicWakuAPI) HasKeyPair(ctx context.Context, id string) bool

HasKeyPair returns an indication if the node has a key pair that is associated with the given id.

func (*PublicWakuAPI) HasSymKey 

func (api *PublicWakuAPI) HasSymKey(ctx context.Context, id string) bool

HasSymKey returns an indication if the node has a symmetric key associated with the given key.

func (*PublicWakuAPI) Info 

func (api *PublicWakuAPI) Info(ctx context.Context) Info

Info returns diagnostic information about the waku node.

func (*PublicWakuAPI) MakeLightClient 

func (api *PublicWakuAPI) MakeLightClient(ctx context.Context) bool

MakeLightClient turns the node into light client, which does not forward any incoming messages, and sends only messages originated in this node.

func (*PublicWakuAPI) MarkTrustedPeer 

func (api *PublicWakuAPI) MarkTrustedPeer(ctx context.Context, url string) (bool, error)

MarkTrustedPeer marks a peer trusted, which will allow it to send historic (expired) messages. Note: This function is not adding new nodes, the node needs to exists as a peer.

func (*PublicWakuAPI) Messages 

func (api *PublicWakuAPI) Messages(ctx context.Context, crit Criteria) (*rpc.Subscription, error)

Messages set up a subscription that fires events when messages arrive that match the given set of criteria.

func (*PublicWakuAPI) NewKeyPair 

func (api *PublicWakuAPI) NewKeyPair(ctx context.Context) (string, error)

NewKeyPair generates a new public and private key pair for message decryption and encryption. It returns an ID that can be used to refer to the keypair.

func (*PublicWakuAPI) NewMessageFilter 

func (api *PublicWakuAPI) NewMessageFilter(req Criteria) (string, error)

NewMessageFilter creates a new filter that can be used to poll for (new) messages that satisfy the given criteria.

func (*PublicWakuAPI) NewSymKey 

func (api *PublicWakuAPI) NewSymKey(ctx context.Context) (string, error)

NewSymKey generate a random symmetric key. It returns an ID that can be used to refer to the key. Can be used encrypting and decrypting messages where the key is known to both parties.

func (*PublicWakuAPI) Post 

func (api *PublicWakuAPI) Post(ctx context.Context, req NewMessage) (hexutil.Bytes, error)

Post posts a message on the Waku network. returns the hash of the message in case of success.

func (*PublicWakuAPI) SetBloomFilter 

func (api *PublicWakuAPI) SetBloomFilter(ctx context.Context, bloom hexutil.Bytes) (bool, error)

SetBloomFilter sets the new value of bloom filter, and notifies the peers.

func (*PublicWakuAPI) SetMaxMessageSize 

func (api *PublicWakuAPI) SetMaxMessageSize(ctx context.Context, size uint32) (bool, error)

SetMaxMessageSize sets the maximum message size that is accepted. Upper limit is defined by MaxMessageSize.

func (*PublicWakuAPI) SetMinPoW 

func (api *PublicWakuAPI) SetMinPoW(ctx context.Context, pow float64) (bool, error)

SetMinPoW sets the minimum PoW, and notifies the peers.

func (*PublicWakuAPI) UninstallFilter 

func (api *PublicWakuAPI) UninstallFilter(id string)

UninstallFilter is alias for Unsubscribe

func (*PublicWakuAPI) Unsubscribe 

func (api *PublicWakuAPI) Unsubscribe(id string)

Unsubscribe disables and removes an existing filter.

type Waku 

type Waku struct {
	// contains filtered or unexported fields
}

Waku represents a dark communication interface through the Ethereum network, using its very own P2P communication layer.

func New 

func New(cfg *Config, logger *zap.Logger) *Waku

New creates a Waku client ready to communicate through the Ethereum P2P network.

func (*Waku) APIs 

func (w *Waku) APIs() []rpc.API

APIs returns the RPC descriptors the Waku implementation offers

func (*Waku) AddKeyPair 

func (w *Waku) AddKeyPair(key *ecdsa.PrivateKey) (string, error)

AddKeyPair imports a asymmetric private key and returns it identifier.

func (*Waku) AddSymKey 

func (w *Waku) AddSymKey(id string, key []byte) (string, error)

AddSymKey stores the key with a given id.

