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[#851] util/rand: use single random source

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It is much more convenient to skip source creation.
Also fix some bugs:
1. `cryptoSource.Int63()` now returns number in [0, 1<<63) as required
   by `rand.Source` interface.
2. Replace `cryptoSource.Uint63()` with `cryptoSource.Uint64` to allow
   generate uint64 numbers directly (see rand.Source64 docs).

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgenii Stratonikov 2022-01-11 17:07:59 +03:00 • committed by Alex Vanin
parent c35cdb3684
commit 5828f43e52
8 changed files with 56 additions and 66 deletions
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3
pkg/innerring/processors/audit/process.go
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@ -69,10 +69,9 @@ func (ap *Processor) processStartAudit(epoch uint64) {
}
n := nodes.Flatten()
crand := rand.New() // math/rand with cryptographic source
// shuffle nodes to ask a random one
crand.Shuffle(len(n), func(i, j int) {
rand.Shuffle(len(n), func(i, j int) {
n[i], n[j] = n[j], n[i]
})