Pump — How to play & pay table

Everything about the game: how it plays, what each combination pays, the RTP, and how every round can be verified on-chain.

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Pump

Fifteen membrane panels. One pump. Fresh cells every bet.

House Edge: 2%

Pump shows one balloon with 15 numbered membrane panels in three rows of five. The button always tests protocol bit 0; there is no panel to choose. Difficulties 1–4 publish 1, 5, 8 or 9 burst cells and pay 1.05×, 1.47×, 2.10× or 2.45× on survival. Every pump is an independent bet paid to balance. The balloon returns to the same resting size after each result.

How to play

Pick a difficulty, then press Pump. There is no cell to choose: every pump tests the same cell of a membrane whose burst cells are scattered again first. A surviving pump pays its gross return into your balance, and pumping again stakes exactly that amount. The balloon returns to its resting size every time, because nothing accumulates between pumps.

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Fairness

Every settlement reveals all 15 panels, including bursts on a loss. A set hazard bit means a burst cell; bit 0 decides the pump. All cells are seeded again for the next bet. The receipt retains the full mask, tested panel, stake and settlement identity. Every difficulty has 98.00% RTP and 2.00% house edge per pump, not per repeated sequence.

Randomness by: Chainlink VRFContract operated by: DODEN.IO

Frequently asked questions

Can I select a membrane panel?: No. Pump always sends choiceValue 0 and tests bit 0, shown as panel 1 at the upper left. The fifteen panels reveal the result; neither they nor the illustrated handle are buttons.
What does each difficulty change?: Difficulties 1–4 have 1, 5, 8 or 9 burst cells out of 15. Survival is 14/15, 10/15, 7/15 or 6/15. A surviving pump returns 1.05×, 1.47×, 2.10× or 2.45× including the stake.
Does a bigger balloon mean higher pressure or better odds?: No pressure accumulates. The balloon only expands briefly after a confirmed win and returns to its fixed resting size. Every pump uses a fresh set of 15 cells; prior intact panels do not protect the next bet.
When do I receive a winning return?: Each pump is an independent bet. A win pays its gross return into balance at settlement. The next Pump button stakes that entire amount again. Keeping it simply means not pressing again; there is no cash-out transaction.
Why are there two multiplier tiles?: The left tile quotes the next pump only. The right shows the latest banked return divided by the opening stake, floored to four decimal places. After that return is re-staked, the tile explicitly becomes historical. Details show every step price and exact paid amount.
What are the betting limits and RTP?: Stake 5–40 USDT per pump, with a 200 USDT per-bet payout cap. Every difficulty has 98.00% RTP and a 2.00% house edge per pump. Each pump in a sequence pays its own edge. A credited return above 40 USDT stays yours; prepare a new local run with a legal stake.
What if I reload or the result takes a long time?: The open-request book restores a pending pump’s string request ID, stake and difficulty. Its new local baseline starts at that pump because earlier wins are absent from the book. An unresolved bet stays locked while you resync. A refund restores the previous sequence; a rescue closes it with its reported payout and no invented burst.
Can I inspect every burst after losing?: Yes. The complete membrane remains visible until preparation of the next bet. Bet details retains all 15 panel statuses, hazardMask, panel 1/protocol index 0, difficulty, stake, gross payout and settlement identity after the membrane is covered.