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

Blackjack

Play moneyended

94aaa175259255dd791d8764d95441ae

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,220 play
Returned
2,105 play
Bettor's net
-115 play
Return
94.82%

Results by hand

Final
Hands
200
played
Pace
19.6/min
overall 20.3/min
Biggest swing
+20
Seat 1 · hand 15

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

SeatNetRateStreak
gbb-115-57.5 play/100lost 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
5010J♦9♦ 1910♠6♠ 16 surrendered50.5× the bet
49106♥9♣A♣7♦ 23A♠7♣5♥ 13 doubled404× the bet
48106♠7♣K♦ 23J♣9♦ 19202× the bet
47106♦9♦ 15A♦10♣ 21 blackjack252.5945× the bet
46108♦10♠ 18Q♣7♥ 1700× the bet
451010♣2♥ 126♥10♦ 16 surrendered50.5× the bet
44102♥4♣10♣2♠ 1810♠J♠ 20202× the bet
43102♦A♠ 13A♦K♥ 21 blackjack252.5945× the bet
4210Q♦Q♥ 206♠8♠8♥ 22 bust00× the bet
41109♦2♣ 1110♠A♥ 21 blackjack252.5945× the bet
40107♦7♠ 14A♣K♦ 21 blackjack252.5945× the bet
39104♣8♠J♣ 226♦8♣ 14202× the bet
3810K♠3♣J♣ 239♥K♠ 19202× the bet
3710J♠K♥ 206♣Q♣ 16 surrendered50.5× the bet
36106♦7♣9♣ 22K♠8♦ 18202× the bet
35104♦8♦5♠ 177♣5♠ 1200× the bet
34103♣5♣K♦ 18Q♥Q♠ 20202× the bet
3310J♦3♥Q♠ 23Q♥J♦ 20202× the bet
32108♥5♠7♠ 2010♣J♠ 20101× the bet
31102♠6♦5♣10♦ 23Q♣K♦ 20202× the bet
30103♣10♣6♦ 197♣8♦ 1500× the bet
2910K♣9♠ 19J♣6♣ 16 surrendered50.5× the bet
2810K♠6♦2♣ 18K♣3♥6♦ 19202× the bet
27109♥8♥ 178♥5♠9♣ 22 bust00× the bet
26106♦J♠3♥ 197♥6♠ 1300× the bet
25109♥7♥4♣ 208♠2♣7♣ 17 doubled00× the bet
2410A♣2♣ 135♠10♦7♦ 22 bust00× the bet
23105♣K♠6♦ 21Q♦6♠ 1600× the bet
221010♦8♠ 18K♦4♠J♥ 24 bust00× the bet
2110J♠8♣ 189♦J♣ 19202× the bet
20108♠K♥ 18K♠7♠ 1700× the bet
19105♦4♠4♣10♠ 239♣Q♥ 19202× the bet
1810J♦5♠ 156♥J♥ 16 surrendered50.5× the bet
17106♦4♦8♦ 18K♦2♠ 1200× the bet
16107♠8♠ 153♣6♥5♠2♦8♠ 24 bust00× the bet
1510K♠2♣7♠ 193♠8♠9♥ 20 doubled404× the bet
141010♣2♦ 124♦8♦A♠J♣ 23 bust00× the bet
13107♠2♣K♣ 194♠4♦Q♠ 1800× the bet
12107♣Q♦ 179♥8♣ 17101× the bet
11104♠K♥5♣ 192♠6♠A♣ 19101× the bet
10108♥5♠ 133♣A♣J♣9♠ 23 bust00× the bet
910A♠J♥ 215♥6♥ 1100× the bet
8106♦7♦3♣9♦ 259♠5♥ 14202× the bet
7108♥5♣9♣ 223♠4♠3♠K♣ 20202× the bet
610Q♦A♠ 21A♥J♥ 21 blackjack101× the bet
5105♥A♣10♥A♠ 177♠J♣ 17101× the bet
41010♦4♦10♥ 244♠2♠K♥4♣ 20202× the bet
3102♦10♦9♥ 218♣7♠ 1500× the bet
2108♣10♥ 182♠10♦7♠ 19202× the bet
11010♥4♥10♠ 249♠K♠ 19202× 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
8f391e06a05c662ec2ecc149dcc1000dc69cb15ca1ae18fca4814e337e4b5b5b
Seed
94259923eb03c101ecd2a1dcc7ae0b0b0be9864ed9a113e1abf45ecf8b3c5b4b SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
99354948cc3f5f4550371e9411cb64ec
Commitment
Batch 50,198, Merkle root 8c2ab362bea5a0d9799ed3bf7273cd71c42faae3c3398fc13a320884f9669ab9. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. ecff7aec1c733dd4dc7d196d60f1f41f634220b3596aad50392dc6cad4ec2cf6
  2. 7c5cb8a0d25171ba334a0d375e8a510ea06bfe7f7312e4f0b326e97dcb40e4ea
  3. ffe96154364fa527ff9d4298366d4768daf8cad26ac2b2953836c7fa87890b65
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.