message

type BlockRequest ¶

type BlockRequest struct {
	Hash    common.Hash `serialize:"true"`
	Height  uint64      `serialize:"true"`
	Parents uint16      `serialize:"true"`
}

BlockRequest is a request to retrieve Parents number of blocks starting from Hash from newest-oldest manner

func (b BlockRequest) Handle(ctx context.Context, nodeID ids.NodeID, requestID uint32, handler RequestHandler) ([]byte, error)

func (b BlockRequest) String() string

type BlockResponse ¶

type BlockResponse struct {
	Blocks [][]byte `serialize:"true"`
}

BlockResponse is a response to a BlockRequest Blocks is slice of RLP encoded blocks starting with the block requested in BlockRequest.Hash. The next block is the parent, etc. handler: handlers.BlockRequestHandler

type CodeRequest ¶

type CodeRequest struct {
	// Hashes is a list of contract code hashes
	Hashes []common.Hash `serialize:"true"`
}

CodeRequest is a request to retrieve a contract code with specified Hash

func NewCodeRequest(hashes []common.Hash) CodeRequest

func (c CodeRequest) Handle(ctx context.Context, nodeID ids.NodeID, requestID uint32, handler RequestHandler) ([]byte, error)

func (c CodeRequest) String() string

type CodeResponse ¶

type CodeResponse struct {
	Data [][]byte `serialize:"true"`
}

CodeResponse is a response to a CodeRequest crypto.Keccak256Hash of each element in Data is expected to equal the corresponding element in CodeRequest.Hashes handler: handlers.CodeRequestHandler

type LeafsRequest ¶

type LeafsRequest struct {
	Root    common.Hash `serialize:"true"`
	Account common.Hash `serialize:"true"`
	Start   []byte      `serialize:"true"`
	End     []byte      `serialize:"true"`
	Limit   uint16      `serialize:"true"`
}

LeafsRequest is a request to receive trie leaves at specified Root within Start and End byte range Limit outlines maximum number of leaves to returns starting at Start

func (l LeafsRequest) Handle(ctx context.Context, nodeID ids.NodeID, requestID uint32, handler RequestHandler) ([]byte, error)

func (l LeafsRequest) String() string

type LeafsResponse ¶

type LeafsResponse struct {
	// Keys and Vals provides the key-value pairs in the trie in the response.
	Keys [][]byte `serialize:"true"`
	Vals [][]byte `serialize:"true"`

	// More indicates if there are more leaves to the right of the last value in this response.
	//
	// This is not serialized since it is set in the client after verifying the response via
	// VerifyRangeProof and determining if there are in fact more leaves to the right of the
	// last value in this response.
	More bool `serialize:"-"`

	// ProofVals contain the edge merkle-proofs for the range of keys included in the response.
	// The keys for the proof are simply the keccak256 hashes of the values, so they are not included in the response to save bandwidth.
	ProofVals [][]byte `serialize:"true"`
}

LeafsResponse is a response to a LeafsRequest Keys must be within LeafsRequest.Start and LeafsRequest.End and sorted in lexicographical order.

ProofVals must be non-empty and contain a valid range proof unless the key-value pairs in the response are the entire trie. If the key-value pairs make up the entire trie, ProofVals should be empty since the root will be sufficient to prove that the leaves are included in the trie.

More is a flag set in the client after verifying the response, which indicates if the last key-value pair in the response has any more elements to its right within the trie.

type Manager ¶ added in v0.19.4

type Manager interface {
	Marshal(version uint16, source interface{}) ([]byte, error)
	Unmarshal(bytes []byte, dest interface{}) (uint16, error)
}

Manager is the surface every wire-touching peer of this package needs. It's the smallest method set that lets a caller serialise or parse a message blob — no reflection registry, no codec.Codec sub-interface.

The package singleton Codec implements Manager. Downstream packages (sync/handlers, sync/client, network) should accept Manager in their constructors rather than coupling to a specific concrete type.

var Codec Manager = &manager{maxSize: maxMessageSize}

type NoopRequestHandler ¶

type NoopRequestHandler struct{}

func (NoopRequestHandler) HandleBlockRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, request BlockRequest) ([]byte, error)

func (NoopRequestHandler) HandleCodeRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, codeRequest CodeRequest) ([]byte, error)

func (NoopRequestHandler) HandleStateTrieLeafsRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, leafsRequest LeafsRequest) ([]byte, error)

type Request ¶

type Request interface {
	// Requests should implement String() for logging.
	fmt.Stringer

	// Handle allows `Request` to call respective methods on handler to handle
	// this particular request type
	Handle(ctx context.Context, nodeID ids.NodeID, requestID uint32, handler RequestHandler) ([]byte, error)
}

Request represents a Network request type

type RequestHandler ¶

type RequestHandler interface {
	HandleStateTrieLeafsRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, leafsRequest LeafsRequest) ([]byte, error)
	HandleBlockRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, request BlockRequest) ([]byte, error)
	HandleCodeRequest(ctx context.Context, nodeID ids.NodeID, requestID uint32, codeRequest CodeRequest) ([]byte, error)
}

RequestHandler interface handles incoming requests from peers Must have methods in format of handleType(context.Context, ids.NodeID, uint32, request Type) error so that the Request object of relevant Type can invoke its respective handle method on this struct. Also see GossipHandler for implementation style.

type RequestMarshaler ¶ added in v0.19.4

type RequestMarshaler interface {
	Marshal(version uint16, source interface{}) ([]byte, error)
}

RequestMarshaler is the minimal surface RequestToBytes needs from the package codec. The concrete *manager satisfies it; callers should pass Codec.

type ResponseHandler ¶

type ResponseHandler interface {
	// OnResponse is invoked when the peer responded to a request
	OnResponse(response []byte) error
	// OnFailure is invoked when there was a failure in processing a request
	OnFailure() error
}

ResponseHandler handles response for a sent request Only one of OnResponse or OnFailure is called for a given requestID, not both

type SyncSummary ¶

type SyncSummary struct {
	BlockNumber uint64      `serialize:"true"`
	BlockHash   common.Hash `serialize:"true"`
	BlockRoot   common.Hash `serialize:"true"`
	// contains filtered or unexported fields
}

SyncSummary provides the information necessary to sync a node starting at the given block.

func NewSyncSummary(blockHash common.Hash, blockNumber uint64, blockRoot common.Hash) (SyncSummary, error)

func NewSyncSummaryFromBytes(summaryBytes []byte, acceptImpl func(SyncSummary) (chain.StateSyncMode, error)) (SyncSummary, error)

func (s SyncSummary) Accept(context.Context) (chain.StateSyncMode, error)

func (s SyncSummary) Bytes() []byte

func (s SyncSummary) Height() uint64

func (s SyncSummary) ID() ids.ID

func (s SyncSummary) String() string