Enum libp2p_kad::handler::KademliaHandlerEvent

pub enum KademliaHandlerEvent<TUserData> {
    ProtocolConfirmed {
        endpoint: ConnectedPoint,
    },
    FindNodeReq {
        key: Vec<u8>,
        request_id: KademliaRequestId,
    },
    FindNodeRes {
        closer_peers: Vec<KadPeer>,
        user_data: TUserData,
    },
    GetProvidersReq {
        key: Key,
        request_id: KademliaRequestId,
    },
    GetProvidersRes {
        closer_peers: Vec<KadPeer>,
        provider_peers: Vec<KadPeer>,
        user_data: TUserData,
    },
    QueryError {
        error: KademliaHandlerQueryErr,
        user_data: TUserData,
    },
    AddProvider {
        key: Key,
        provider: KadPeer,
    },
    GetRecord {
        key: Key,
        request_id: KademliaRequestId,
    },
    GetRecordRes {
        record: Option<Record>,
        closer_peers: Vec<KadPeer>,
        user_data: TUserData,
    },
    PutRecord {
        record: Record,
        request_id: KademliaRequestId,
    },
    PutRecordRes {
        key: Key,
        value: Vec<u8>,
        user_data: TUserData,
    },
}

Event produced by the Kademlia handler.

Variants

ProtocolConfirmed

Fields

endpoint: ConnectedPoint

The configured protocol name has been confirmed by the peer through a successfully negotiated substream.

This event is only emitted once by a handler upon the first successfully negotiated inbound or outbound substream and indicates that the connected peer participates in the Kademlia overlay network identified by the configured protocol name.

FindNodeReq

Fields

key: Vec<u8>

The key for which to locate the closest nodes.

request_id: KademliaRequestId

Identifier of the request. Needs to be passed back when answering.

Request for the list of nodes whose IDs are the closest to key. The number of nodes returned is not specified, but should be around 20.

FindNodeRes

Fields

closer_peers: Vec<KadPeer>

Results of the request.

user_data: TUserData

The user data passed to the FindNodeReq.

Response to an KademliaHandlerIn::FindNodeReq.

GetProvidersReq

Fields

key: Key

The key for which providers are requested.

request_id: KademliaRequestId

Identifier of the request. Needs to be passed back when answering.

Same as FindNodeReq, but should also return the entries of the local providers list for this key.

GetProvidersRes

Fields

closer_peers: Vec<KadPeer>

Nodes closest to the key.

provider_peers: Vec<KadPeer>

Known providers for this key.

user_data: TUserData

The user data passed to the GetProvidersReq.

Response to an KademliaHandlerIn::GetProvidersReq.

QueryError

Fields

error: KademliaHandlerQueryErr

The error that happened.

user_data: TUserData

The user data passed to the query.

An error happened when performing a query.

AddProvider

Fields

key: Key

The key for which the peer is a provider of the associated value.

provider: KadPeer

The peer that is the provider of the value for key.

The peer announced itself as a provider of a key.

GetRecord

Fields

key: Key

Key for which we should look in the dht

request_id: KademliaRequestId

Identifier of the request. Needs to be passed back when answering.

Request to get a value from the dht records

GetRecordRes

Fields

record: Option<Record>

The result is present if the key has been found

closer_peers: Vec<KadPeer>

Nodes closest to the key.

user_data: TUserData

The user data passed to the GetValue.

Response to a KademliaHandlerIn::GetRecord.

PutRecord

Fields

record: Record

request_id: KademliaRequestId

Identifier of the request. Needs to be passed back when answering.

Request to put a value in the dht records

PutRecordRes

Fields

key: Key

The key of the stored record.

value: Vec<u8>

The value of the stored record.

user_data: TUserData

The user data passed to the PutValue.

Response to a request to store a record.

Trait Implementations

impl<TUserData: Debug> Debug for KademliaHandlerEvent<TUserData>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.