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Degen Protocol USDC · ETHBase Sepolia · testnet
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Session against the house

Blackjack

Play moneyended

6e731b4f19feeb3feeeebce75fcf9b1c

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,340 play
Returned
2,105 play
Bettor's net
-235 play
Return
89.96%

Results by hand

Final
Hands
200
played
Pace
20.9/min
overall 20.5/min
Biggest swing
-20
Seat 1 · hand 3

Each seat's running result in play, hand by hand; the dashed line marks the biggest swing.

SeatNetRateStreak
gbb-235-117.5 play/100lost 2

Last hands

  1. 200Even0
  2. 199Even0
  3. 198Seat 1+10
  4. 197Even0
  5. 196Seat 1+15
  6. 195Even0
  7. 194Even0
  8. 193Even0
  9. 192Seat 1+10
  10. 191Even0
  11. 190Seat 1+15
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
200105♥A♠4♥ 20J♥4♣ 1400× the bet
199104♦5♠10♥ 197♣9♦ 1600× the bet
1981010♥2♦10♣ 229♠10♠ 19202× the bet
1971010♥9♣ 193♥8♥6♠ 17 doubled00× the bet
196105♦K♣ 1510♠A♦ 21 blackjack252.5945× the bet
1951010♠A♥ 21K♠6♥ 1600× the bet
1941010♥A♦ 213♠3♦ 600× the bet
193103♦2♥A♥3♠ 194♠5♣10♥ 19 doubled202× the bet
192108♦3♠3♦8♠ 22A♥5♦6♥8♣ 20202× the bet
191104♥3♠4♥10♦ 214♣J♥ 1400× the bet
190102♣J♣ 12A♥10♠ 21 blackjack252.5945× the bet
18910Q♦8♦ 185♥6♥2♣ 13 doubled00× the bet
188109♥3♣K♦ 22A♦5♦7♣2♣5♣ 20202× the bet
187105♦4♠Q♦ 19K♠7♥ 1700× the bet
186108♦6♦ 145♣7♣K♠ 22 bust00× the bet
185109♣3♣ 124♦2♦7♦9♥ 22 bust00× the bet
184106♥2♠10♥ 189♦3♦ 1200× the bet
1831010♠4♦4♠ 185♥3♦4♦9♣ 21202× the bet
182107♥2♣ 93♥9♣J♠ 22 bust00× the bet
181106♦5♥K♠ 212♦7♦Q♦ 19 doubled00× the bet
18010K♣7♥ 177♣J♠ 17101× the bet
179103♣7♠8♥ 187♥4♦4♥ 15 doubled00× the bet
1781010♦8♥ 183♠8♠5♠ 16 doubled00× the bet
17710J♦J♥ 202♦J♣3♠7♠ 22 bust00× the bet
176107♠6♠K♦ 237♣A♦ 18202× the bet
17510K♥5♥7♠ 228♦A♥ 19202× the bet
174105♥4♦K♦ 197♣8♠ 157♦10♥ 1700× the bet
17310A♥8♣ 194♥J♦8♣ 22 bust00× the bet
17210A♠3♠4♥ 185♦10♣3♠ 18101× the bet
17110Q♣4♠K♠ 24K♠7♥ 17202× the bet
170108♠3♣4♥2♦ 175♦3♣10♦ 18202× the bet
169103♦K♥8♣ 215♣5♣K♥ 20 doubled00× the bet
16810Q♣J♠ 20K♣5♣ 15 surrendered50.5× the bet
167102♦10♥9♣ 212♠K♠2♣ 1400× the bet
166109♠Q♠ 197♦J♦ 1700× the bet
16510K♣10♠ 20A♣9♥ 20101× the bet
164109♣Q♦ 198♠K♠ 1800× the bet
163102♥2♥7♥4♣10♠ 25K♣4♠ 14202× the bet
162109♠A♥ 204♣J♣7♠ 21202× the bet
161108♦5♠A♠8♠ 229♣3♦5♥ 17202× the bet
16010A♠Q♠ 2110♥7♦ 1700× the bet
1591010♥K♦ 20A♥6♥J♥ 1700× the bet
15810J♥10♥ 207♠7♣A♦K♥ 25 bust00× the bet
157108♥9♣ 175♣A♥8♣8♣ 22 bust00× the bet
15610A♦7♣ 18K♦7♠ 1700× the bet
15510Q♠4♠8♣ 222♦3♣A♣2♠Q♣ 18202× the bet
15410J♦8♣ 185♠8♠Q♣ 23 bust00× the bet
153103♣K♠4♥ 1710♦5♥ 1500× the bet
152107♦5♠ 12J♥6♣J♣ 26 bust00× the bet
151106♥8♠5♥ 195♥5♥Q♥ 20 doubled404× the bet

Provably fair

Verify fairness

The session's seed decides every card. Its hash was committed before the first hand; the seed is revealed when the session ends. Each round's cards come from HMAC-SHA256 keyed by the seed over the round's number and the bettor's own seed.

Seed hash
f5660f1b2d5e33564b4046b60c43a10e7c431851a3acc8ae526eab05efb9dde0
Seed
7ca12df61e0a1c85034e29635f12e671d521e2c74cc6b71530c8fc1868df23bc SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
2dfcfc93063cbe5b8611e28b7f8f4567
Commitment
Batch 60,950, Merkle root cc97a72cc7ff0675a45a20c2232a45282c0f128d9a4b6b4b85739aa4c7e41e0b. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 57c0d5248b2990b2e3f0be49d0310c979ff05b2b9cf06ad33704f70185c48456
  2. cdbe7dc528dcd7ff902a9f2fe73dbcf46b1b9244d4bc97065a196c4c9d5a7c64
  3. b981267ebe37b210c8582996f14307459bfc5909e32a27fe265b2e75761bf5d4
Checked: the seed hash proves into the root.

To check it yourself, take the session's proof:

  1. Hash the seed as above and compare it with the seed hash; prove the seed hash into the root with the Merkle path (keccak256, as for every match).
  2. For each round: round seed = HMAC-SHA256(key = seed, "degen.house.round.v1" ‖ 0x00 ‖ u64be(length of the bettor's seed) ‖ bettor's seed ‖ u64be(round)).
  3. Key ChaCha20 (RFC 8439, zero nonce) with the round seed and read little-endian 64-bit words; a card is the next word below 264 − 1 − ((264 − 1) mod 52), modulo 52.
  4. Replay the round's actions with the game's rules: the cards and the payout must match.

The replay plays every hand rebuilt this way on the server from the same data, and marks any that does not rebuild as recorded.