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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
150108♦Q♥ 18J♣A♥ 21 blackjack252.5945× the bet
149108♣9♣ 176♦4♣A♣ 21 doubled404× the bet
148108♦4♣ 12Q♠A♦ 21 blackjack252.5945× the bet
147106♥7♦J♥ 236♠K♥ 16202× the bet
146102♦10♣9♠ 21A♥4♠7♦9♣ 21101× the bet
145105♣3♥2♦3♠9♣ 224♥5♣7♦ 16 doubled4♣7♥2♦ 13 doubled4♣9♥ 1310010× the bet
144106♦9♠10♦ 257♦J♠ 17202× the bet
143103♦5♣J♣ 186♥8♠ 1400× the bet
14210A♥3♥8♦K♣ 22J♠Q♦ 20202× the bet
141106♥J♦A♦ 173♣8♣7♠ 18 doubled404× the bet
140103♣2♠3♦3♦7♠ 188♣6♠ 1400× the bet
139108♦5♦8♠ 21K♦6♠4♣ 2000× the bet
138102♦10♠5♣ 174♦3♥J♥ 17101× the bet
137106♥10♠8♠ 245♣K♦ 15202× the bet
136103♣K♦ 134♣2♣2♠4♦K♣ 22 bust00× the bet
13510K♦3♣6♣ 198♠5♠2♣5♣ 20202× the bet
13410J♦10♠ 204♣4♣Q♣ 1800× the bet
133105♥10♦A♠2♥ 188♠4♣ 1200× the bet
132107♣2♣6♣9♥ 24J♠Q♥ 20202× the bet
131106♠A♠ 178♥A♦ 19202× the bet
130106♣2♦6♣3♣ 178♦3♥Q♣ 21 doubled404× the bet
12910Q♦5♠7♥ 224♥7♥J♠ 21 doubled404× the bet
128104♥10♦Q♠ 247♦J♥ 17202× the bet
127103♣A♥7♦ 212♦Q♣9♥ 21101× the bet
126107♣K♠ 174♠K♦8♥ 22 bust00× the bet
12510J♥K♥ 20K♦6♦ 16 surrendered50.5× the bet
12410J♦K♦ 208♠5♠2♠6♥ 21202× the bet
123104♦K♠5♥ 199♥6♣ 159♣8♠ 1700× the bet
122108♦3♣ 114♥2♠2♣6♥J♣ 24 bust00× the bet
12110J♠4♦ 14K♣6♦ 16 surrendered50.5× the bet
12010Q♣3♠ 133♥10♠A♥2♣J♥ 26 bust00× the bet
119105♠J♣9♦ 243♥Q♠ 13202× the bet
118104♠10♠J♥ 246♣2♦5♣ 13202× the bet
117103♣2♣3♠3♣5♥10♥ 266♠4♣4♦ 14 doubled404× the bet
11610J♥9♦ 19J♣10♦ 20202× the bet
1151010♠J♦ 202♦10♠3♣4♦ 1900× the bet
114103♦6♣5♥10♠ 24A♣7♥7♦ 15 doubled404× the bet
11310Q♥Q♦ 2010♥J♣ 20101× the bet
112107♥J♠ 17A♦Q♦ 21 blackjack252.5945× the bet
111107♦3♦J♥ 204♦7♦Q♠ 21 doubled404× the bet
110102♣5♥3♥K♦ 205♠10♣ 1500× the bet
109103♥Q♠5♦ 185♦10♦ 1500× the bet
10810Q♣A♦ 219♦Q♣ 1900× the bet
10710Q♣8♣ 186♦4♠Q♦ 20202× the bet
106103♣8♥K♥ 218♣4♥4♥ 1600× the bet
105109♥J♦ 194♠K♦9♠ 23 bust00× the bet
104102♦3♦A♠9♣4♦ 19K♥5♠ 1500× the bet
10310Q♦5♠3♦ 18J♦2♣4♥A♦ 1700× the bet
102108♣5♥3♦10♦ 26J♣9♣ 19202× the bet
101106♣7♥J♥ 23J♠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.