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util: Enhance ETTS calculation #1973

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jamescowens
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@jamescowens jamescowens commented Nov 16, 2020

This PR implements a two step process for computing the underlying difficulty used for the GetEstimatedTimetoStake function.

This is meant to address the matching of the appropriate span to use for the difficulty calculation compared to the ETTS (which is a coupled problem). For low balance holders, a long (up to 960 block) averaging interval should be used to compute the difficulty for estimating ETTS, since if someone has an ETTS of 1 month, it makes no sense to be changing that estimate based on difficulty changes during the last hour. Conversely, if someone is staking 6 times a day, a much shorter span for the difficulty is appropriate since changes in the network difficulty should be reflected very quickly with staking frequency.

@jamescowens jamescowens added this to the Hilda milestone Nov 16, 2020
@jamescowens jamescowens self-assigned this Nov 16, 2020
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I wonder if I should write a clamp template in util.cpp? We use clamps in a few places...

This commit implements a two step process for computing the
underlying difficulty used for the GetEstimatedTimetoStake function.

This is meant to address the matching of the appropriate span to
use for the difficulty calculation compared to the ETTS (which is
a coupled problem). For low balance holders, a long (960 block)
averaging interval should be used to compute the difficulty
for estimating ETTS, since if someone has an ETTS of 1 month, it
makes no sense to be changing that estimate based on difficulty
changes during the last hour. Conversely, if someone is staking
6 times a day, a much shorter span for the difficulty is appropriate
since changes in the network difficulty will be reflected very
quickly with staking frequency.
@jamescowens jamescowens merged commit 7556b23 into gridcoin-community:development Nov 20, 2020
@jamescowens jamescowens deleted the ETTS_enhancements branch November 22, 2020 00:58
jamescowens added a commit that referenced this pull request Mar 1, 2021
 Added
 - gui: Add RAC column to wizard summary page projects table #1951 (@cyrossignol)
 - rpc: clean up the superblocks function and add magnitude to getmininginfo #1966 (@jamescowens)
 - rpc: Add transaction size to RPC output #1971 (@cyrossignol)
 - voting: Add user-facing support for poll response types #1976 (@cyrossignol)
 - gui: Port Bitcoin Intro class (implement the ability to choose a data directory via the GUI) #1978 (@jamescowens)
 - gui: Port Bitcoin MacOS app nap manager #1991 (@jamescowens)
 - mining, rpc: Implement staking efficiency measure and improve SelectCoinsForStaking and CreateCoinStake #1992 (@jamescowens)
 - accrual, rpc: Implement auditsnapshotaccruals #2001 (@jamescowens)
 - docs: add doxygen support #2000 (@div72)
 - beacon: Specialized beacon storage in leveldb #2009 (@jamescowens)
 - rpc: Add a call to dump contracts in binary form #2011 (@div72)
 - rpc: Add boolean option to report active beacons only in beaconreport #2013 (@jamescowens)
 - consensus: Set Hilda mainnet hardfork height to 2197000 #2022 (@jamescowens)

 Changed
 - refactor: [Memory optimization] Block index duplicate PoS state #1945 (@cyrossignol)
 - refactor: [Memory optimization] Block index superblock and contract flags #1950 (@cyrossignol)
 - refactor: [Memory optimization] Remove stake modifier checksums #1954 (@cyrossignol)
 - refactor: [Memory optimization] Block index allocation overhead #1957 (@cyrossignol)
 - refactor: [Memory optimization] Remove block index subsidy fields #1960 (@cyrossignol)
 - refactor: [Memory optimization] Separate chain trust from the block index #1961 (@cyrossignol)
 - refactor: [Memory optimization] Eliminate padding between block index fields #1962 (@cyrossignol)
 - beacon, gui: Add check for presence of beacon private key to updateBeacon() #1968 (@jamescowens)
 - util: Enhance ETTS calculation #1973 (@jamescowens)
 - refactor: Use new clamp in util.h #1975 (@jamescowens)
 - gui: Redo global status for overview #1983 (@jamescowens)
 - util: Improvements to MilliTimer class and use in the miner and init #1987 (@jamescowens)
 - rpc: Move rpc files to directory #1995 (@Pythonix)
 - rpc: Enhance consolidateunspent and fix fee calculation #1994 (@jamescowens)
 - contract: Double the lookback scope of contract replay #1998 (@jamescowens)
 - net: Don't rely on external IP resolvers #2002 (@Tetrix42)
 - beacon: Change beacon map to pointers #2008 (@jamescowens)
 - gui: Update bitcoin_sv.ts #2014 (@sweede-se)
 - util: Update snapshot URLs and add accrual directory #2019 (@jamescowens)
 - beacon: Tweak BeaconRegistry::Revert #2020 (@jamescowens)
 - rpc, qt: bump fees @2023 (@div72)

 Removed
 - researcher: Remove automatic legacy beacon key import #1963 (@cyrossignol)
 - util: Revert "Close LevelDB after loading the block index" #1969 (@cyrossignol)
 - ci: Fix python symlink issue & remove travis #1990 (@div72)
 - ci: remove python workaround #2005 (@div72)

 Fixed
 - gui: fix mandatory/leisure detection of upgrade check #1959 (@Pythonix)
 - voting: Fix title in "gettransaction" RPC for legacy poll contracts @1970 (@cyrossignol)
 - gui: Fix missing menu items on macOS #1972 (@scribblemaniac)
 - rpc: Fix answer offset in "votedetails" #1974 (@cyrossignol)
 - voting: Implement missing try-catch in VotingVoteDialog::vote #1980 (@jamescowens)
 - scraper: Add check for minimum housekeeping complete in scraper #1977 (@jamescowens)
 - voting: Fix nonsense vote weights for legacy polls #1988 (@cyrossignol)
 - voting: Fix incorrect field returned in ResolveMoneySupplyForPoll() #1989 (@cyrossignol)
 - consensus, accrual: Fix newbie accrual #2004 (@jamescowens)
 - log: grammar correction #2016 (@nathanielcwm)
 - wallet: Correct nMinFee fee calculation in CreateTransaction #2021 (@jamescowens)
 - rpc, miner: Correct GetLastStake #2026 (@jamescowens)
 - wallet: Fix bug in CreateTransaction causing insufficient fees #2029 (@jamescowens)
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2 participants