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

Blackjack

Play moneyended

0b18564bab4d457059b52af4e1a6f090

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,240 play
Returned
2,130 play
Bettor's net
-110 play
Return
95.09%

Results by hand

Final
Hands
200
played
Pace
19.5/min
overall 20.3/min
Biggest swing
-30
Seat 1 · hand 97

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

SeatNetRateStreak
gbb-110-55.0 play/100lost 4

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200108♠6♥ 144♠8♠A♣J♣ 23 bust00× the bet
199102♣9♠J♣ 216♥2♦10♠ 1800× the bet
198102♦Q♣2♥6♣ 20J♣3♦ 1300× the bet
19710A♦A♣K♦3♦6♣ 214♥2♥3♥A♦ 2000× the bet
196103♠10♦5♦ 18K♦K♦ 20202× the bet
195108♦5♠K♣ 234♣J♣5♥ 19202× the bet
19410Q♦7♥ 17K♥8♠ 18202× the bet
193107♦10♠ 17K♠10♠ 20202× the bet
192103♠4♦5♥4♦9♥ 2510♥7♥ 17202× the bet
1911010♦5♠ 152♣7♥3♥Q♠ 22 bust00× the bet
190106♥7♦7♣ 206♥A♦2♦ 19 doubled00× the bet
189104♠2♦J♠A♦ 1710♠10♠ 20202× the bet
18810K♦5♥4♣ 192♣Q♠A♣5♣ 1800× the bet
18710K♥Q♠ 20J♦A♣ 21 blackjack252.5945× the bet
18610K♣8♣ 187♦A♥Q♠ 18101× the bet
18510K♣J♥ 203♠7♣J♥ 20101× the bet
184102♥A♥3♥Q♣K♣ 262♠K♦2♦ 14202× the bet
183106♠6♦9♣ 214♦6♣5♠ 15 doubled00× the bet
182106♥10♥5♥ 21K♥K♦ 2000× the bet
181104♣6♣10♥ 203♣Q♥ 1300× the bet
180109♦5♥Q♦ 2410♥K♦ 20202× the bet
1791010♦3♦8♣ 219♥Q♠ 1900× the bet
17810K♣6♦ 163♠K♥K♥ 23 bust00× the bet
177104♦7♥J♠ 217♠K♥ 1700× the bet
1761010♥8♥ 185♣K♦ 15 surrendered50.5× the bet
175104♥6♦4♣Q♠ 245♠6♥10♥ 21 doubled404× the bet
174102♦J♠A♦8♣ 217♣6♣ 1300× the bet
17310J♣4♥K♣ 247♠A♥4♦5♦ 17202× the bet
172105♠7♦3♠6♠ 215♥9♣ 1400× the bet
1711010♣K♦ 206♥3♦J♦ 1900× the bet
1701010♥J♦ 203♥8♠Q♠ 21 doubled404× the bet
16910A♣A♦ 125♠A♣A♠9♦6♦ 22 bust00× the bet
168103♦8♣K♠ 218♠J♣ 1800× the bet
167109♠8♠ 174♠4♦J♠ 18202× the bet
166108♠8♠6♥ 227♥4♦4♠ 15 doubled404× the bet
165107♥A♠ 18A♠2♣J♦2♣9♠ 24 bust00× the bet
164106♦2♠K♠ 189♠3♦ 129♥8♥ 1700× the bet
163107♦6♥ 136♣Q♦10♣ 26 bust00× the bet
162103♦Q♣ 13Q♣A♣ 21 blackjack252.5945× the bet
161104♦J♠4♣ 18A♣9♠ 20202× the bet
16010A♥8♣ 198♠J♥ 1800× the bet
1591010♣2♦ 125♣2♠6♣K♥ 23 bust00× the bet
15810A♦9♣ 202♠9♣J♦ 21202× the bet
157105♠Q♠A♠A♥ 173♥9♦ 1200× the bet
1561010♣9♣ 199♦8♥ 1700× the bet
155106♦5♦K♦ 2110♥Q♦ 2000× the bet
154109♥8♠ 179♥Q♠ 19202× the bet
153102♦6♠4♠K♦ 22K♠J♦ 20202× the bet
15210K♦6♣8♠ 244♥10♥6♦ 20202× the bet
151109♠5♠ 149♥5♥9♦ 23 bust00× 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
7158d056482c183e918766ddf6b5d8d9d42f5e5c3b27852285b75ed002aa9d54
Seed
731fe2c3f2cdc341e164e7156606af3a49d7d9edf30fed9fce1d5078cb666e19 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
203a2198ba3d3877cd280d5acb90b44e
Commitment
Batch 60,248, Merkle root 1b76c64164ac0eca6561f3608a00c38aad768672211167fef7ea878f36582874. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 3eab8b238870af935ca6d5f1b0693c2df2e99f8e4ad5781ff72b156cf2d066c9
  2. 9efc2cab8e3916399a02a92e7d5a90ebe704ea2eb6d60c52f2977f96e07adcb9
  3. 7645a3c5ff2000ee9855b9aa23b38367fcde208d5b6b4187f1d9e1ffb03c5562
  4. 94e90baa28061f9907a21beb1f58966c68bfcd6ceb0a5957eaf52ffb17256f84
  5. 85a2f9d1bbdc09a4ffd777e56cf1d77005e8f1af0d7c5ba4cc709eefaa30c05e
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.