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

Blackjack

Play moneyended

b681adfe6d43d6d71a97454813ed1115

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,330 play
Returned
2,020 play
Bettor's net
-310 play
Return
86.70%

Results by hand

Final
Hands
200
played
Pace
20.1/min
overall 20.5/min
Biggest swing
+40
Seat 1 · hand 43

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

SeatNetRateStreak
gbb-310-155.0 play/100lost 2

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
5010Q♥9♣ 19J♥K♣ 20202× the bet
4910J♣K♣ 204♣A♣A♦Q♣Q♠ 26 bust00× the bet
4810J♥7♦ 172♠3♦A♠Q♥4♥ 20202× the bet
4710J♠10♠ 20Q♥A♦ 21 blackjack252.5945× the bet
46106♥2♥J♥ 182♠J♦ 1200× the bet
45108♥J♥ 184♣10♦A♠K♣ 25 bust00× the bet
44105♥A♣3♦ 199♦5♦ 1400× the bet
43105♥10♥2♠ 173♥8♠Q♣ 21 doubled3♣6♦A♠ 20 doubled808× the bet
42103♦3♣3♥5♥2♣A♥ 173♦10♥ 1300× the bet
41103♣10♥Q♠ 236♦7♥ 13202× the bet
4010A♥A♣ 126♦6♥Q♠ 22 bust00× the bet
391010♥7♥ 17K♦6♥ 16 surrendered50.5× the bet
38108♠5♣8♣ 21Q♥Q♣ 2000× the bet
37103♦6♠3♠A♦4♦ 175♥6♠10♣ 21 doubled404× the bet
3610J♦5♥ 156♣J♠ 16 surrendered50.5× the bet
3510K♦10♦ 2010♦A♠ 21 blackjack252.5945× the bet
34102♥10♠8♠ 20J♥4♥ 1400× the bet
33106♦Q♠ 16A♥Q♥ 21 blackjack252.5945× the bet
3210J♥8♥ 184♣10♣J♣ 24 bust00× the bet
31109♠3♠ 125♥8♥K♣ 23 bust00× the bet
3010A♥9♣ 20J♣A♥ 21 blackjack252.5945× the bet
29108♥8♥J♦ 26J♦8♦ 18202× the bet
28107♥7♥8♦ 22Q♦4♦3♣ 17202× the bet
271010♠J♠ 20K♦8♥ 1800× the bet
2610Q♦4♥6♠ 206♣7♣2♠3♥ 1800× the bet
25103♥7♠A♥ 219♥7♥ 169♣2♣2♣ 13 doubled00× the bet
241010♠10♣ 2010♥K♦ 20101× the bet
23103♥9♥8♥ 205♠4♦5♣ 14 doubled00× the bet
22109♣2♣Q♣ 21K♣2♣7♦ 1900× the bet
211010♣J♣ 205♠10♣ 15 surrendered50.5× the bet
2010Q♥6♠K♣ 265♣4♦2♣3♠3♦ 17202× the bet
191010♣9♥ 194♦8♥Q♠ 22 bust00× the bet
1810Q♣K♦ 207♥4♦10♠ 21 doubled404× the bet
17104♠10♦10♠ 249♥K♦ 19202× the bet
16106♦7♥K♦ 23A♣2♦8♠ 21 doubled404× the bet
15105♥3♦4♣9♦ 215♥7♦ 1200× the bet
14106♥7♦6♦ 194♦7♥A♥ 12 doubled4♣A♠5♣ 20 doubled404× the bet
1310A♥5♠2♥ 189♠6♥3♣ 18101× the bet
121010♣5♣ 152♥7♣3♣10♠ 22 bust00× the bet
1110J♠4♠5♦ 19J♥4♥6♠ 20202× the bet
1010J♠5♠Q♦ 25Q♦7♦ 17202× the bet
910K♠4♣ 147♦A♥5♦9♣ 22 bust00× the bet
8109♥K♦ 19Q♥J♥ 20202× the bet
7103♥3♥6♣10♦ 22J♦Q♣ 20202× the bet
61010♣3♥ 13Q♦5♦ 15 surrendered50.5× the bet
5109♦9♦ 189♥A♦ 20202× the bet
4105♠6♥ 11A♦J♦ 21 blackjack252.5945× the bet
310A♦Q♣ 217♠A♥ 1800× the bet
2103♦8♠4♥9♣ 246♥K♣ 166♣A♠8♠ 15 doubled606× the bet
1104♥A♥7♣9♣ 2110♣2♠ 1200× 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
1325fce306adf81ffb4f6c92903cf4e7c50b3a3e152e9554d22fae99645876ed
Seed
30939189f8408fc05801230d7fe7bcfdcfff62b871370abde115979c939de7f0 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
02d6ef4da44c322b1b5307691bbfbb9a
Commitment
Batch 55,065, Merkle root c4c353b961a1f6930382eef46aade3a12eb6be298e9d6199196801c5ebf3a415. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. fec7b7760dbcddf45505de0b792db229017959fbf974e330741bebf226b706cc
  2. e5fc626dd157c325c78bdf445a836d8883adeff77454553ddb675f326795df6f
  3. c1f85f4c12c79da0fe39650248122fec988a115879c3bd4eaa5748e1d9a31b7b
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.