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Improve amendment processing and activation logic:

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* The amendment ballot counting code contained a minor technical
  flaw, caused by the use of integer arithmetic and rounding
  semantics, that could allow amendments to reach majority with
  slightly less than 80% support. This commit introduces an
  amendment which, if enabled, will ensure that activation
  requires at least 80% support.
* This commit also introduces a configuration option to adjust
  the amendment activation hysteresis. This option is useful on
  test networks, but should not be used on the main network as
  is a network-wide consensus parameter that should not be
  changed on a per-server basis; doing so can result in a
  hard-fork.

Fixes #3396
This commit is contained in:
Gregory Tsipenyuk
2020-05-18 17:40:53 -04:00
committed by Nik Bougalis
parent fe9922d654
commit df29e98ea5
12 changed files with 320 additions and 120 deletions
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4
src/ripple/protocol/Feature.h
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@@ -111,7 +111,8 @@ class FeatureCollections
"RequireFullyCanonicalSig",
"fix1781", // XRPEndpointSteps should be included in the circular
// payment check
"HardenedValidations"};
"HardenedValidations",
"fixAmendmentMajorityCalc"}; // Fix Amendment majority calculation
std::vector<uint256> features;
boost::container::flat_map<uint256, std::size_t> featureToIndex;
@@ -367,6 +368,7 @@ extern uint256 const fixQualityUpperBound;
extern uint256 const featureRequireFullyCanonicalSig;
extern uint256 const fix1781;
extern uint256 const featureHardenedValidations;
extern uint256 const fixAmendmentMajorityCalc;
} // namespace ripple