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

Blackjack

Play moneyended

7f9e69241a288680b37017f39f8b6100

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,390 play
Returned
2,295 play
Bettor's net
-95 play
Return
96.03%

Results by hand

Final
Hands
200
played
Pace
20.7/min
overall 17.1/min
Biggest swing
+40
Seat 1 · hand 109

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

SeatNetRateStreak
gbb-95-47.5 play/100lost 4

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200106♣9♠5♥ 20J♣9♥ 1900× the bet
199109♦K♦ 196♠3♠9♠ 1800× the bet
19810K♠10♥ 206♠Q♦ 16 surrendered50.5× the bet
197104♣J♠3♦ 174♥9♣ 1300× the bet
196104♦9♠3♥Q♥ 265♣2♣7♠ 14202× the bet
19510K♦7♦ 176♥4♥4♦7♠ 21202× the bet
1941010♥3♣4♠ 179♦9♦ 18202× the bet
19310K♦J♦ 20J♥J♠ 20101× the bet
192108♠5♥ 139♦3♥A♦Q♣ 23 bust00× the bet
191105♥Q♦4♠ 197♠3♣4♥ 14 doubled00× the bet
190107♣4♦ 119♥5♣J♠ 24 bust00× the bet
189104♠2♣K♠10♠ 263♥7♦9♥ 19 doubled404× the bet
18810Q♥A♣ 216♠3♣ 900× the bet
187103♣3♣4♠Q♦ 207♥A♠10♠ 18 doubled00× the bet
186106♦9♠8♣ 236♠7♠ 13202× the bet
1851010♠A♠ 2110♥A♠ 21 blackjack101× the bet
184108♠7♣Q♠ 2510♣10♣ 20202× the bet
18310J♠9♦ 195♣A♠3♥ 19101× the bet
182105♦4♦6♣9♠ 249♠2♠A♥ 12 doubled404× the bet
1811010♦A♦ 212♠6♦ 800× the bet
180105♠A♠9♦2♦ 175♥7♣ 1200× the bet
17910Q♦8♦ 185♥3♠4♦10♣ 22 bust00× the bet
1781010♣4♦ 142♣10♦A♣K♥ 23 bust00× the bet
177107♠8♦ 15A♦J♣ 21 blackjack252.5945× the bet
1761010♣A♣ 2110♠10♦ 2000× the bet
175106♠4♦ 10A♠Q♣ 21 blackjack252.5945× the bet
174104♣3♥Q♣ 178♠6♠ 148♠10♣ 18202× the bet
173109♣9♠ 187♠7♣K♠ 24 bust00× the bet
1721010♠A♣ 212♥K♣ 1200× the bet
171103♥3♠ 6A♥Q♣ 21 blackjack252.5945× the bet
170107♣J♦ 178♦10♠ 18202× the bet
169103♥9♠K♠ 228♣6♠ 148♥6♣ 14404× the bet
168102♠3♣Q♠2♣ 176♥5♥A♥ 12 doubled00× the bet
16710A♣J♥ 21A♥10♦ 21 blackjack101× the bet
166109♠5♣A♥A♣8♦ 249♥2♠J♣ 21 doubled404× the bet
16510K♠3♦2♥8♦ 234♣9♥3♣4♣ 20202× the bet
164108♦K♦ 18A♥6♣7♥6♥ 20202× the bet
163103♠J♥K♣ 23J♠7♥ 17202× the bet
1621010♥4♦ 145♣10♦ 15 surrendered50.5× the bet
1611010♣J♠ 202♥7♣K♠ 1900× the bet
160105♥9♥7♠ 213♦A♠8♣ 12 doubled00× the bet
159102♦9♦ 112♠3♣A♦6♣10♥ 22 bust00× the bet
158107♠J♠ 175♣3♥5♠3♣5♥ 21202× the bet
157105♦6♥ 11Q♣A♠ 21 blackjack252.5945× the bet
156103♠3♠10♥10♠ 263♥9♠7♥ 19202× the bet
155103♠J♦5♣ 189♣4♥ 139♥2♠3♣ 14 doubled00× the bet
154105♠4♦A♦ 209♥K♥ 1900× the bet
153109♦10♣ 19Q♦10♠ 20202× the bet
152103♦A♥5♣ 199♠2♣7♣ 18 doubled00× the bet
151106♥A♦ 17A♥2♣ 13A♥7♣ 18202× 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
083351670e73b6dd77c60a47a717092c67f06d6610ae3705fc00cbf6bb16925a
Seed
bffc0c1bb6150cd069b5c7965013be978d5218db6493d8335975fab028802293 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
2b1e989f431500fa06f23ef60be59b2a
Commitment
Batch 47,270, Merkle root 6f208a020096855c915bd4e068121f86b5042a861776af31b8c3fa76864e2aad. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 394e0c2c328239d545aef4a32a6284372f4f01cbb80f956af1f621a2ef68ebc2
  2. 9e1aa3095cd0c439433d408ca7d35d2dc9b30c25c75c9fa49f2b915661d1d385
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.