getBlockSignatures2 (14)

The getBlockSignatures2 message is a request sent by a node to a peer to ask for all the signatures it has collected for a particular block.

This message is essential for the consensus mechanism, as it allows nodes that may have missed signature broadcasts to catch up and reach the required signature threshold to freeze a block.

Core Data Types

• IxiVarUInt: See IxiVarInt Encoding.
• IxiBytes: See IxiBytes Encoding.

Payload Structure

Field	Data Type	Min	Max	Description
blockNum	IxiVarUInt	1		The block number for which signatures are being requested.
blockChecksum	IxiBytes			The checksum (hash) of the block for which signatures are being requested.

Behavioral Notes

• A node receiving this message should look up the specified block (blockNum and blockChecksum) in its local database.
• If the block is found, the node should gather all valid signatures it has stored for that block.
• The collected signatures are then sent back to the requesting peer in one or more signaturesChunk2 messages.
• It is not an error if the receiving node has no signatures for the requested block; it would simply not send any signaturesChunk2 response.