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fix winner math

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This commit is contained in:
Łukasz Magiera 2019-12-03 00:18:27 +01:00
parent fd92b8f19a
commit adcda68d62
1 changed files with 2 additions and 2 deletions
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4
chain/types/blockheader.go
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@ -191,15 +191,15 @@ func IsTicketWinner(partialTicket []byte, ssizeI uint64, totpow BigInt) bool {
lhs := BigFromBytes(h[:]).Int lhs := BigFromBytes(h[:]).Int
lhs = lhs.Mul(lhs, totpow.Int) lhs = lhs.Mul(lhs, totpow.Int)
lhs = lhs.Mul(lhs, big.NewInt(build.SectorChallengeRatioDiv))
// rhs = sectorSize * 2^256 // rhs = sectorSize * 2^256
// rhs = sectorSize << 256 // rhs = sectorSize << 256
rhs := new(big.Int).Lsh(ssize.Int, sha256bits) rhs := new(big.Int).Lsh(ssize.Int, sha256bits)
rhs = rhs.Mul(rhs, big.NewInt(build.SectorChallengeRatioDiv))
rhs = rhs.Mul(rhs, blocksPerEpoch.Int) rhs = rhs.Mul(rhs, blocksPerEpoch.Int)
// h(vrfout) * totalPower < e * sectorSize * 2^256? // h(vrfout) * totalPower < e * sectorSize * 2^256?
return lhs.Cmp(rhs) == -1 return lhs.Cmp(rhs) < 0
} }
func (t *Ticket) Equals(ot *Ticket) bool { func (t *Ticket) Equals(ot *Ticket) bool {