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