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

Blackjack

Play moneyended

c33ae80bc1244640d50a1b7346cfba8f

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,340 play
Returned
2,225 play
Bettor's net
-115 play
Return
95.09%

Results by hand

Final
Hands
200
played
Pace
17.8/min
overall 20.0/min
Biggest swing
-40
Seat 1 · hand 180

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

SeatNetRateStreak
gbb-115-57.5 play/100won 1

Last hands

  1. 200Seat 1+10
  2. 199Even0
  3. 198Seat 1+10
  4. 197Seat 1+20
  5. 196Even0
  6. 195Seat 1+10
  7. 194Seat 1+10
  8. 193Seat 1+20
  9. 192Even0
  10. 191Seat 1+10
  11. 190Seat 1+10
  12. 189Seat 1+10

The hands

Newest first
#BetDealerHandsPaidChecked
200104♥J♣10♣ 24Q♣6♦ 16202× the bet
19910Q♣K♣ 20J♠7♥ 1700× the bet
198105♠Q♠J♥ 258♠5♥ 13202× the bet
197107♠Q♠ 175♣6♦10♠ 21 doubled404× the bet
196108♣K♣ 18J♣3♠Q♣ 23 bust00× the bet
195103♦7♠3♥10♦ 2310♦3♦ 13202× the bet
194107♦9♦6♣ 228♠Q♠ 18202× the bet
193102♦3♠8♣3♠6♦ 222♦8♥K♠ 20 doubled404× the bet
19210Q♠J♠ 205♥4♥2♠A♥2♠3♦ 1700× the bet
1911010♣3♣Q♣ 235♣7♠5♦ 17202× the bet
190109♣5♣8♥ 229♥5♠A♣6♥ 21202× the bet
189108♥3♣2♠7♥ 202♣Q♣2♣7♣ 21202× the bet
18810K♣K♥ 20A♥4♥A♦K♦8♥ 24 bust00× the bet
187104♣6♦4♥5♣ 198♦Q♦ 1800× the bet
186103♣7♠A♥ 212♥K♦9♥ 212♦Q♣5♠ 17101× the bet
185109♣9♦ 184♣5♦3♥J♥ 22 bust00× the bet
18410K♥10♥ 20J♣8♠ 1800× the bet
183105♦K♥6♥ 215♠K♠ 1500× the bet
182105♥10♠Q♠ 252♠8♠A♦ 21 doubled404× the bet
181105♣4♥3♥8♥ 20Q♥10♦ 20101× the bet
18010Q♣J♥ 208♣4♠5♦ 178♦9♥ 178♠J♠ 188♠5♦Q♣ 23 bust00× the bet
179104♠3♥6♥10♦ 233♣K♣ 13202× the bet
178102♦K♦ 12Q♣A♦ 21 blackjack252.5945× the bet
177104♥5♦J♦ 192♦K♣ 122♦10♠ 1200× the bet
17610Q♥Q♠ 206♥J♥ 16 surrendered50.5× the bet
175104♣7♥A♠3♠6♦ 217♦6♠ 1300× the bet
174105♠8♣Q♥ 237♣8♦ 15202× the bet
173103♥3♥8♥6♥ 206♥5♠6♠ 17 doubled00× the bet
172105♠4♣6♥9♠ 244♦8♣ 12202× the bet
171106♠J♠2♥ 18J♠7♣ 1700× the bet
17010Q♠6♣ 164♠K♣10♣ 24 bust00× the bet
169103♥7♠9♥ 19J♥7♥ 1700× the bet
16810A♦10♥ 212♣A♠ 1300× the bet
16710K♣J♠ 206♠Q♣ 16 surrendered50.5× the bet
166105♣10♣8♦ 23K♠J♣ 20202× the bet
165105♠9♠Q♥ 248♦10♠ 18202× the bet
16410Q♥Q♠ 204♦10♥A♦4♦ 1900× the bet
163108♦5♣3♣2♥ 187♣3♦6♠ 16 doubled00× the bet
162102♦3♣2♣2♥10♣ 194♥5♥8♣ 1700× the bet
161107♥2♣2♣Q♣ 219♥A♣ 2000× the bet
160103♦K♥A♥6♥ 204♥6♥8♣ 18 doubled00× the bet
159105♥3♥4♦K♥ 224♦5♣A♣ 20 doubled404× the bet
15810A♥9♣ 206♦9♦5♦ 20101× the bet
15710A♥8♥ 1910♠7♦ 1700× the bet
156102♣5♠4♠2♦8♠ 214♦4♠K♠ 1800× the bet
15510J♣J♥ 20A♣K♦ 21A♣2♥ 13202× the bet
1541010♥J♠ 20J♦Q♣ 20101× the bet
153109♦5♥ 1410♦2♥K♦ 22 bust00× the bet
152109♠5♥2♥K♥ 26K♥K♥ 20202× the bet
151108♦9♦ 178♣A♥ 19202× 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
f6547a23916cfd7363690cf79e1c65a452d02532f6db436d03bbe0c09818f71e
Seed
fdeca05e06c98ead9a9661b3a84fbae3a8d50af4ba70139428d397c34282f44c SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
d14eb5aeb1c7be1af6810477853e0bf5
Commitment
Batch 57,487, Merkle root b30d13379d5a9ddab06a5a7f75896275157e1d04d7cfbd4c3ed6b615b3849671. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. da061e7cc74e664f5b3c36cdd6dc699839502a78f6993f4e384551343d97c969
  2. 680ec73ee57fa7fd40974638ae0c53e9a62b3a6c2a624fa67bbca6997941033e
  3. 9d9a44455a16b68ef193e28251ed27d108711c4af5ebdf9706396176cd964bde
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.