func (*Waku) AddSymKeyDirect 

func (w *Waku) AddSymKeyDirect(key []byte) (string, error)

AddSymKeyDirect stores the key, and returns its id.

func (*Waku) AddSymKeyFromPassword 

func (w *Waku) AddSymKeyFromPassword(password string) (string, error)

AddSymKeyFromPassword generates the key from password, stores it, and returns its id.

func (*Waku) AllowP2PMessagesFromPeer 

func (w *Waku) AllowP2PMessagesFromPeer(peerID []byte) error

AllowP2PMessagesFromPeer marks specific peer trusted, which will allow it to send historic (expired) messages.

func (*Waku) BloomFilter 

func (w *Waku) BloomFilter() []byte

BloomFilter returns the aggregated bloom filter for all the topics of interest. The nodes are required to send only messages that match the advertised bloom filter. If a message does not match the bloom, it will tantamount to spam, and the peer will be disconnected.

func (*Waku) BloomFilterMode 

func (w *Waku) BloomFilterMode() bool

BloomFilterMode returns whether the node is running in bloom filter mode

func (*Waku) BloomFilterTolerance 

func (w *Waku) BloomFilterTolerance() []byte

BloomFilterTolerance returns the bloom filter which is tolerated for a limited time after new bloom was advertised to the peers. If sufficient time have elapsed or no change of bloom filter have ever occurred, the return value will be the same as return value of BloomFilter().

func (*Waku) BytesRateLimits added in v0.55.1 

func (w *Waku) BytesRateLimits() common.RateLimits

BytesRateLimiting returns RateLimits information for bytes

func (*Waku) ConfirmationsEnabled 

func (w *Waku) ConfirmationsEnabled() bool

ConfirmationsEnabled returns true if message confirmations are enabled.

func (*Waku) CurrentTime 

func (w *Waku) CurrentTime() time.Time

CurrentTime returns current time.

func (*Waku) DeleteKeyPair 

func (w *Waku) DeleteKeyPair(key string) bool

DeleteKeyPair deletes the specified key if it exists.

func (*Waku) DeleteKeyPairs 

func (w *Waku) DeleteKeyPairs() error

DeleteKeyPairs removes all cryptographic identities known to the node

func (*Waku) DeleteSymKey 

func (w *Waku) DeleteSymKey(id string) bool

DeleteSymKey deletes the key associated with the name string if it exists.

func (*Waku) Envelopes 

func (w *Waku) Envelopes() []*common.Envelope

Envelopes retrieves all the messages currently pooled by the node.

func (*Waku) FullNode added in v0.59.0 

func (w *Waku) FullNode() bool

func (*Waku) GenerateSymKey 

func (w *Waku) GenerateSymKey() (string, error)

GenerateSymKey generates a random symmetric key and stores it under id, which is then returned. Will be used in the future for session key exchange.

func (*Waku) GetEnvelope 

func (w *Waku) GetEnvelope(hash gethcommon.Hash) *common.Envelope

GetEnvelope retrieves an envelope from the message queue by its hash. It returns nil if the envelope can not be found.

func (*Waku) GetFilter 

func (w *Waku) GetFilter(id string) *common.Filter

GetFilter returns the filter by id.

func (*Waku) GetPrivateKey 

func (w *Waku) GetPrivateKey(id string) (*ecdsa.PrivateKey, error)

GetPrivateKey retrieves the private key of the specified identity.

func (*Waku) GetSymKey 

func (w *Waku) GetSymKey(id string) ([]byte, error)

GetSymKey returns the symmetric key associated with the given id.

func (*Waku) HandlePeer 

func (w *Waku) HandlePeer(peer common.Peer, rw p2p.MsgReadWriter) error

HandlePeer is called by the underlying P2P layer when the waku sub-protocol connection is negotiated.

func (*Waku) HasKeyPair 

func (w *Waku) HasKeyPair(id string) bool

HasKeyPair checks if the waku node is configured with the private key of the specified public pair.

func (*Waku) HasSymKey 

func (w *Waku) HasSymKey(id string) bool

HasSymKey returns true if there is a key associated with the given id. Otherwise returns false.

