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

Blackjack

Play moneyended

c35944b0f501e510f2c737478d33174b

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,330 play
Returned
2,305 play
Bettor's net
-25 play
Return
98.93%

Results by hand

Final
Hands
200
played
Pace
21.1/min
overall 20.7/min
Biggest swing
-40
Seat 1 · hand 23

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

SeatNetRateStreak
gbb-25-12.5 play/100won 4

Last hands

  1. 200Seat 1+10
  2. 199Seat 1+10
  3. 198Seat 1+20
  4. 197Seat 1+20
  5. 196Even0
  6. 195Even0
  7. 194Even0
  8. 193Even0
  9. 192Even0
  10. 191Even0
  11. 190Even0
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
50108♦9♠ 179♥3♣3♠8♣ 23 bust00× the bet
49102♠3♣8♦8♠ 214♥8♠3♠ 1500× the bet
48102♦J♣9♥ 21J♦8♣ 1800× the bet
47107♦4♦4♥2♥ 179♠K♣ 19202× the bet
46103♦2♣7♥K♥ 224♥4♣7♣ 15202× the bet
451010♦8♦ 184♥J♠8♣ 22 bust00× the bet
4410K♥7♣ 17J♣2♥4♥J♣ 26 bust00× the bet
43108♠10♦ 18K♣Q♦ 20202× the bet
42103♠9♦10♦ 226♦3♥5♦ 14 doubled404× the bet
41102♠3♥9♦2♠J♣ 26Q♣10♣ 20202× the bet
4010K♥A♠ 216♣5♦ 1100× the bet
39109♣4♦ 133♥5♠4♠J♠ 22 bust00× the bet
3810K♥10♣ 208♥5♠K♠ 23 bust00× the bet
3710Q♠A♥ 21K♥3♣ 1300× the bet
3610A♥K♠ 212♠K♠ 1200× the bet
351010♠7♣ 176♥5♠Q♠ 21 doubled404× the bet
34102♠J♦8♣ 209♣7♦ 1600× the bet
3310Q♦A♥ 21J♠9♥ 1900× the bet
3210Q♠9♠ 19A♥6♥2♣ 19101× the bet
31106♥2♥8♥2♦ 188♣K♦ 18101× the bet
30106♥J♥4♠ 202♦7♦Q♦ 19 doubled00× the bet
29106♠K♣ 16A♣J♣ 21 blackjack252.5945× the bet
2810K♦J♦ 20K♥K♦ 20101× the bet
27106♣5♦9♥ 2010♦10♦ 20101× the bet
2610J♦K♣ 20Q♥K♥ 20101× the bet
25108♦J♠ 184♠6♠2♣ 12 doubled00× the bet
24109♥5♥3♠ 175♦4♠2♣K♥ 21202× the bet
23104♦A♥3♠ 187♣2♠6♥ 15 doubled7♣A♥6♦ 14 doubled00× the bet
22108♣10♥ 18J♦4♦K♣ 24 bust00× the bet
21105♣K♦3♦ 187♣Q♦ 1700× the bet
2010K♣6♦ 1610♠3♣K♦ 23 bust00× the bet
19107♥7♦4♥ 183♠7♠2♠ 12 doubled00× the bet
1810Q♥9♦ 194♠3♥Q♠ 1700× the bet
171010♣A♣ 21K♦4♦ 1400× the bet
16108♠5♦4♦ 17J♥10♠ 20202× the bet
15107♣J♠ 174♠3♣7♣J♥ 24 bust00× the bet
1410J♦2♥5♦ 177♣5♦7♠ 19202× the bet
13107♣K♣ 17A♠6♠3♣ 20202× the bet
12104♠4♥ 8A♦K♦ 21 blackjack252.5945× the bet
1110J♠10♥ 205♥A♣2♦7♦2♠ 1700× the bet
10103♠10♠Q♠ 237♠6♣ 13202× the bet
9108♥4♠A♣5♥ 18Q♥J♥ 20202× the bet
810K♠7♥ 17K♣9♣ 19202× the bet
7103♥4♠7♦2♣7♠ 233♥2♣2♥Q♦ 17202× the bet
6108♠A♦ 19Q♣10♥ 20202× the bet
5108♦5♣ 136♥8♦A♦A♥K♣ 26 bust00× the bet
4102♥Q♠4♣A♣ 176♦K♠ 1600× the bet
310Q♦A♥ 21Q♦8♦ 1800× the bet
2103♠8♥7♣ 18J♦3♠ 1300× the bet
110Q♠K♦ 202♦7♣J♠ 1900× 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
95fbc7b88871759fa0b782e5d9b25ad28b533c8eb91c010f0139887e19ea70b3
Seed
c4291173020012232ab7e177056736bef716a2b1125a75521e4327a4d13ac97d SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
0c8250cbca73fccc64cdb82d3690b4d7
Commitment
Batch 56,762, Merkle root f35a75f8861fb60b703820c89d386f36bfc8a149bb9bb9c830daa912824d7184. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 63790f8c732b9661201d1f9de29d7742a1f83c6de9b2f1a86e2d086409308834
  2. 8e2f6e9a5459d68935c6a9463125023c3860945c167be52fb9d34c8f88c223a1
  3. 2716336b036bdcd0301a4de5db03ee4af72a3d2aa3334a1dcde79c58f01ce377
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.