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

Blackjack

Play moneyended

302f740e5b560bb2b8ebe96411eb59ed

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,200 play
Returned
1,890 play
Bettor's net
-310 play
Return
85.91%

Results by hand

Final
Hands
200
played
Pace
20.8/min
overall 20.7/min
Biggest swing
+20
Seat 1 · hand 3

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. 195Even0
  7. 194Even0
  8. 193Even0
  9. 192Even0
  10. 191Even0
  11. 190Seat 1+10
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
20010Q♥4♦ 14K♥5♦ 15 surrendered50.5× the bet
199109♦J♠ 195♦9♦K♠ 24 bust00× the bet
198106♣7♣10♦ 237♣9♦ 16202× the bet
197103♥3♥ 62♦10♣J♥ 22 bust00× the bet
19610Q♥6♥ 163♠K♦2♠8♠ 23 bust00× the bet
1951010♠Q♥ 209♥4♦2♠K♣ 25 bust00× the bet
1941010♦4♥ 148♣5♠9♦ 22 bust00× the bet
1931010♥10♣ 20K♣6♥ 16 surrendered50.5× the bet
192102♥Q♠7♥ 194♠10♥ 1400× the bet
191108♣2♥ 103♦5♠5♦K♥ 23 bust00× the bet
190108♣4♣6♥ 185♣9♠6♣ 20202× the bet
18910J♠Q♣ 207♣9♥ 16 surrendered50.5× the bet
1881010♦7♠ 17Q♥4♣Q♦ 24 bust00× the bet
187105♠Q♥K♥ 252♥Q♣ 12202× the bet
186105♥3♣2♣7♦ 178♠K♥ 18202× the bet
18510A♣Q♦ 21J♠9♦ 1900× the bet
184108♣K♠ 183♦2♣K♠10♣ 25 bust00× the bet
18310A♠Q♣ 212♣5♣ 700× the bet
182108♣9♠ 176♣6♠4♦A♠ 17101× the bet
1811010♣K♣ 203♣J♦2♣10♠ 25 bust00× the bet
18010Q♣Q♠ 209♣J♣ 1900× the bet
17910K♣Q♠ 202♠K♥5♦ 1700× the bet
1781010♥Q♥ 205♠J♦ 15 surrendered50.5× the bet
17710J♥8♣ 185♣6♠Q♠ 21 doubled404× the bet
176106♣7♠3♠7♣ 233♠J♣ 13202× the bet
175107♦9♥10♦ 265♦6♠4♥ 15 doubled404× the bet
174107♥10♠ 176♣J♥5♣ 21202× the bet
173106♠9♠9♣ 2410♣9♠ 19202× the bet
172108♣A♦ 198♥Q♦ 1800× the bet
1711010♣3♥ 132♠6♦7♠Q♠ 25 bust00× the bet
17010K♠8♣ 187♦J♠ 1700× the bet
16910Q♥J♣ 207♠K♥ 1700× the bet
168104♠7♠2♦K♠ 23A♦8♥ 19202× the bet
167109♦J♦ 197♦2♦3♦10♥ 22 bust00× the bet
166107♥3♥6♦2♥ 18A♣5♣8♣7♦ 21202× the bet
1651010♥2♣ 12A♠7♥4♠A♥10♦ 23 bust00× the bet
16410Q♠K♥ 204♥A♥J♠A♥J♠ 26 bust00× the bet
163105♣Q♣ 1510♠A♠ 21 blackjack252.5945× the bet
16210A♥K♦ 21J♣7♣ 1700× the bet
161102♦5♥7♣A♣K♠ 2510♥10♣ 20202× the bet
160103♠A♥Q♥A♠3♣ 186♦J♠ 1600× the bet
15910K♥J♠ 205♦2♦10♣ 1700× the bet
15810A♦7♦ 182♣2♠J♦5♥ 19202× the bet
15710A♣7♠ 18A♦3♦2♦K♠J♦ 26 bust00× the bet
15610J♠K♣ 20A♠5♠6♣8♦ 20101× the bet
155107♣3♣8♦ 182♠A♦8♠ 21202× the bet
15410J♣8♠ 186♠J♠ 16 surrendered50.5× the bet
15310K♠K♣ 207♥7♠Q♦ 24 bust00× the bet
15210J♠7♠ 173♣5♦K♦ 18202× the bet
15110K♥A♦ 218♣4♦ 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
af5c59a67b68a2b0a7f4f7dcf16d82a872396544eb6beb06638c72ae1451068a
Seed
4d41ebeeb3bb6071c81fba20b16953ed5a85a5e003d98841b7f9b58235742318 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
a39e6530dcd7dc38e2670a355e60e2f5
Commitment
Batch 52,793, Merkle root 638b097c1cb8b362b58a931e6541e45bf0359d70069f642fe79a03b339bda0d9. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 497a6403d2f5c32e854a19dda39ecaf2285e32a154640197b6839d87eb6ee30a
  2. 7081cf07ca93b1fcbfb0ca7411eae834466154aa6d1e4e879cff17573683d995
  3. 1d6d340a31682d78ac8aec640c6503979b8e53fd8969a13bf8072460ba32136f
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.