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

Blackjack

Play moneyended

ff3075d95ab6999b4525a904c7d7a85d

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,270 play
Returned
2,015 play
Bettor's net
-255 play
Return
88.77%

Results by hand

Final
Hands
200
played
Pace
19.9/min
overall 20.8/min
Biggest swing
-30
Seat 1 · hand 53

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

SeatNetRateStreak
gbb-255-127.5 play/100lost 5

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
20010Q♣Q♦ 206♥10♠ 16 surrendered50.5× the bet
199108♥4♥ 126♦10♣10♥ 26 bust00× the bet
19810Q♣K♠ 2010♥K♥ 20101× the bet
19710Q♦J♣ 20Q♠Q♥ 20101× the bet
19610K♦A♠ 217♥2♥ 900× the bet
195102♥8♠J♦ 203♦9♥6♠ 1800× the bet
194108♠J♣ 184♣5♣7♥Q♣ 26 bust00× the bet
193104♥2♣Q♠10♦ 269♦2♦A♣ 12 doubled404× the bet
192102♠4♣7♠7♣ 20K♥10♠ 20101× the bet
191104♥6♥J♣ 208♦4♣ 128♠Q♣ 188♦5♣ 1300× the bet
190102♣7♣J♠ 193♦4♣8♦ 1500× the bet
189107♣J♥ 176♣7♠5♣ 18202× the bet
188108♦4♣7♥ 19J♥K♣ 20202× the bet
18710K♠3♥3♦7♠ 235♠6♠5♦ 16 doubled404× the bet
1861010♦9♦ 19Q♣8♦ 1800× the bet
18510Q♣A♣ 212♠K♥ 1200× the bet
18410A♣Q♥ 21Q♥Q♦ 2000× the bet
1831010♥7♥ 178♦6♠Q♥ 24 bust00× the bet
18210J♣J♣ 205♠J♥ 15 surrendered50.5× the bet
181105♣9♠3♠ 17K♣3♦ 1300× the bet
180103♦7♥7♦ 17A♠2♣2♦6♦ 21202× the bet
179109♠4♠4♦ 179♦5♣A♦4♣ 19202× the bet
178106♦6♦K♣ 22J♦Q♦ 20202× the bet
177104♦10♣2♦7♠ 23A♠6♠7♦ 14 doubled404× the bet
1761010♥9♠ 195♥2♦7♥2♥9♥ 25 bust00× the bet
1751010♠8♠ 18A♥7♠9♦ 1700× the bet
174105♣6♥3♦4♣ 18J♦8♠ 18101× the bet
17310K♦9♣ 19J♣9♠ 19101× the bet
172105♠10♦7♥ 2210♣9♠ 19202× the bet
17110Q♠7♦ 178♥A♠ 19202× the bet
170108♠6♦5♦ 194♠K♠3♣ 1700× the bet
16910K♥A♣ 217♣A♠ 1800× the bet
168107♣6♦2♣2♠ 17A♠5♦8♥3♣ 17101× the bet
16710K♣5♠ 158♦4♠2♣10♠ 24 bust00× the bet
166105♠J♠2♣ 17Q♥Q♥ 20202× the bet
165106♠9♥J♠ 258♠Q♠ 18202× the bet
1641010♦2♣ 127♥5♣10♣ 22 bust00× the bet
163104♣J♣K♣ 245♦6♦9♠ 20 doubled404× the bet
162106♠A♣ 17A♠10♠ 21 blackjack252.5945× the bet
161109♥8♦ 17J♥2♠4♥8♠ 24 bust00× the bet
16010K♠A♣ 2110♣Q♠ 2000× the bet
15910Q♥3♦ 139♦7♠ 16 surrendered50.5× the bet
158107♣7♥J♣ 242♣7♠9♥ 18202× the bet
157104♦5♦Q♠ 1910♠7♠ 1700× the bet
15610Q♠7♦ 179♣9♠ 18202× the bet
155106♠10♦4♣ 207♠K♠ 177♣10♦ 1700× the bet
154107♣7♣ 1410♣6♥J♣ 26 bust00× the bet
153102♥5♦7♣J♥ 249♣J♥ 19202× the bet
152102♣2♣6♦Q♥ 20A♦7♦ 1800× the bet
151108♥8♠A♣ 172♥2♠8♠2♠6♣ 20202× 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
f13db1d343b37b5743b1f07101f7086128a6491b24954271d3fe22c7c65ac691
Seed
28ae3f0df008440fe14c2752e07c2bc313190f57c4db910298a013a6f45b54b9 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
000dfc1dacd887e9e477042f1c886508
Commitment
Batch 58,501, Merkle root 24816a42cd0aa30d82f21e40d0cd2541d9d9b5f5faf8c2bca7e69b0740a1defa. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 61bd834c35d576749e86289216344e0f905018794a37ab85808e1eaafd0b78f3
  2. b5e9fd12e4a2b4f6b0c7a4fe05e491c33e9293f9a04a821010a7a0e5d95cd087
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.