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

Blackjack

Play moneyended

0d0aa6c97974e72e4676658b9f0e7cb0

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,240 play
Returned
2,320 play
Bettor's net
+80 play
Return
103.57%

Results by hand

Final
Hands
200
played
Pace
21.0/min
overall 20.3/min
Biggest swing
-30
Seat 1 · hand 33

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

SeatNetRateStreak
gbb+80+40.0 play/100won 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200103♣5♠8♦J♣ 265♥K♥ 15202× the bet
1991010♠A♣ 21J♥7♠ 1700× the bet
198107♥5♠ 123♦9♣K♥ 22 bust00× the bet
19710J♦Q♣ 20K♦10♣ 20101× the bet
196109♣9♣ 182♣8♥3♦ 13 doubled00× the bet
1951010♥J♥ 20Q♣K♦ 20101× the bet
19410A♣K♦ 219♦4♠ 1300× the bet
19310K♣Q♠ 20A♥J♥ 21 blackjack252.5945× the bet
19210K♥3♠8♣ 218♥9♥ 1700× the bet
191103♦K♣K♦ 238♦5♣ 13202× the bet
1901010♣5♥ 152♥3♣7♣J♠ 22 bust00× the bet
189105♥3♦10♠ 182♥A♥3♦9♦ 1500× the bet
188103♠7♣4♥4♣ 182♠3♣K♦ 1500× the bet
18710Q♦J♣ 204♣Q♦3♠ 1700× the bet
186107♠2♠9♠ 1810♣7♠ 1700× the bet
185103♣7♠K♠ 2010♣8♣ 1800× the bet
184104♣J♥7♣ 218♥4♦ 128♥7♦ 1500× the bet
18310A♦10♠ 217♠10♦ 1700× the bet
182102♦3♥8♦2♠A♠J♥ 266♣7♦ 13202× the bet
18110J♦7♠ 173♠2♥A♦J♥7♠ 23 bust00× the bet
180104♦K♠J♥ 244♣9♠ 13202× the bet
179104♦6♣8♦ 189♥7♠ 1600× the bet
178108♦K♠ 18Q♠3♠5♠ 18101× the bet
177103♥3♦7♦5♣ 185♦4♥10♦ 19 doubled404× the bet
176102♦3♥J♠7♥ 223♥7♣K♥ 20 doubled404× the bet
17510Q♣7♦ 17Q♠Q♠ 20202× the bet
174108♣5♣3♣A♦ 1710♥6♥2♥ 18202× the bet
173109♣7♣5♣ 21J♦J♣ 2000× the bet
17210Q♥8♥ 187♥9♣ 16 surrendered50.5× the bet
171102♥Q♦10♥ 22K♥6♠ 16202× the bet
170103♥4♦7♣K♦ 244♣10♥ 14202× the bet
169103♦9♦2♣9♥ 236♠A♥7♣ 14 doubled404× the bet
168109♣8♥ 175♣Q♦2♣ 17101× the bet
16710K♠3♥J♠ 233♦7♦10♥ 20202× the bet
166107♥4♣ 1110♣4♠8♥ 22 bust00× the bet
165108♣Q♠ 18J♣9♦ 19202× the bet
16410K♠Q♠ 20Q♠A♣ 21 blackjack252.5945× the bet
1631010♣J♣ 207♥4♠J♥ 21 doubled404× the bet
162108♥3♠8♦ 198♦5♣4♠ 1700× the bet
161105♣J♠9♠ 242♣J♥ 12202× the bet
160105♥K♥10♦ 253♠2♣10♠ 15202× the bet
15910Q♣5♣ 155♣3♣8♥8♦ 24 bust00× the bet
15810Q♦4♥ 14A♠4♥3♠5♥10♠ 23 bust00× the bet
1571010♦J♣ 203♦10♣3♦J♣ 26 bust00× the bet
156106♥7♦A♣9♥ 23Q♦K♦ 20202× the bet
155106♣J♣7♠ 235♣7♦ 12202× the bet
15410K♦6♦J♠ 2610♠K♦ 20202× the bet
153108♣10♥ 1810♦2♠9♥ 21202× the bet
152105♣J♣4♦ 194♥9♠ 1300× the bet
151106♣J♥8♣ 244♣10♣ 144♣6♦5♦ 15 doubled606× 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
c49e337e5183b8e76382e31d81264105e76833ea4aa75c45c49062b501fde276
Seed
8963900c59a680e35fdfdd88fa01ee5c93738c7bb1c76d035c6e1084c0a505c1 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
34c1c116e7573d432a5f2ce97720e01c
Commitment
Batch 54,849, Merkle root 6f780cf6d0154caef8972b84daa5ffb67d91163807902c7f6c82afb748a01d76. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 7339c4ba83bd5310b8ef7dce93cad9259ca3e14b69523daec5257e79ba663a30
  2. ab15654fff79176754441237d838ddae42964d7b5f62363001717abf33b71cda
  3. 22a2b20706dfd759029da4c8a5e3cb9364ced5ed2f88e1231dbe7b1d7b543a07
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.