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wallet2: refer to triangular distribution for recent zone in comment

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It was wrongly refering to equiprobable distribution, which I think
I'd originally done, but forgot to update the comment after changing
to triangular

Reported by smooth on IRC
This commit is contained in:
moneromooo-monero 2017-04-22 11:21:30 +01:00
parent ac1aba90f8
commit a6d5bb75fe
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 1 additions and 1 deletions
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src/wallet/wallet2.cpp
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@ -3643,7 +3643,7 @@ void wallet2::get_outs(std::vector<std::vector<tools::wallet2::get_outs_entry>>
uint64_t i; uint64_t i;
if (num_found - 1 < recent_outputs_count) // -1 to account for the real one we seeded with if (num_found - 1 < recent_outputs_count) // -1 to account for the real one we seeded with
{ {
// equiprobable distribution over the recent outs // triangular distribution over [a,b) with a=0, mode c=b=up_index_limit
uint64_t r = crypto::rand<uint64_t>() % ((uint64_t)1 << 53); uint64_t r = crypto::rand<uint64_t>() % ((uint64_t)1 << 53);
double frac = std::sqrt((double)r / ((uint64_t)1 << 53)); double frac = std::sqrt((double)r / ((uint64_t)1 << 53));
i = (uint64_t)(frac*num_recent_outs) + num_outs - num_recent_outs; i = (uint64_t)(frac*num_recent_outs) + num_outs - num_recent_outs;