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Merge pull request #515 from steven004/weight

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minor weight function change
This commit is contained in:
Łukasz Magiera 2019-11-09 01:04:50 +01:00 committed by GitHub
commit 28367c5ba1
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2 changed files with 10 additions and 8 deletions
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6
build/params.go
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@ -103,8 +103,10 @@ const FilecoinPrecision = 1_000_000_000_000_000_000
// Blocks
const HalvingPeriodBlocks = 6 * 365 * 24 * 60 * 2
// Blocks
const AdjustmentPeriod = 7 * 24 * 60 * 2
// constants for Weight calculation
// The ratio of weight contributed by short-term vs long-term factors in a given round
const WRatioNum = int64(1)
const WRatioDen = 2
// TODO: Move other important consts here

12
chain/store/weight.go
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@ -37,17 +37,17 @@ func (cs *ChainStore) Weight(ctx context.Context, ts *types.TipSet) (types.BigIn
tpow := types.BigFromBytes(ret.Return)
if tpow.GreaterThan(zero) {
log2P = int64(tpow.BitLen() - 1)
} else {
// Not really expect to be here ...
return types.EmptyInt, xerrors.Errorf("All power in the net is gone. You network might be disconnected, or the net is dead!")
}
out.Add(out, big.NewInt(log2P*256))
out.Add(out, big.NewInt(log2P << 8))
// (wFunction(totalPowerAtTipset(ts)) * len(ts.blocks) * wRatio_num * 2^8) / (e * wRatio_den)
wRatioNum := int64(1)
wRatioDen := 2
eWeight := big.NewInt((log2P * int64(len(ts.Blocks())) * wRatioNum) << 8)
eWeight.Div(eWeight, big.NewInt(int64(build.BlocksPerEpoch*wRatioDen)))
eWeight := big.NewInt((log2P * int64(len(ts.Blocks())) * build.WRatioNum) << 8)
eWeight.Div(eWeight, big.NewInt(int64(build.BlocksPerEpoch * build.WRatioDen)))
out.Add(out, eWeight)
return types.BigInt{Int: out}, nil