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

Blackjack

Play moneyended

7a77598ce95a0c135ae0c79ce31502b2

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,340 play
Returned
2,235 play
Bettor's net
-105 play
Return
95.51%

Results by hand

Final
Hands
200
played
Pace
20.4/min
overall 20.9/min
Biggest swing
-40
Seat 1 · hand 61

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

SeatNetRateStreak
gbb-105-52.5 play/100won 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
100109♣K♦ 192♠5♥J♠ 1700× the bet
99109♥2♣Q♦ 218♥2♦3♣ 13 doubled00× the bet
98102♦7♠8♣ 174♣9♦ 1300× the bet
97106♥8♣8♦ 223♠6♣10♠ 19 doubled404× the bet
96108♣7♠ 156♠8♠9♠ 23 bust00× the bet
95108♦8♠A♥ 17A♠9♣ 20202× the bet
9410K♥K♣ 208♦K♣ 1800× the bet
93107♠Q♥ 179♦K♠ 19202× the bet
92105♠Q♠J♠ 259♥2♥9♠ 20 doubled404× the bet
91103♦5♥2♦4♦J♥ 24J♥8♠ 18202× the bet
90109♣3♣Q♠ 226♦2♠Q♠ 18202× the bet
8910Q♦7♥ 177♥9♣ 16 surrendered50.5× the bet
881010♣8♦ 18J♣4♠A♥A♠4♠ 20202× the bet
8710K♥7♥ 17A♥K♠ 21 blackjack252.5945× the bet
8610J♠Q♦ 20J♣8♠ 1800× the bet
85109♠Q♣ 19A♠K♥ 21A♦Q♣ 21404× the bet
84105♠5♥A♥ 21J♠2♠ 1200× the bet
8310J♥4♦ 14J♦6♦ 16 surrendered50.5× the bet
82103♣6♣10♣ 196♣J♣ 1600× the bet
81102♦9♣Q♠ 217♠6♥ 1300× the bet
8010K♠7♠ 17Q♣9♥ 19202× the bet
79106♥4♠10♣ 202♦7♣9♥ 18 doubled00× the bet
7810J♣J♠ 203♠7♠Q♠ 20101× the bet
77109♥9♣ 18A♠8♣ 19202× the bet
7610A♥K♦ 213♠3♠ 600× the bet
75108♥6♥6♣ 209♦Q♠ 1900× the bet
74102♠K♠8♦ 205♣9♥ 1400× the bet
7310A♥9♠ 20Q♦2♥K♦ 22 bust00× the bet
72106♠Q♦J♠ 2610♣7♦ 17202× the bet
7110Q♦K♥ 203♦9♣5♣ 1700× the bet
70103♣3♦5♠7♥ 189♣10♥ 19202× the bet
6910A♣2♣ 138♥3♦3♣A♦Q♦ 25 bust00× the bet
681010♠K♣ 206♥A♥3♠ 20101× the bet
67106♣2♠8♦J♥ 26J♦3♦ 13202× the bet
66103♥K♥9♣ 224♠6♥7♥ 17 doubled404× the bet
65107♥3♦2♣6♠ 187♣4♣6♠ 17 doubled00× the bet
64104♦K♦4♦ 186♥K♣ 1600× the bet
6310Q♠Q♠ 20K♥4♣6♣ 20101× the bet
62109♥2♠A♥2♥9♣ 23K♣7♠ 17202× the bet
61104♥A♣Q♣6♣ 218♠3♠8♣ 19 doubled8♣A♣ 198♣9♥ 1700× the bet
6010Q♥5♥ 152♥6♦7♠K♥ 25 bust00× the bet
59103♣6♥10♥ 19J♣8♠ 1800× the bet
5810Q♥5♣J♠ 25J♣9♣ 19202× the bet
57103♣J♦9♠ 22K♦Q♥ 20202× the bet
5610Q♦5♣10♠ 253♥A♣J♥3♣ 17202× the bet
55105♥5♠10♠ 204♥A♣6♥ 21 doubled404× the bet
5410K♣3♦ 13K♣A♣ 21 blackjack252.5945× the bet
5310A♦J♣ 21K♦K♥ 2000× the bet
521010♥Q♦ 206♥Q♦ 16 surrendered50.5× the bet
51103♠8♥8♠ 192♣10♣4♥ 1600× 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
30ac99bd6746ffb1ff0d0ed8ea4036f02f1043bc43008b2cfa29b76dd4aa2751
Seed
62105402b28ba60e1fa5a3a97164b7ad594a32ada9586840a639032d034e0a8d SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
18a365c27841dc0dcc9d4d92e8a2271c
Commitment
Batch 49,728, Merkle root 963ef63297937d2a8a41016c187f0912e965516bab942581889a6c7344c5225d. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 0cfa505980fc4e84b2d6c41a6b13145293800b6b3a0b04dad7a68ca32250f69f
  2. d784991b250cc0fceb76a20966e8ee8804012fdfffb268f9b5c6e5fac640d551
  3. b3f9ea36ad843c00abd11f317a90935187fc44fdc00cff72a1683fd93379bf1d
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.