Crypto Casino Glossary: Every Term Used at Duel.com Explained
Every term we use on this site, defined in plain English.
Why this glossary exists
Crypto casino terminology mixes gambling jargon with cryptocurrency vocabulary, and writers often assume readers already understand both. This page defines every term we use on the Duel.com review hub. If you encounter a term we have not defined, write to editor@duelcasinohub.com and we will add it.
Gambling math terms
- RTP (Return-To-Player)
- The percentage of all wagered money that a game pays back over a large enough sample. 96% RTP slot pays out $96 per $100 wagered, on average. Duel Originals run at literal 100% RTP, house keeps nothing. Important nuance: per Duel's in-app Zero Edge banner (verified May 2026), 100% RTP at Duel applies up to a $50,000 daily wager limit per game (with a $1,000 single-bet limit). After the cap, 99.9% RTP applies on that game until the 24-hour reset. For recreational bankrolls this is functional 100% RTP; for high rollers, post-cap 99.9% still beats the 97% to 98% industry baseline.
- House edge
- The casino's mathematical advantage, expressed as percentage. Equals (100% - RTP). A 96% RTP slot has 4% house edge. Duel Originals at 100% RTP have 0% house edge up to the $50,000/day per-game cap, then 0.1% edge applies until the 24-hour reset.
- Variance
- The amount of swing in short-term results. High variance = bigger wins and losses, less often. Low variance = smaller more frequent wins. Variance does not affect long-term RTP, only the path to get there.
- EV (Expected Value)
- The average outcome of a bet repeated infinitely. Positive EV = you win on average. Negative EV = you lose on average. 0% house edge games are 0 EV, break-even on average.
- Rakeback
- The portion of losses returned to the player as cash. Duel pays 50% of losses on slots, 5% on Originals, 80% on Duel Blackjack, all wager-free.
- Wagering requirement (playthrough)
- A multiplier you must wager before claiming bonus funds. 30x wagering on $100 bonus = $3,000 in wagers required. Duel rakeback has zero wagering requirement.
- Multiplier
- In Crash, Plinko, Mines etc., the factor by which your stake is multiplied if you win. 2× multiplier on $10 bet = $20 payout.
Provably fair terms
- Provably fair
- A cryptographic technique that lets players verify each round was determined fairly and not manipulated retroactively. Uses server seed + client seed + nonce.
- Server seed
- A random value chosen by the casino. Committed in advance via SHA-256 hash. Revealed after the round so players can verify the seed was not changed.
- Client seed
- A value chosen by you (or random default). Combined with server seed to derive round results. You control this seed, change it anytime in account settings.
- Nonce
- A counter that increments each round. Combined with seeds to ensure each round produces a unique deterministic result.
- Hash (SHA-256)
- A one-way cryptographic function. Input maps to fixed-length output. Cannot reverse to find input. Used to commit to server seed without revealing it.
Crypto terms
- Network (chain)
- The blockchain a cryptocurrency uses. USDT exists on Tron (TRC20), Ethereum (ERC20), BSC (BEP20). You must match networks when depositing/withdrawing.
- Network fee (gas)
- The cost of broadcasting a transaction on a blockchain. Ethereum: $1–30 depending on demand. Tron: ~$1. Solana: under $0.01. Duel does not charge platform fees on top of network fees.
- Confirmation
- The process of a blockchain network validating a transaction. More confirmations = more secure. Bitcoin typically requires 1 confirmation (~10 minutes). Solana ~10 seconds.
- Memo / Destination tag
- A unique identifier required by certain networks (XRP, TON) so deposits route to the correct account on a shared address. Omitting it can result in lost funds.
- TXID (transaction hash)
- Unique identifier for a blockchain transaction. Useful for support tickets ("my deposit TXID is 0xabc... but my balance has not updated").
- Stablecoin
- A cryptocurrency pegged to a fiat currency, typically USD. USDT and USDC are pegged to $1. Reduces price-volatility risk during casino play.
Operator and compliance terms
- KYC (Know-Your-Customer)
- Identity verification procedure. Duel does not require KYC at standard play. Triggered by AML flags or large withdrawals.
- AML (Anti-Money Laundering)
- Regulations to prevent money laundering through gambling platforms. Includes transaction monitoring, large-transfer review, sanctions screening.
- Anjouan Gaming Authority
- The gaming regulator of the Autonomous Island of Anjouan (Union of Comoros). Issues Duel.com's licence ALSI-202411026-FI1. Low-tier offshore regulator.
- UKGC (UK Gambling Commission)
- The UK's gambling regulator. Strongest tier with mandatory deposit limits, self-exclusion (GamStop), and ADR schemes. Duel is NOT UKGC-licensed.
- MGA (Malta Gaming Authority)
- Malta's gaming regulator. Tier-1 alongside UKGC. Strong player protection and ADR. Duel is NOT MGA-licensed.
- Curaçao
- An offshore gaming licensing jurisdiction. Tier-2. Many crypto-casinos hold Curaçao licences. Stake.com, BC.Game, Bitstarz are Curaçao-licensed. Duel is NOT Curaçao, it is Anjouan.
- ADR (Alternative Dispute Resolution)
- Government-backed mediation body for resolving player-operator disputes. UKGC and MGA mandate ADRs. Anjouan does not.