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

Blackjack

Play moneyended

9d267a94c4eb2b5402e4113a9106b09f

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,230 play
Returned
2,305 play
Bettor's net
+75 play
Return
103.36%

Results by hand

Final
Hands
200
played
Pace
19.7/min
overall 20.3/min
Biggest swing
+40
Seat 1 · hand 171

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

SeatNetRateStreak
gbb+75+37.5 play/100lost 2

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
50109♣K♠ 1910♦7♦ 1700× the bet
4910Q♥9♥ 192♠3♦9♠4♥ 1800× the bet
48105♥6♣5♥3♣ 197♠Q♣ 1700× the bet
4710K♠4♣ 14K♦6♠ 16 surrendered50.5× the bet
46102♦J♠Q♠ 22Q♣8♥ 18202× the bet
4510Q♣5♦K♦ 254♠3♠K♦ 17202× the bet
4410K♦3♠Q♥ 232♠Q♥3♣4♥ 19202× the bet
43108♦Q♠ 18Q♥2♠K♥ 22 bust00× the bet
42108♦10♠ 189♣6♦5♠ 209♥6♠K♣ 25 bust202× the bet
41105♠10♠6♣ 214♥J♣ 1400× the bet
4010A♣Q♦ 21Q♥K♠ 2000× the bet
3910Q♣A♠ 2110♦Q♣ 2000× the bet
38105♠4♠4♣K♠ 235♠5♠10♠ 20 doubled404× the bet
37104♠8♥K♠ 224♦K♠ 14202× the bet
36106♠2♥4♣8♦ 205♥2♦7♦ 1400× the bet
35108♠A♣ 19A♦Q♠ 21 blackjack252.5945× the bet
3410K♥J♣ 20K♠A♣ 21 blackjack252.5945× the bet
33103♥2♠5♠5♣5♣ 2010♦3♠ 1300× the bet
3210Q♦J♦ 20J♣A♣ 21 blackjack252.5945× the bet
3110J♥8♠ 187♥3♣2♦10♣ 22 bust00× the bet
3010K♥6♥10♣ 269♣8♠ 17202× the bet
2910J♥J♥ 20J♣7♠ 1700× the bet
28109♦10♣ 195♥4♥2♦6♠ 1700× the bet
2710K♣Q♠ 205♣7♠5♠ 1700× the bet
2610J♥8♠ 18K♠Q♥ 20202× the bet
2510Q♦9♠ 199♥Q♣ 19101× the bet
24102♥Q♦ 12A♣K♠ 21 blackjack252.5945× the bet
2310Q♣Q♠ 20A♦10♦ 21 blackjack252.5945× the bet
22105♣7♣3♠10♠ 25Q♥8♠ 18202× the bet
2110J♦8♣ 18K♣Q♣ 20202× the bet
2010A♦Q♥ 217♣7♣ 1400× the bet
1910Q♠8♣ 183♣3♣7♥A♣3♣ 1700× the bet
1810K♦5♠10♣ 252♠7♠8♣ 17202× the bet
17109♥Q♠ 199♥J♦ 19101× the bet
16102♠2♥10♣3♣ 175♥2♦9♥ 1600× the bet
1510K♥9♠ 19A♦Q♠ 21 blackjack252.5945× the bet
1410A♠3♦ 143♥A♠K♦2♠9♥ 25 bust00× the bet
13103♥3♥A♥ 172♣5♣5♠A♣ 1300× the bet
1210J♥7♦ 172♠J♥10♥ 22 bust00× the bet
11107♥Q♠ 179♦10♠ 19202× the bet
10107♣5♦8♦ 209♥9♥ 1800× the bet
910A♣2♦ 138♠2♥2♠2♦J♠ 24 bust00× the bet
810K♥10♥ 202♠7♥2♦J♦ 21202× the bet
710A♠6♣ 17A♥J♦ 21 blackjack252.5945× the bet
610J♦10♦ 20K♠2♥A♠J♥ 23 bust00× the bet
5107♠3♦8♦ 18A♣9♦ 20202× the bet
4102♦3♠8♥A♥2♦7♦ 2310♥5♦ 15202× the bet
310Q♠J♦ 20J♠7♦ 1700× the bet
210K♠7♦ 172♥9♦K♦ 21 doubled404× the bet
1102♠10♠A♠Q♠ 232♥5♦Q♣ 172♦6♦3♥Q♦ 21404× 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
1c5780b6fc45983276b7186eb6ac6268e637229b7baba42ddf184d6049257a28
Seed
0191c61a6f53a0d39e231173942718e448fd83fb3701967067074897b2aef25e SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
c03d26ae68808b03accaf1439d67aee4
Commitment
Batch 51,539, Merkle root d2c59aa8105d754ac86519c3fa14064f340a73e24dab0b6c3462d46e6b313127. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. eeadc6eabafbcc51bf165c71046e8dd32ad8a6b8c3958b551f70c446b466230b
  2. 64f2539a7bfb4c82c6b1bddf31e523f3c16be89b2c63b82bab38f416f7327a64
  3. 62d1cddd12522c47f3c11cf7142582cbcedb51bcbea6c8cffe1158227e6d0dfe
  4. a183ec0b8f33482e19838c75abebbbb8c212701389d26c6545d1e05e395bb750
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.