Dice Originals — Mines · Limbo · Plinko · Keno

The four Entropy dice games share one money model with Crash: bets are crash chips (shared crash_chips ledger, ETH 18dp / USDG 6dp), debited at bet, credited at settle. Every bet draws a fresh server seed; keccak(seed) is stored alongside the result so any settled row can be audited — recompute the outcome from the stored seed, and the hash proves the row wasn’t rewritten.

Shared economics

Property	Value
Currencies	ETH (18dp) + USDG (6dp)
ETH bet bounds	0.00005 – 0.05 ETH
USDG bet bounds	0.01 – 500 USDG
RTP	≈ 99% by construction for all four games
House edge	1%
Fairness	per-bet server seed; `keccak(seed)` persisted with the result

ENTROPY_MIN_BET_ETH / ENTROPY_MAX_BET_ETH / ENTROPY_MIN_BET_USDG / ENTROPY_MAX_BET_USDG

Fee routing mirrors the crash side: realized edge accrues in the bank and flows to the same sinks (VIP pots + LP treasury) through routeEdge().

Mines — single pick, M mines on a 5×5 grid

25 tiles, M mines (1–24). One pick.
P(win) = (25 − M) / 25
payout multiplier = 0.99 × 25 / (25 − M)     // 1% edge, exact

Mines	Win chance	Multiplier
3	88.0%	1.125×
5	80.0%	1.238×
10	60.0%	1.650×
24	4.0%	24.750×

Mine positions are drawn with sampleDistinct (Fisher–Yates partial shuffle over the seed stream) — uniformly distinct positions, verifiable from the stored seed.

Limbo — target the multiplier

u = uniform(0,1) from the seed
result = 0.99 / (1 − u), clamped to [1.00, 1_000_000]
win ⇔ result ≥ target

Same structure as Crash’s formula with a 1% edge and a 1,000,000× ceiling:

Target	Win chance	Payout
2×	49.5%	2.00×
10×	9.9%	10.00×
100×	0.99%	100.00×
10,000×	0.0099%	10,000.00×

Plinko — 16-row binomial drop

16 rows of pegs; ball direction per row = fair bit from the seed stream.
Bucket = Binomial(16, ½) — center-heavy distribution.
Payouts per risk table (low / medium / high); each row's EV = 0.99.

The multiplier tables are shipped in the API config (GET /api/entropy → plinkoTables) so clients render exactly what the engine pays. Extreme buckets (edges of the 17-bucket row) carry the huge multipliers (up to 170×/1000× on high risk); the center buckets pay fractions of a stake.

Keno — pick up to 10 of 40

40 numbers, 10 drawn. Player picks k numbers (1–10).
Hits h ~ Hypergeometric(40, 10, k); paytable per k, EV = 0.99.

Top multipliers are hit at extreme tails — 10/10 hits pays the table maximum (~238× at pick-10 in the current table). The full paytables ship in the API config.

Verification walkthrough

For any settled bet:

Fetch the row (API exposes seedHash, seed after settle, plus full result meta).
Check keccak(seed) === seedHash.
Re-run the engine function on (seed, bet params) — pure, deterministic, and the same code path the settle used.
Confirm the payout matches the derived outcome × the paytable.

The same popup used for Crash (shared vfair-verify component) runs this flow for all four games — one aligned theme, no white-page verification. Next: Lootboxes.

Overview

Payment Structures

Casino Economy

Earn & Lending

Monetization

Reference

Entropy Games

Dice Originals — Mines · Limbo · Plinko · Keno

Shared economics

Mines — single pick, M mines on a 5×5 grid

Limbo — target the multiplier

Plinko — 16-row binomial drop

Keno — pick up to 10 of 40

Verification walkthrough

​Dice Originals — Mines · Limbo · Plinko · Keno

​Shared economics

​Mines — single pick, M mines on a 5×5 grid

​Limbo — target the multiplier

​Plinko — 16-row binomial drop

​Keno — pick up to 10 of 40

​Verification walkthrough

Dice Originals — Mines · Limbo · Plinko · Keno

Shared economics

Mines — single pick, M mines on a 5×5 grid

Limbo — target the multiplier

Plinko — 16-row binomial drop

Keno — pick up to 10 of 40

Verification walkthrough