func (*Waku) IsEnvelopeCached added in v0.53.0 

func (w *Waku) IsEnvelopeCached(hash gethcommon.Hash) bool

isEnvelopeCached checks if envelope with specific hash has already been received and cached.

func (*Waku) LightClientMode 

func (w *Waku) LightClientMode() bool

LightClientMode indicates is this node is light client (does not forward any messages)

func (*Waku) LightClientModeConnectionRestricted 

func (w *Waku) LightClientModeConnectionRestricted() bool

LightClientModeConnectionRestricted indicates that connection to light client in light client mode not allowed

func (*Waku) Mailserver added in v0.53.0 

func (w *Waku) Mailserver() bool

func (*Waku) MaxMessageSize 

func (w *Waku) MaxMessageSize() uint32

MaxMessageSize returns the maximum accepted message size.

func (*Waku) MinPow 

func (w *Waku) MinPow() float64

MinPow returns the PoW value required by this node.

func (*Waku) MinPowTolerance 

func (w *Waku) MinPowTolerance() float64

MinPowTolerance returns the value of minimum PoW which is tolerated for a limited time after PoW was changed. If sufficient time have elapsed or no change of PoW have ever occurred, the return value will be the same as return value of MinPow().

func (*Waku) NewKeyPair 

func (w *Waku) NewKeyPair() (string, error)

NewKeyPair generates a new cryptographic identity for the client, and injects it into the known identities for message decryption. Returns ID of the new key pair.

func (*Waku) OnBatchAcknowledged added in v0.53.0 

func (w *Waku) OnBatchAcknowledged(batchHash gethcommon.Hash, p common.Peer) error

func (*Waku) OnDeprecatedMessagesRequest added in v0.53.2 

func (w *Waku) OnDeprecatedMessagesRequest(request *common.Envelope, p common.Peer) error

func (*Waku) OnMessagesRequest added in v0.53.0 

func (w *Waku) OnMessagesRequest(request common.MessagesRequest, p common.Peer) error

func (*Waku) OnMessagesResponse added in v0.53.0 

func (w *Waku) OnMessagesResponse(response common.MessagesResponse, p common.Peer) error

func (*Waku) OnNewEnvelopes added in v0.53.0 

func (w *Waku) OnNewEnvelopes(envelopes []*common.Envelope, peer common.Peer) ([]common.EnvelopeError, error)

func (*Waku) OnNewP2PEnvelopes added in v0.53.0 

func (w *Waku) OnNewP2PEnvelopes(envelopes []*common.Envelope) error

func (*Waku) OnP2PRequestCompleted added in v0.53.0 

func (w *Waku) OnP2PRequestCompleted(payload []byte, p common.Peer) error

func (*Waku) PacketRateLimits added in v0.55.1 

func (w *Waku) PacketRateLimits() common.RateLimits

PacketRateLimiting returns RateLimits information for packets

func (*Waku) Protocols 

func (w *Waku) Protocols() []p2p.Protocol

Protocols returns the waku sub-protocols ran by this particular client.

func (*Waku) RegisterBridge 

func (w *Waku) RegisterBridge(b Bridge)

RegisterBridge registers a new Bridge that moves envelopes between different subprotocols. It's important that a bridge is registered before the service is started, otherwise, it won't read and propagate envelopes.

func (*Waku) RegisterMailServer 

func (w *Waku) RegisterMailServer(server MailServer)

RegisterMailServer registers MailServer interface. MailServer will process all the incoming messages with p2pRequestCode.

func (*Waku) RegisterRateLimiter 

func (w *Waku) RegisterRateLimiter(r *common.PeerRateLimiter)

SetRateLimiter registers a rate limiter.

func (*Waku) RequestHistoricMessages 

func (w *Waku) RequestHistoricMessages(peerID []byte, envelope *common.Envelope) error

RequestHistoricMessages sends a message with p2pRequestCode to a specific peer, which is known to implement MailServer interface, and is supposed to process this request and respond with a number of peer-to-peer messages (possibly expired), which are not supposed to be forwarded any further. The waku protocol is agnostic of the format and contents of envelope.

func (*Waku) RequestHistoricMessagesWithTimeout 

func (w *Waku) RequestHistoricMessagesWithTimeout(peerID []byte, envelope *common.Envelope, timeout time.Duration) error

