Measured block propagation delay in seconds. This will determine the
conservative window when we measure confirmation risk internally in
the consensus layer.
The threshold controlling whether a node is in catch-up mode.
A node is in catch-up mode if its local best epoch number is
CATCH_UP_EPOCH_LAG_THRESHOLD behind the median of the epoch
numbers of peers.
The threshold controlling whether we should query local_block_info in
disk when requesting block header or block. If the difference
between height of the block and current best height is less than
LOCAL_BLOCK_INFO_QUERY_THRESHOLD, we can request block directly through
network, otherwise we should check disk first.
The max number of blocks that are to be sent for compact block request.
The max number of epochs whose hashes are to be responded
for request GetBlockHashesByEpoch
The max number of headers that are to be sent for header
block request.
This threshold controlling whether a node should request missing
terminals from peers when the node is in catch-up mode.