specification/protocol/network/messages/getdata.md

{ "title":"GETDATA", "related":["/protocol","/protocol/p2p/inv"] }

Requests information (generally previously announced via an INV) from a peer.

A GETDATA request is formatted as a vector of INV data:

compact int	4 bytes	32 bytes	...	additional objects
vector size N elements of	element 1 type	element 1 hash	...	element N type and hash

Type

The type of the desired object. See INV for specific values

Hash

The hash identifier of the desired object.