forked from LBRYCommunity/lbry-sdk
61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# This library is free software, distributed under the terms of
|
|
# the GNU Lesser General Public License Version 3, or any later version.
|
|
# See the COPYING file included in this archive
|
|
#
|
|
# The docstrings in this module contain epytext markup; API documentation
|
|
# may be created by processing this file with epydoc: http://epydoc.sf.net
|
|
|
|
""" This module defines the charaterizing constants of the Kademlia network
|
|
|
|
C{checkRefreshInterval} and C{udpDatagramMaxSize} are implementation-specific
|
|
constants, and do not affect general Kademlia operation.
|
|
"""
|
|
|
|
######### KADEMLIA CONSTANTS ###########
|
|
|
|
#: Small number Representing the degree of parallelism in network calls
|
|
alpha = 3
|
|
|
|
#: Maximum number of contacts stored in a bucket; this should be an even number
|
|
k = 8
|
|
|
|
#: Maximum number of contacts stored in the replacement cache
|
|
replacementCacheSize = 8
|
|
|
|
#: Timeout for network operations (in seconds)
|
|
rpcTimeout = 5
|
|
|
|
# number of rpc attempts to make before a timeout results in the node being removed as a contact
|
|
rpcAttempts = 5
|
|
|
|
# Delay between iterations of iterative node lookups (for loose parallelism) (in seconds)
|
|
iterativeLookupDelay = rpcTimeout / 2
|
|
|
|
#: If a k-bucket has not been used for this amount of time, refresh it (in seconds)
|
|
refreshTimeout = 3600 # 1 hour
|
|
#: The interval at which nodes replicate (republish/refresh) data they are holding
|
|
replicateInterval = refreshTimeout
|
|
# The time it takes for data to expire in the network; the original publisher of the data
|
|
# will also republish the data at this time if it is still valid
|
|
dataExpireTimeout = 86400 # 24 hours
|
|
|
|
tokenSecretChangeInterval = 300 # 5 minutes
|
|
|
|
######## IMPLEMENTATION-SPECIFIC CONSTANTS ###########
|
|
|
|
#: The interval in which the node should check its whether any buckets need refreshing,
|
|
#: or whether any data needs to be republished (in seconds)
|
|
checkRefreshInterval = refreshTimeout / 5
|
|
|
|
#: Max size of a single UDP datagram, in bytes. If a message is larger than this, it will
|
|
#: be spread across several UDP packets.
|
|
udpDatagramMaxSize = 8192 # 8 KB
|
|
|
|
from lbrynet.core.cryptoutils import get_lbry_hash_obj
|
|
|
|
h = get_lbry_hash_obj()
|
|
key_bits = h.digest_size * 8 # 384 bits
|
|
|
|
rpc_id_length = 20
|