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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
10010A♠Q♠ 216♠K♦ 1600× the bet
99105♠6♣A♠K♠ 225♠A♠4♦ 20 doubled404× the bet
9810K♥5♣ 153♥J♠J♣ 23 bust00× the bet
97105♠5♦5♣5♥ 207♦5♣ 127♣Q♣ 177♦Q♣ 1700× the bet
961010♥K♣ 20A♣8♠ 1900× the bet
9510Q♦7♥ 175♦8♥6♠ 19202× the bet
9410J♥2♣K♣ 227♠Q♣ 17202× the bet
9310K♠2♠2♣4♦ 18Q♠J♠ 20202× the bet
92108♣Q♠ 1810♣6♠9♦ 25 bust00× the bet
91109♥10♠ 193♠Q♣5♣ 1800× the bet
90108♠8♦10♠ 265♦6♠Q♣ 21 doubled404× the bet
8910A♥10♠ 217♦10♠ 1700× the bet
8810K♣8♦ 185♠2♠8♥9♠ 24 bust00× the bet
87105♥K♠2♣ 172♠J♥ 1200× the bet
8610K♣5♣ 159♠3♣J♦ 22 bust00× the bet
85106♥A♦ 1710♥4♥ 1400× the bet
84107♥Q♥ 17A♠Q♥ 21 blackjack252.5945× the bet
83102♦5♣4♣8♣ 198♠9♦ 1700× the bet
8210A♠3♦ 142♥10♠K♣ 22 bust00× the bet
8110Q♣A♥ 2110♥8♠ 1800× the bet
80109♦J♥ 198♠J♣ 1800× the bet
7910J♥3♥ 1310♦A♣ 21 blackjack252.5945× the bet
78102♦9♦8♣ 194♠9♠ 1300× the bet
77105♥9♣7♣ 21K♠6♠ 1600× the bet
761010♠J♠ 204♣A♥6♥ 21202× the bet
75106♦7♠Q♥ 232♣4♣Q♦ 16202× the bet
741010♠10♥ 209♠10♦ 1900× the bet
73103♣9♠ 122♣Q♣K♥ 22 bust00× the bet
72102♦10♦10♦ 22Q♣10♣ 20202× the bet
7110J♥3♠ 1310♦3♦K♦ 23 bust00× the bet
7010J♦J♠ 2010♣J♣ 20101× the bet
691010♣5♦ 155♥10♦ 15 surrendered50.5× the bet
68105♦A♣4♠ 207♠9♥ 1600× the bet
67109♦4♦J♦ 233♠K♠5♥ 18202× the bet
66104♥3♣K♥ 172♠9♥10♦ 21 doubled404× the bet
65105♥2♠2♦9♠ 187♣K♣ 1700× the bet
64108♥5♥7♠ 204♥A♠3♠ 1800× the bet
6310J♥7♠ 176♠5♦6♣ 17 doubled202× the bet
6210Q♦3♦6♥ 197♦J♣ 1700× the bet
6110A♥3♠ 1410♣6♠ 16 surrendered50.5× the bet
60109♣7♦4♣ 203♥A♥5♥ 1900× the bet
591010♦J♠ 2010♥5♣ 15 surrendered50.5× the bet
5810J♥8♥ 18A♥8♥ 19202× the bet
57104♣7♣5♠Q♠ 269♦J♦ 19202× the bet
56103♦Q♣J♣ 238♦10♦ 18202× the bet
55108♥4♣5♦ 172♥9♠A♠ 12 doubled00× the bet
54109♣Q♣ 19J♠Q♥ 20202× the bet
53105♦7♠3♥3♥ 187♣A♥8♥ 16 doubled00× the bet
5210J♦10♦ 20A♥6♣J♠ 1700× the bet
511010♠J♥ 206♥2♠2♦8♥ 1800× 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.