Request: Get Data (“getdata”)

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

A GETDATA request is a vector of INV-formatted data.

Message Format

Field	Length	Format	Description
vector length N	variable	compact int	number of items
item 0 type	4 bytes	unsigned int^(LE)	type of the requested object
item 0 hash	32 bytes	bytes	hash of the requested object
...
item N-1 type
item N-1 hash

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

The hash identifier of the desired object.