Block Sync

Channel

Block sync has one channel.

Name	Number
BlocksyncChannel	64

Message Types

There are multiple message types for Block Sync

BlockRequest

BlockRequest asks a peer for a block at the height specified.

Name	Type	Description	Field Number
Height	int64	Height of requested block	1

NoBlockResponse

NoBlockResponse notifies the peer requesting a block that the node does not contain it.

Name	Type	Description	Field Number
Height	int64	Height of requested block	1

BlockResponse

BlockResponse contains the block requested. It also contains an extended commit iff vote extensions are enabled at the block’s height.

Name	Type	Description	Field Number
Block	Block	Requested Block	1
ExtCommit	ExtendedCommit	Sender’s LastCommit information	2

StatusRequest

StatusRequest is an empty message that notifies the peer to respond with the highest and lowest blocks it has stored.

Empty message.

StatusResponse

StatusResponse responds to a peer with the highest and lowest heights of any block it has in its blockstore.

Name	Type	Description	Field Number
Height	int64	Current Height of a node	1
Base	int64	First known block, if pruning is enabled it will be higher than 1	2

Message

Message is a oneof protobuf type. The oneof consists of five messages.

Name	Type	Description	Field Number
block_request	BlockRequest	Request a block from a peer	1
no_block_response	NoBlockResponse	Response saying it doe snot have the requested block	2
block_response	BlockResponse	Response with requested block + (optionally) vote extensions	3
status_request	StatusRequest	Request the highest and lowest block numbers from a peer	4
status_response	StatusResponse	Response with the highest and lowest block numbers the store	5