void onBlocksDownloaded(Peer peer, Block block, @Nullable FilteredBlock filteredBlock, int blocksLeft)
Called on a Peer thread when a block is received.
The block may be a Block object that contains transactions, a Block object that is only a header when fast catchup is being used. If set, filteredBlock can be used to retrieve the list of associated transactions.
peer- the peer receiving the block
block- the downloaded block
filteredBlock- if non-null, the object that wraps the block header passed as the block param.
blocksLeft- the number of blocks left to download