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Raffle Algorithm Psudeo Code

$round => the round of wanted raffle datetime.
$url = ‘https://api.drand.sh/8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce/public/{$round}’
$drand = curl $url
$raffle = new BigInteger(bchexdec($drand->randomness))
$count = count($participants)
$winner = $raffle->mod($count) + 1