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

Blackjack

Play moneyended

65562532b67ce42dcaad1b2fc80024ae

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,420 play
Returned
2,330 play
Bettor's net
-90 play
Return
96.28%

Results by hand

Final
Hands
200
played
Pace
21.5/min
overall 20.6/min
Biggest swing
-30
Seat 1 · hand 158

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

SeatNetRateStreak
gbb-90-45.0 play/100lost 2

Last hands

  1. 200Even0
  2. 199Even0
  3. 198Seat 1+20
  4. 197Seat 1+15
  5. 196Even0
  6. 195Even0
  7. 194Even0
  8. 193Even0
  9. 192Seat 1+15
  10. 191Even0
  11. 190Even0
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
50104♥4♣J♥ 187♣9♠ 1600× the bet
49107♦Q♥ 175♥7♦A♠4♠ 17101× the bet
4810Q♥Q♦ 20A♥6♥7♠3♠ 1700× the bet
4710J♥4♣ 142♦Q♣3♠8♠ 23 bust00× the bet
46103♣3♠J♠6♠ 22A♣7♣3♦ 21 doubled404× the bet
45105♠10♣9♦ 24K♥6♣ 16202× the bet
4410J♠K♥ 209♦8♣ 1700× the bet
4310K♦Q♥ 207♣4♣10♦ 21 doubled404× the bet
42109♣3♠3♥7♥ 224♣6♠7♥ 17 doubled404× the bet
41108♠8♣K♠ 26J♦9♦ 19202× the bet
40103♣3♣7♠K♣ 235♣K♦ 15202× the bet
39103♣6♥A♠ 206♠2♦6♦ 146♠3♥A♣ 20 doubled202× the bet
38107♠10♣ 1710♦6♥J♠ 26 bust00× the bet
37102♣9♣7♠ 1810♣J♥ 20202× the bet
3610A♠K♠ 214♦10♣ 1400× the bet
35104♥Q♣A♠3♦ 187♠4♣3♦ 14 doubled00× the bet
34103♥Q♣4♦ 1710♥5♣ 1500× the bet
33103♦9♥J♥ 22A♣7♦ 18A♥7♠ 18404× the bet
32109♦2♦9♦ 202♣Q♣6♥ 1800× the bet
31104♣8♦Q♥ 22J♥4♥ 14202× the bet
3010K♥10♣ 203♥8♠2♠ 13 doubled00× the bet
29104♦Q♦7♥ 21J♠6♦ 1600× the bet
28108♥Q♣ 18Q♠6♠6♠ 22 bust00× the bet
27106♣6♠5♠ 177♦10♠ 17101× the bet
26109♦5♥7♥ 216♠6♣2♠7♠ 21101× the bet
25106♦5♦6♦ 17J♦5♠ 1500× the bet
2410A♣J♥ 21K♥5♣ 1500× the bet
23106♦6♦A♣10♣ 233♠6♠6♣ 15 doubled404× the bet
22105♦4♥9♠ 188♣6♠ 1400× the bet
211010♥J♦ 202♣9♥6♥ 17 doubled00× the bet
2010J♦7♦ 172♠10♠J♣ 22 bust00× the bet
19106♦10♠J♥ 26A♥Q♠ 21A♣5♥ 16404× the bet
1810A♦10♣ 21Q♠10♥ 2000× the bet
1710Q♣4♠ 146♠4♠5♦J♥ 25 bust00× the bet
1610Q♦2♥5♥ 17J♣K♥ 20202× the bet
15108♦K♣ 1810♠Q♠ 20202× the bet
14103♦10♦2♠K♣ 25K♠6♠ 16202× the bet
13104♠5♥K♣ 199♦Q♦ 19101× the bet
1210Q♥6♠3♥ 192♦A♥A♠A♠5♦ 20202× the bet
11102♦10♥7♣ 19A♣Q♦ 21A♣3♦ 14202× the bet
1010A♥J♣ 21Q♣10♦ 2000× the bet
9105♣2♥2♣2♣8♦ 1910♠5♦ 1500× the bet
8107♣7♠ 14A♥10♦ 21 blackjack252.5945× the bet
71010♥J♣ 205♥2♠7♦Q♦ 24 bust00× the bet
610K♣2♦9♦ 218♠5♠8♦ 21101× the bet
510A♠6♣ 172♥K♦A♦7♦ 20202× the bet
4106♠2♦K♣ 182♣8♦8♣ 18 doubled202× the bet
3105♣4♦8♠ 174♠K♥ 1400× the bet
2108♠Q♦ 18K♣6♦9♦ 25 bust00× the bet
1109♠5♦A♣J♦ 25Q♦4♦6♥ 20202× 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
ddc7c306b67f64f416df595ca42f0a097b18b84f221e8821fa6b7e2c30e2b2b1
Seed
830ae63539dc4ffeb1c801469e6ce3b40ea27c67fabb57b69ba2ae27dfc59107 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
96bd516b77fa190e915ba849d804d2e8
Commitment
Batch 57,862, Merkle root 8c6d6a23e78621b5447b9b715c591ae5920acd587deb66f59c4b73eed69ba214. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 88c6c2b3e55202942a3baad564ec9ce2497f3d7cc4735479aef84bc2c1d089bf
  2. ff8b9b3b17876749d69ccd0734c8a9e7a83b6790b1c31d4df7ccab2ea89701df
  3. 2a1ce7cfd5eab97731c3595cbc4c6d766753d84de72c1f190c95fc203ec083e4
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.