RequestHistoricMessagesWithTimeout acts as RequestHistoricMessages but requires to pass a timeout. It sends an event EventMailServerRequestExpired after the timeout.

func (*Waku) SelectKeyPair 

func (w *Waku) SelectKeyPair(key *ecdsa.PrivateKey) error

SelectKeyPair adds cryptographic identity, and makes sure that it is the only private key known to the node.

func (*Waku) Send 

func (w *Waku) Send(envelope *common.Envelope) error

Send injects a message into the waku send queue, to be distributed in the network in the coming cycles.

func (*Waku) SendEnvelopeEvent added in v0.53.0 

func (w *Waku) SendEnvelopeEvent(event common.EnvelopeEvent) int

func (*Waku) SendHistoricMessageResponse 

func (w *Waku) SendHistoricMessageResponse(peerID []byte, payload []byte) error

func (*Waku) SendMessagesRequest 

func (w *Waku) SendMessagesRequest(peerID []byte, request common.MessagesRequest) error

func (*Waku) SendP2PMessages 

func (w *Waku) SendP2PMessages(peerID []byte, envelopes ...*common.Envelope) error

SendP2PMessage sends a peer-to-peer message to a specific peer. It sends one or more envelopes in a single batch.

func (*Waku) SendRawP2PDirect 

func (w *Waku) SendRawP2PDirect(peerID []byte, envelopes ...rlp.RawValue) error

SendRawP2PDirect sends a peer-to-peer message to a specific peer. It sends one or more envelopes in a single batch.

func (*Waku) SetBloomFilter 

func (w *Waku) SetBloomFilter(bloom []byte) error

SetBloomFilter sets the new bloom filter

func (*Waku) SetBloomFilterMode 

func (w *Waku) SetBloomFilterMode(mode bool)

func (*Waku) SetFullNode added in v0.59.0 

func (w *Waku) SetFullNode(set bool)

func (*Waku) SetLightClientMode 

func (w *Waku) SetLightClientMode(v bool)

SetLightClientMode makes node light client (does not forward any messages)

func (*Waku) SetMaxMessageSize 

func (w *Waku) SetMaxMessageSize(size uint32) error

SetMaxMessageSize sets the maximal message size allowed by this node

func (*Waku) SetMinimumPoW 

func (w *Waku) SetMinimumPoW(val float64, tolerate bool) error

SetMinimumPoW sets the minimal PoW required by this node

func (*Waku) SetTimeSource 

func (w *Waku) SetTimeSource(timesource func() time.Time)

SetTimeSource assigns a particular source of time to a waku object.

func (*Waku) SetTopicInterest 

func (w *Waku) SetTopicInterest(topicInterest []common.TopicType) error

SetTopicInterest sets the new topicInterest

func (*Waku) Start 

func (w *Waku) Start(*p2p.Server) error

Start implements node.Service, starting the background data propagation thread of the Waku protocol.

func (*Waku) Stop 

func (w *Waku) Stop() error

Stop implements node.Service, stopping the background data propagation thread of the Waku protocol.

func (*Waku) Subscribe 

func (w *Waku) Subscribe(f *common.Filter) (string, error)

Subscribe installs a new message handler used for filtering, decrypting and subsequent storing of incoming messages.

func (*Waku) SubscribeEnvelopeEvents 

func (w *Waku) SubscribeEnvelopeEvents(events chan<- common.EnvelopeEvent) event.Subscription

SubscribeEnvelopeEvents subscribes to envelopes feed. In order to prevent blocking waku producers events must be amply buffered.

func (*Waku) TopicInterest 

func (w *Waku) TopicInterest() []common.TopicType

TopicInterest returns the all the topics of interest. The nodes are required to send only messages that match the advertised topics. If a message does not match the topic-interest, it will tantamount to spam, and the peer will be disconnected.

func (*Waku) Unsubscribe 

func (w *Waku) Unsubscribe(id string) error

Unsubscribe removes an installed message handler. TODO: This does not seem to update the bloom filter, but does update the topic interest map

func (*Waku) UnsubscribeMany added in v0.69.0 

func (w *Waku) UnsubscribeMany(ids []string) error

Unsubscribe removes an installed message handler. TODO: This does not seem to update the bloom filter, but does update the topic interest map

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