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

Blackjack

Play moneyended

9497114562815e3f6aea4a6a24cd6948

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,180 play
Returned
2,150 play
Bettor's net
-30 play
Return
98.62%

Results by hand

Final
Hands
200
played
Pace
22.2/min
overall 21.8/min
Biggest swing
+30
Seat 1 · hand 122

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

SeatNetRateStreak
gbb-30-15.0 play/100won 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200103♠A♣4♣ 182♠J♠7♠ 19202× the bet
199105♦7♥3♣5♦ 209♣8♣ 1700× the bet
1981010♠9♣ 197♥8♦ 15 surrendered50.5× the bet
197107♥J♠ 178♣10♦ 18202× the bet
196106♥2♦K♠ 185♠4♣9♠ 18 doubled202× the bet
195105♠7♣9♦ 212♦Q♠ 1200× the bet
19410Q♥K♠ 208♥J♥ 1800× the bet
193107♠4♦ 114♠J♣8♠ 22 bust00× the bet
192108♠6♥ 143♣K♥2♠Q♥ 25 bust00× the bet
191108♠4♣K♠ 223♦10♦6♠ 19202× the bet
19010J♠J♣ 209♣10♥ 1900× the bet
189104♠A♥J♠6♣ 213♠10♦ 1300× the bet
18810A♣5♣Q♠K♣ 268♠6♣4♣ 18202× the bet
1871010♦K♦ 20J♦J♠ 20101× the bet
18610Q♥Q♣ 203♦7♣6♣4♥ 20101× the bet
185105♥2♣4♥10♥ 21Q♠Q♦ 2000× the bet
184104♥9♠8♣ 21K♠10♣ 2000× the bet
183107♠9♣ 163♠10♠K♣ 23 bust00× the bet
182107♥2♦J♦ 199♣9♠ 1800× the bet
181103♠6♥9♣ 187♠8♦ 1500× the bet
180106♣2♣7♣8♦ 239♣7♥ 16202× the bet
179103♠2♠ 510♣A♦ 21 blackjack252.5945× the bet
17810Q♥K♣ 207♦7♥9♠ 23 bust00× the bet
177103♥4♣9♣8♠ 246♠4♥6♠ 16 doubled404× the bet
17610Q♣10♣ 203♣10♥K♣ 23 bust00× the bet
175104♣10♥J♦ 24J♥5♣ 15202× the bet
1741010♦3♥ 13A♠Q♥ 21 blackjack252.5945× the bet
1731010♦10♦ 202♥J♠10♠ 22 bust00× the bet
172104♣4♥7♣2♠ 17Q♦3♠ 1300× the bet
17110A♥9♣ 209♣Q♣ 1900× the bet
1701010♥5♥K♠ 257♥J♦ 17202× the bet
1691010♦3♦3♣4♥ 205♦2♣A♣9♦ 1700× the bet
168104♦2♣J♥3♦ 193♠6♦3♠ 12 doubled00× the bet
167102♠9♣6♣ 172♦A♠10♦ 1300× the bet
16610A♠Q♠ 215♦10♥ 1500× the bet
165104♠7♠A♦2♥10♦ 246♦5♠A♥ 12 doubled404× the bet
1641010♥8♠ 18A♦3♥7♦ 21202× the bet
163104♦7♠A♣Q♦ 22Q♥8♣ 18202× the bet
162107♣4♦Q♦ 217♣Q♥ 1700× the bet
161103♠Q♥2♣4♦ 19K♥8♥ 1800× the bet
160102♦3♦6♦3♠6♦ 20J♥3♠ 1300× the bet
1591010♣K♠ 209♣5♥Q♠ 24 bust00× the bet
158102♠A♠J♦Q♣ 234♦A♣Q♦ 15202× the bet
157102♥10♠ 12A♠Q♥ 21 blackjack252.5945× the bet
1561010♣4♠9♣ 232♥3♥K♦6♥ 21202× the bet
15510A♠10♠ 216♦Q♦ 1600× the bet
15410J♥K♥ 2010♦3♣Q♥ 23 bust00× the bet
15310A♦K♥ 21A♠K♠ 21 blackjack101× the bet
1521010♦A♠ 218♥A♦ 1900× the bet
1511010♣4♥Q♦ 243♣A♠7♠ 21202× 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
aedf0ce896859adf6e9920c4aecf39a783cc9e830080c825bc6cb6792870c838
Seed
d17fbef98ec7052f2bf70adb724f259849badde91cdd705cba4e598ec8fb91a0 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
2b8b092602294fc24acfeaf1450fa4c5
Commitment
Batch 51,018, Merkle root dec98f670ed74a2b16a9c991094b270376627089d1663e236ae22dcc8272a5d6. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 54ce6e25c911066ae7010c9aed4b78d914c94786eae87f7ffb1fc72ac7260bbc
  2. a5773370a38d22ade3d99b51ad8877552165fb86268115383b04087100b3843f
  3. e697678f9f4545691b9a43c07f66eff9959aa700f7f380639da383c7dd5a4db4
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.