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

Blackjack

Play moneyended

c069d65521065709c6e9830e1c0ba6f4

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,300 play
Returned
2,280 play
Bettor's net
-20 play
Return
99.13%

Results by hand

Final
Hands
200
played
Pace
21.1/min
overall 21.5/min
Biggest swing
-20
Seat 1 · hand 7

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

SeatNetRateStreak
gbb-20-10.0 play/100lost 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
100108♠10♠ 184♦A♣Q♠Q♥ 25 bust00× the bet
9910Q♥A♣ 212♥3♣ 500× the bet
98102♦9♥A♠J♥ 228♥A♥ 19202× the bet
97108♦4♠ 12K♥A♣ 21 blackjack252.5945× the bet
96104♣5♥7♦8♥ 243♣10♠ 13202× the bet
95108♦K♣ 185♠5♥2♥ 12 doubled00× the bet
94103♦Q♣K♣ 235♥5♦10♦ 20 doubled404× the bet
9310K♣4♥5♣ 193♣8♦10♥ 21 doubled404× the bet
92104♥2♠4♣A♦ 2110♦5♣ 1500× the bet
911010♣8♠ 184♥4♣4♥6♦ 18101× the bet
90104♠2♠10♦6♠ 226♣9♣ 15202× the bet
89102♠5♠3♥Q♦ 2010♣3♦ 1300× the bet
88109♦7♣8♠ 246♣6♠A♠5♠ 18202× the bet
8710K♥Q♥ 20K♦K♥ 20101× the bet
8610J♦3♠ 1310♣3♥A♦9♣ 23 bust00× the bet
8510Q♦3♠ 137♣9♣ 16 surrendered50.5× the bet
8410Q♥2♣ 129♦7♣ 16 surrendered50.5× the bet
8310A♠Q♦ 214♠3♣ 700× the bet
82106♥5♠2♣4♥ 174♣8♥ 1200× the bet
81105♠J♣K♣ 25J♦3♠ 13202× the bet
8010A♣10♠ 219♠10♦ 1900× the bet
79106♣K♣Q♠ 264♠9♥ 13202× the bet
78109♣10♣ 19J♣9♥ 19101× the bet
7710Q♣9♣ 199♥9♣ 1800× the bet
7610J♥5♣6♠ 214♠4♠K♣ 1800× the bet
75102♣Q♦6♦ 18A♠6♣K♦ 1700× the bet
74104♣J♠8♣ 2210♥5♣ 15202× the bet
731010♠A♥ 213♥J♥ 1300× the bet
72108♥8♦4♣ 20Q♦10♠ 20101× the bet
71103♥Q♠2♥K♥ 256♦2♠4♦A♠ 13202× the bet
7010K♥8♠ 185♣6♠2♦ 13 doubled00× the bet
69104♥J♦5♠ 199♦A♠ 20202× the bet
6810J♠9♠ 19A♥6♦ 17A♦10♣ 21202× the bet
6710K♣8♣ 187♦A♣A♣ 19202× the bet
66106♠9♥4♥ 193♥7♥8♠ 18 doubled00× the bet
65102♥3♠8♠4♣ 1710♦3♦ 1300× the bet
64109♣8♥ 173♣J♦3♦7♦ 23 bust00× the bet
6310A♠Q♥ 219♥8♠ 1700× the bet
62103♦J♥7♥ 20A♣7♣8♣ 16 doubled00× the bet
61105♣4♠9♠ 18Q♥4♦ 1400× the bet
6010A♦K♦ 213♠9♣ 1200× the bet
5910K♠Q♣ 208♣A♥ 1900× the bet
5810J♦7♥ 176♣4♥6♥A♥ 17101× the bet
57107♦5♦ 1210♥A♣ 21 blackjack252.5945× the bet
56107♣J♦ 17A♦3♦J♦2♣5♥ 21202× the bet
5510J♣10♦ 203♣K♣2♠Q♣ 25 bust00× the bet
5410A♠3♣5♥ 198♦A♦ 198♠5♥10♠ 23 bust101× the bet
5310A♦6♥ 172♦J♦6♣ 18202× the bet
5210K♣K♠ 20Q♣5♦ 15 surrendered50.5× the bet
5110A♦8♦ 19K♥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
39af4c0127f7b3dffb42d1bc2844601c7386214b2d071debb217f9c5b3471158
Seed
1f50a36082488d93974954dfc5b09d9d712e69a9c4696186b871544edfa5ae73 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
52ccb4ac475ae943472f4dd6c00e095d
Commitment
Batch 52,371, Merkle root 05aa5e6717cec99cd91b3b7b32907fe0b10a0242e6b3ed412459ffdb5887d291. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. a5ab3138bce9b225110f30ae3c92ab0d81081064b327ff984f2bc4dbc5d6642d
  2. c76984966b118f40a51c6218f601f1b95b7e5b366106fa9d214f069340e6d30a
  3. 7d6da197c40daf8522267741d4261ac07203e17179d69c4212754af2998eeb6a
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.