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Other contracts in detail

JuuJackpot

  • commit(epoch, hash) (keeper): before the epoch ends.
  • MUSDash.checkpoint(epoch) (anyone): after it ends, seals the tickets and records the seal block.
  • reveal(epoch, secret) (anyone with the secret): between seal block + 2 and seal block + 256. Winning ticket = keccak256(secret, blockhash(sealBlock + 1)) mod totalTickets. Prize = Buffer balance above target(), which is 5% of all open position size.
  • skip(epoch): after a missed reveal window or with no commit. The surplus stays.
  • For positions held by the Agent Gateway, the prize goes to gateway.positionUser(id).

JuuBuffer (v2)

coverBadDebt (MUSDash only) and payJackpot (Jackpot only). Receives fees and penalties as plain MUSD transfers.

JuuLoop

  • setLoop(on, seriesId): eligible if the caller holds that series' P or Y and the series is Open.
  • loopWinnings(user, amount): MUSDash and the Agent Gateway only. Swaps MUSD to BTC on Mezo's Router with minOut = amount / price x (1 - maxSlippage) (12% on testnet), then Splitter.zap{value}(series, user). On any failure the user gets the MUSD (or the BTC if only the zap failed).

JuuPMarket

createPool(seriesId), poolOf, priceOfP (BTC per P from reserves), impliedReturn (fixed return to the end date and seconds left), quoteBuy, buyP(seriesId, minPOut) with plain BTC, sellP(seriesId, amount, minBtcOut). Pools are Mezo DEX volatile pools.

JuuSavingsSplitter (Door 2)

  • deposit(seriesId, amount): sMUSD in, P and Y out 1:1.
  • Yield: on every deposit, harvest and claim, the contract claims sMUSD's yield and books each series' share as principal x (yieldIndex now - yieldIndex last booked), the same formula sMUSD uses for holders.
  • claimY, mature (after the end date: withdraws the series' sMUSD as MUSD), redeemP (1 P for 1 MUSD).

JuuAccount and JuuAccountFactory (Door 3)

  • JuuAccountFactory.create() makes one account per user, owned only by them.
  • Owner: openTrove(debt) with BTC, addCollateral, borrow, repay, withdrawCollateral (must stay 0.2 above the guard ratio), withdrawMUSD, closeTrove (no open bets), play(side, floor, margin), moveFloor, close, setGuard(icr, tcr) (at least 120% and 150%).
  • play borrows what it needs and refuses if chips in play would exceed capacity() (80% of net worth) or the trove would fall below the guard ratio + 10%.
  • On close: returned chips repay debt (down to Mezo's minimum loan); profit is swapped to BTC and added as collateral, or repays debt if the swap would lose more than 12%.
  • guard(maxCloses) (anyone, when shouldGuard()): trove ratio below guardICR (130%) or Mezo's system ratio below guardTCR (160%). Closes up to maxCloses bets; the keeper calls guard(1) with a fixed 9.5 million gas limit and repeats each minute, because one close costs 4 to 6 million gas on Mezo and the block limit is 10 million. (An earlier version closed all bets in one call; with gas estimation, the inner closes ran out of gas and were skipped.) sync() drops bets that collapsed.
  • Mezo fixes a trove's borrowing cap at opening; borrow refinances first when needed.