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

Blackjack

Play moneyended

100ab9de0a7caeaa6c14e509ce183352

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,200 play
Returned
2,220 play
Bettor's net
+20 play
Return
100.91%

Results by hand

Final
Hands
200
played
Pace
20.8/min
overall 20.8/min
Biggest swing
+40
Seat 1 · hand 104

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

SeatNetRateStreak
gbb+20+10.0 play/100won 4

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
150104♦8♠K♠ 222♥3♥10♦ 15202× the bet
149106♦8♣K♣ 247♦2♣J♦ 19 doubled404× the bet
148107♣4♣9♣ 20Q♠Q♠ 20101× the bet
147108♥5♥ 135♣K♣8♣ 23 bust00× the bet
146103♣9♣A♦Q♦ 238♦J♠ 18202× the bet
145106♠8♠5♦ 19Q♥J♣ 20202× the bet
14410A♣2♦6♠ 197♦4♥6♣ 1700× the bet
1431010♦5♠ 155♠9♥10♠ 24 bust00× the bet
142102♣9♠Q♣ 21J♠J♣ 2000× the bet
141106♣4♥8♣ 188♠J♠ 18101× the bet
140106♠A♦ 17A♥4♦6♣ 21 doubled404× the bet
1391010♣Q♥ 20A♦K♣ 21A♠7♥ 18202× the bet
13810A♠Q♥ 21A♣2♦ 1300× the bet
13710A♣8♣ 19J♥8♦ 1800× the bet
136106♦6♦2♥8♦ 22Q♥8♠ 18202× the bet
13510Q♥J♣ 209♦6♥ 15 surrendered50.5× the bet
134106♦2♦3♥2♥K♣ 234♠J♣ 14202× the bet
133103♥10♣K♥ 23J♣K♠ 20202× the bet
13210K♣A♦ 216♥3♦ 900× the bet
131106♠2♣J♥ 186♠7♦ 1300× the bet
130108♠A♦ 1910♥7♦ 1700× the bet
129106♥3♥4♥7♦ 208♠9♣ 1700× the bet
128108♣10♦ 18J♦9♥ 19202× the bet
127108♠9♣ 175♥8♠Q♦ 23 bust00× the bet
1261010♠K♥ 206♦A♦Q♣ 1700× the bet
125108♠K♦ 188♠J♣ 18101× the bet
12410K♥A♦ 218♦J♦ 1800× the bet
12310A♥10♦ 21K♦6♣ 1600× the bet
12210K♠A♣ 218♦Q♦ 1800× the bet
121102♦Q♣K♠ 225♣Q♦ 15202× the bet
12010A♥6♠ 175♦5♠10♥ 20202× the bet
119104♥2♣K♦7♣ 23A♣Q♥ 21A♠J♠ 21404× the bet
118105♠8♠K♥ 2310♣10♦ 20202× the bet
117109♥K♦ 194♥K♣2♥9♠ 25 bust00× the bet
11610A♣A♥5♦ 1710♣K♦ 20202× the bet
11510J♠8♥ 18Q♥3♠5♣ 18101× the bet
11410J♠6♠7♥ 233♦K♥5♣ 18202× the bet
113104♣A♣A♥Q♠A♣ 178♣4♠ 1200× the bet
112105♠9♣2♣A♥ 176♠9♠ 1500× the bet
11110K♥4♦10♠ 249♦9♥ 18202× the bet
110104♣2♣7♠2♠J♦ 256♠2♣9♠ 17202× the bet
10910J♣J♣ 202♠J♠8♠ 20101× the bet
1081010♥9♦ 193♣3♣9♦10♥ 25 bust00× the bet
107104♠8♥3♠Q♥ 25Q♠9♥ 19202× the bet
106108♠7♠J♦ 25Q♣J♣ 20202× the bet
105109♦8♠ 177♣Q♠ 17101× the bet
104102♠10♠A♦3♥Q♣ 263♦J♠ 133♣Q♥ 133♣7♥7♦ 17 doubled808× the bet
103109♦Q♣ 199♣6♦Q♠ 25 bust00× the bet
102107♥6♠ 135♦8♣2♣10♣ 25 bust00× the bet
10110K♠5♦ 15J♦A♥ 21 blackjack252.5945× 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
83629826d0a58ef0526ce2dc617232f258338616dbec569c47a3bc6d02ba50d7
Seed
ffb983246bb266ec2c442982c3113b7885ec25d5a492c655c4951b5b1be0e535 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
f0fd1848f6ad02b35a3daddfd2a54693
Commitment
Batch 57,112, Merkle root 9e2024c9c7007335e72657d552e51dd4a74138ea0504fb7d2131511424615589. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 580bf3ecc6c45d75861470cd3a74bb6f0e047483d7093156a513ede6528c36c6
  2. 7a935acaf47654c7c93d967ad82bd746a22f94019198a1523280de1b57ad9a21
  3. 1b2481853d797b3892b29f457a66470094d2638696a7235ec58231e8b1c19924
  4. 8983cae76641697481d2f6a07ff1c381e625ee8d18da86036d20dcb26e6a05b3
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.