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

Blackjack

Play moneyended

4c9b42301d24539c38dbddda757c0cd3

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,270 play
Returned
2,105 play
Bettor's net
-165 play
Return
92.73%

Results by hand

Final
Hands
200
played
Pace
21.2/min
overall 20.3/min
Biggest swing
+30
Seat 1 · hand 3

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

SeatNetRateStreak
gbb-165-82.5 play/100won 3

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200103♦3♥4♣9♣ 19K♣Q♦ 20202× the bet
19910J♥6♦7♣ 23K♠10♠ 20202× the bet
198106♥8♣2♦6♠ 223♠2♥J♣ 15202× the bet
197105♥Q♠4♦ 19A♥7♣Q♦ 18 doubled00× the bet
19610J♦K♣ 204♠5♥4♠7♦ 20101× the bet
1951010♦4♠K♣ 247♣K♠ 17202× the bet
194105♥10♠Q♣ 25J♣7♠ 17202× the bet
1931010♦10♣ 20K♣J♠ 20101× the bet
192105♣3♠6♠3♦ 17A♥7♠5♥ 13 doubled00× the bet
19110Q♥K♦ 20K♥4♣10♦ 24 bust00× the bet
19010Q♠10♥ 2010♥5♥ 15 surrendered50.5× the bet
189107♣4♥K♠ 216♦K♣5♥ 21101× the bet
188108♠7♦4♣ 192♠Q♥7♠ 19101× the bet
187109♥3♦ 127♣9♠ 16 surrendered50.5× the bet
186108♦Q♠ 184♥A♥K♣10♥ 25 bust00× the bet
185104♠8♦9♦ 218♥7♠ 1500× the bet
18410J♣2♦ 125♣2♣7♦8♣ 22 bust00× the bet
1831010♠2♦9♦ 216♦3♥3♣8♠ 2000× the bet
182108♦6♣ 143♠2♠10♦9♦ 24 bust00× the bet
181107♦2♥ 96♥J♥7♠ 23 bust00× the bet
180105♥Q♣10♦ 255♣10♦ 15202× the bet
17910J♣8♦ 189♥10♦ 19202× the bet
178104♦3♥Q♦ 17K♦8♥ 18202× the bet
177102♠3♥ 55♥7♦Q♣ 22 bust00× the bet
176103♠2♠ 5A♥J♦ 21 blackjack252.5945× the bet
17510A♣10♥ 217♠3♣ 1000× the bet
174107♣2♦3♥8♦ 205♦3♠A♣ 1900× the bet
173109♦9♠ 184♠Q♣10♣ 24 bust00× the bet
172104♠3♣6♦7♥ 207♥10♦ 1700× the bet
171108♣A♠ 197♦A♣ 1800× the bet
170109♠Q♥ 199♥Q♦ 19101× the bet
169103♠Q♥3♥Q♣ 262♥K♣2♦ 14202× the bet
168109♣4♥ 13A♦6♥7♦9♥ 23 bust00× the bet
167102♦9♦8♦ 19J♠4♣ 1400× the bet
166106♣Q♥3♦ 198♦5♥ 1300× the bet
16510A♣6♣ 175♦8♣9♦ 22 bust00× the bet
1641010♠K♦ 206♣Q♥ 16 surrendered50.5× the bet
16310A♣J♦ 21K♥A♦ 21 blackjack101× the bet
16210J♠2♦4♣9♠ 25J♠8♥ 18202× the bet
1611010♠J♥ 206♠7♣K♣ 23 bust00× the bet
160106♣A♥ 17A♣5♠ 16A♦8♥ 19202× the bet
159102♥8♠10♥ 206♦2♠Q♥ 1800× the bet
15810A♥10♥ 21Q♦3♣ 1300× the bet
157104♥9♣A♦10♣ 242♥3♣10♣ 15202× the bet
156107♠6♥2♣K♥ 256♠4♥A♣ 21 doubled404× the bet
155103♦6♦9♣ 18J♥10♥ 20202× the bet
15410A♦K♥ 217♥7♠ 1400× the bet
15310J♦J♥ 205♥3♣A♦ 1900× the bet
152105♣7♣A♠10♦ 238♠2♦K♣ 20 doubled404× the bet
151103♦8♠2♠K♣ 236♦5♣4♦ 15 doubled404× 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
90b38e72366602160c541568cafa63efc92eaea568a1c008150fce4703f8d346
Seed
1ecc53cfc881a64b5536c9ecd10f5a8744f8967d41ab48e04d7e0111c471af31 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
1637009ef071b73ba5de1f9d2717f66b
Commitment
Batch 58,530, Merkle root 90cbbb2d46f592f1ee4540e574d06f29f65d276b9aeb5fbffc7118f99c8d809b. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 27760b3fd3bb6d38d4d12ebd5de5c76743ac01df19f7b33cdb2b1a2883a3aee1
  2. e081ce6dd90537ee73cb0430f281b95281f6c0b9d342c33bc56d6b60e3350268
  3. 4a95002a3dd1b6da4782ee38e1513f9facff8ccefea3af2da5c1a8ab1d18f464
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.