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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
100102♠10♥2♥J♠ 249♣3♣9♠ 21202× the bet
9910J♥2♥ 12Q♦A♥ 21 blackjack252.5945× the bet
98103♥8♠Q♠ 215♥Q♠ 1500× the bet
97103♠J♥6♠ 197♠3♦6♥ 16 doubled00× the bet
96107♥6♥7♦ 203♠4♥Q♦ 1700× the bet
95103♠10♥A♣2♣4♠ 20J♦7♣ 1700× the bet
94109♠J♦ 199♠2♥J♠ 21 doubled404× the bet
93103♦4♠J♦ 177♠5♥A♥ 1300× the bet
92104♥9♦9♦ 22K♣5♥ 15202× the bet
911010♣6♦ 165♥10♦ 15 surrendered50.5× the bet
90104♥8♥8♣ 20Q♥J♠ 20101× the bet
8910K♠K♣ 20J♦8♥ 1800× the bet
88103♠2♠6♠A♣5♠ 179♣7♠ 1600× the bet
87108♦8♦A♠ 174♠5♥2♥6♠ 17101× the bet
86104♣7♦7♣ 184♣K♣ 1400× the bet
85106♦9♣8♠ 23A♦3♣2♣ 16 doubled404× the bet
84105♦5♥8♣ 182♣9♠2♠ 13 doubled00× the bet
83109♣5♣5♦ 1910♥9♠ 19101× the bet
82108♦3♥7♠ 1810♥K♦ 20202× the bet
8110Q♥A♣ 21A♦4♠ 1500× the bet
80107♦5♥Q♣ 227♥10♥ 17202× the bet
7910J♦8♥ 18K♥3♦3♦10♦ 26 bust00× the bet
78106♦K♦5♥ 21A♠5♥J♦ 16 doubled00× the bet
77106♠9♥5♥ 205♥7♥ 1200× the bet
76103♥2♣K♥3♦ 187♠6♣ 1300× the bet
75105♠9♥3♠ 176♥3♦10♦ 19 doubled404× the bet
74104♥A♣3♦ 186♦K♣ 1600× the bet
7310K♠8♥ 18K♥K♣ 20202× the bet
72102♥6♥ 8J♣A♦ 21 blackjack252.5945× the bet
7110Q♥A♥ 214♥2♠ 600× the bet
70105♠5♥7♣ 179♦7♦ 1600× the bet
69103♦Q♠3♠2♦ 187♥3♥6♦ 16 doubled00× the bet
6810A♠10♥ 216♦5♣ 1100× the bet
67108♠J♦ 18J♣2♠7♣ 19202× the bet
6610Q♣7♣ 176♠7♠10♦ 23 bust00× the bet
65109♥5♠ 149♥6♦9♥ 24 bust00× the bet
64107♥5♠ 12A♥10♥ 21 blackjack252.5945× the bet
63106♦8♥ 14A♠10♠ 21 blackjack252.5945× the bet
6210Q♥Q♠ 20J♥8♠ 1800× the bet
61102♥J♠Q♠ 2210♥K♣ 20202× the bet
60105♦8♥6♦ 19Q♦6♦ 1600× the bet
59107♥6♣ 1310♥5♠8♦ 23 bust00× the bet
58105♠4♦6♥J♣ 25J♥J♦ 20202× the bet
57108♥10♣ 189♠3♥9♠ 21202× the bet
56102♥6♣6♠7♦ 213♣10♥ 1300× the bet
5510A♣10♥ 216♠10♠ 1600× the bet
54105♥A♣A♣ 177♥J♠ 17101× the bet
53107♦K♦ 174♦J♦5♠ 19202× the bet
5210K♣9♥ 19J♣J♣ 20202× the bet
5110Q♣7♦ 177♥2♠6♥K♣ 25 bust00× 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.