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

Blackjack

Play moneyended

3400628fcba2bd5c093dbd587ffe73c2

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,290 play
Returned
2,430 play
Bettor's net
+140 play
Return
106.11%

Results by hand

Final
Hands
200
played
Pace
20.8/min
overall 20.2/min
Biggest swing
+50
Seat 1 · hand 145

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

SeatNetRateStreak
gbb+140+70.0 play/100lost 1

Last hands

  1. 200Even0
  2. 199Seat 1+10
  3. 198Seat 1+10
  4. 197Even0
  5. 196Seat 1+15
  6. 195Seat 1+10
  7. 194Even0
  8. 193Seat 1+10
  9. 192Seat 1+15
  10. 191Seat 1+15
  11. 190Seat 1+10
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
200107♦9♦ 166♥J♦8♦ 24 bust00× the bet
199103♣9♦4♣6♥ 227♦8♠ 15202× the bet
198108♥K♣ 18J♣10♣ 20202× the bet
19710J♦A♥ 21Q♦6♣ 1600× the bet
19610A♠9♠ 20A♣10♥ 21 blackjack252.5945× the bet
195105♣A♠J♦8♣ 244♣2♣5♦4♦ 15202× the bet
194109♣A♦ 204♦J♦5♣ 1900× the bet
193103♥5♠7♣8♥ 23K♦J♦ 20202× the bet
19210A♦8♥ 19A♦J♠ 21 blackjack252.5945× the bet
1911010♣7♣ 1710♠A♣ 21 blackjack252.5945× the bet
19010A♥A♥6♣ 18A♦8♥ 19202× the bet
18910J♠K♣ 20J♠3♦2♥10♥ 25 bust00× the bet
188105♠J♠Q♣ 253♥J♦ 13202× the bet
187103♠9♣9♥ 217♥9♠ 1600× the bet
18610K♣7♦ 173♥6♣5♥A♣3♥ 18202× the bet
18510K♠5♣7♠ 223♠A♦6♠ 20202× the bet
184109♦4♦ 135♠3♣4♥A♥10♦ 23 bust00× the bet
18310J♠7♥ 1710♦8♦ 18202× the bet
18210K♠K♠ 20K♠5♣ 15 surrendered50.5× the bet
181104♥4♠J♣ 186♦A♣5♣ 12 doubled00× the bet
18010Q♣4♣9♥ 236♥8♠6♠ 20202× the bet
179105♥K♠9♦ 24Q♦2♠ 12202× the bet
17810J♣2♠6♣ 189♠9♣ 18101× the bet
177102♠J♣5♦ 174♣K♦ 1400× the bet
176104♣8♠A♣9♣ 227♣2♦4♥ 13 doubled404× the bet
175108♦10♠ 18Q♠A♠ 21 blackjack252.5945× the bet
1741010♠4♣4♥ 183♠2♠8♥5♠ 18101× the bet
17310Q♦J♥ 204♥6♥5♠J♠ 25 bust00× the bet
17210J♥K♥ 208♠4♣J♠ 22 bust00× the bet
171103♥K♠2♣6♥ 212♣9♦J♣ 21 doubled202× the bet
170103♠Q♣9♠ 2210♠K♣ 20202× the bet
16910J♥7♥ 1710♥4♠K♣ 24 bust00× the bet
168102♦4♣5♠K♦ 219♦8♥ 179♥A♠ 2000× the bet
167102♥2♣J♥8♦ 22Q♥8♣ 18202× the bet
16610J♠9♦ 198♥K♠ 1800× the bet
165104♣J♦8♦ 227♣3♥2♦ 12 doubled404× the bet
164105♠A♥7♣K♦ 238♦A♥ 19202× the bet
16310J♣10♥ 208♠J♦ 1800× the bet
16210J♦8♦ 18Q♥K♦ 20202× the bet
16110K♥Q♦ 204♥3♣10♦ 1700× the bet
160105♣3♠K♦ 186♦7♦ 1300× the bet
159103♥7♦6♠3♥ 19A♥Q♠ 21A♦7♦ 18202× the bet
158104♥2♥K♠J♦ 26A♠6♣7♦ 14 doubled404× the bet
1571010♦A♦ 219♠6♥ 1500× the bet
156104♣K♣6♠ 207♣4♥J♦ 21 doubled404× the bet
1551010♥8♠ 183♦2♠5♠K♠ 20202× the bet
15410Q♥10♣ 207♦J♣ 1700× the bet
153109♥J♥ 19K♣4♠J♥ 24 bust00× the bet
152104♣7♣Q♣ 215♥10♣ 1500× the bet
15110Q♥6♠A♦ 17K♦10♠ 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
b0f17e5108d3583414cfa0d27a88b1af15d3161b4b6ffa8d1fba5d98fccefd51
Seed
583c6936be5114916a0930e9567a9c4a853ace062609e49bc45d0bdc4f01df15 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
f77513fc316ba7e6252facadf13dd972
Commitment
Batch 54,705, Merkle root 05ec86737bfbde38b337d077976a47474f4eb35b4094450ca959e0727225b2d5. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 718700280035f0232b4431b39fef666a8b80c042d7b26f30ac215ace9b8a1c13
  2. 5843b8e2627444d273fcd75775d824e8e952c89fbb24bf89c1f031dc965568c2
  3. 3c816204997d5ca925ae05f05e420ea0a72327890525ded305b36a82a8c5bcf9
  4. 611440f540c368e8647c0b405af50bd4d2bab847cb1ecf568a89628418b2704e
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.