Is Joker.one written in JAVA language? What interface does Joker use?

JOKER POOL Smart Contract Mining Logic
1. After entering the EOS amount to be mortgaged, the smart contract will display a 0.5% fee reminder, and then transfer the mortgaged EOS to the JOKER POOL betting pool through the smart contract.
Docking V: HL62468
2. Every day, 1% of the mortgaged EOS in the mortgage pool should enter the weight pool to participate in JOKER mining, and the smart contract should calculate the daily personal mining weight ratio once a day at 23:00 PM GMT (Mining throughput per unit equity § = today's entire network mining volume * 100 / today's entire network equity mining volume, today's personal mining volume = unit equity mining throughput § today's personal equity mining volume / 100), then mining The EOS obtained after staked out starts to enter the weighting pool 24 hours later.
The throughput of individual JOKER is calculated as follows:
The daily mining volume of the personal mining weight ratio JOKER POOL (the early daily production capacity was 13,000.0000 JOKER per day.
3. JOKER's production reduction: Once the cumulative mining volume reaches 520,000.0000 JOKER, the next round of daily mining The mining capacity will be reduced by 12%.
4. When the equity value of the entire network reaches 540,000 EOS, the mining system will be triggered.