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

Blackjack

Play moneyended

26efdb72281020ad3bcdfbb675cd6b2b

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,240 play
Returned
2,155 play
Bettor's net
-85 play
Return
96.21%

Results by hand

Final
Hands
200
played
Pace
19.0/min
overall 20.4/min
Biggest swing
+50
Seat 1 · hand 2

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

SeatNetRateStreak
gbb-85-42.5 play/100won 2

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
200104♥J♠9♥ 23J♥10♣ 20202× the bet
199105♥9♦4♥ 183♦8♠10♣ 21 doubled404× the bet
198107♣4♠2♣6♥ 194♥4♣3♥2♣3♦3♦ 19101× the bet
19710Q♦7♠ 17K♣3♥3♥8♦ 24 bust00× the bet
19610Q♣A♠ 216♣6♥ 1200× the bet
19510J♣Q♥ 206♣3♦8♣ 1700× the bet
194108♠4♣3♠2♣ 17J♥K♥ 20202× the bet
1931010♦8♦ 183♦5♠9♥ 1700× the bet
192102♥9♦9♥ 207♣8♣ 1500× the bet
191107♠8♥ 156♦J♣10♦ 26 bust00× the bet
190108♠5♥ 137♣7♦9♥ 23 bust00× the bet
18910A♣J♥ 21A♦A♦ 1200× the bet
18810K♦4♥Q♠ 246♥6♦8♠ 20202× the bet
187109♥2♥8♦ 193♥8♣A♠ 12 doubled00× the bet
18610A♦A♦ 125♦6♠2♣K♦ 23 bust00× the bet
185102♠K♥7♠ 193♦4♦8♠ 1500× the bet
1841010♦7♦ 17Q♦2♣6♦ 18202× the bet
183106♥7♠7♦ 205♣6♥8♦ 19 doubled00× the bet
18210K♣9♣ 1910♠9♠ 19101× the bet
18110J♠2♥ 1210♠A♣ 21 blackjack252.5945× the bet
180108♠3♦A♠9♦ 21A♦6♠9♠2♠ 1800× the bet
179102♥6♣A♠ 19A♥9♣ 20202× the bet
178105♠5♠6♦7♠ 2310♠7♥ 17202× the bet
17710A♣7♦ 18A♥K♥ 21 blackjack252.5945× the bet
176106♠2♦3♦10♥ 214♥5♥Q♦ 19 doubled00× the bet
17510Q♠6♦Q♥ 264♠2♣7♦5♠ 18202× the bet
17410K♦2♥5♣ 174♠7♦K♦ 21 doubled404× the bet
17310J♦K♥ 204♦3♦5♣2♦9♣ 23 bust00× the bet
17210Q♥6♣ 167♦5♣10♥ 22 bust00× the bet
171103♥K♣5♣ 1810♠6♦ 1600× the bet
17010A♥6♦ 175♣7♦2♠3♠ 17101× the bet
16910A♣J♦ 21J♥5♥ 1500× the bet
16810A♠2♠ 138♠4♥10♣ 22 bust00× the bet
16710K♣5♠ 1510♦6♥ 16 surrendered50.5× the bet
166102♦Q♣5♥ 17K♦8♣ 18202× the bet
165108♥8♦ 166♥A♠7♦2♦10♠ 26 bust00× the bet
164108♦K♣ 183♣3♦2♥9♠ 1700× the bet
1631010♠Q♠ 20J♣J♣ 20101× the bet
162102♣10♣6♦ 186♦9♠ 156♠5♦J♥ 21 doubled404× the bet
1611010♣4♥2♦5♠ 217♣K♣ 1700× the bet
16010Q♠8♦ 18Q♣8♥ 18101× the bet
159106♣3♠9♠ 188♥7♠ 1500× the bet
158108♣3♠9♣ 209♦4♥J♥ 23 bust9♣3♠K♠ 22 bust9♥10♥ 1900× the bet
157105♥8♥ 13A♣K♠ 21 blackjack252.5945× the bet
156103♠Q♥ 13A♣5♣6♣J♣ 22 bust00× the bet
15510Q♥6♦5♥ 2110♠8♥ 1800× the bet
15410Q♠A♥ 216♦Q♥ 1600× the bet
15310J♣Q♠ 20J♦Q♣ 20101× the bet
15210K♦A♥ 2110♥6♠ 1600× the bet
151107♦9♠ 167♦6♠3♥Q♠ 26 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
aed6cf02f623d97833e461300a307dacfbe6ae6cd3d038b4c03cebc8cd097887
Seed
56f7392bb527b91cd2af73983319c0864cf3482c23bfd3a746760e561604334f SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
85d0204c3436f448ed904ea5da0dff0b
Commitment
Batch 59,104, Merkle root 80430b0fff4d74c025959ff4ca28be14b0ee16eaaadc5e91a8e85bb694717303. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 5670244b1505e5b27bb7244bfab337ea2e9322a733338f2ac2afb33fc41b8ffa
  2. 34c492ad4685953161d1f789874f0e1123303069627281cf49cfa08bed0255a1
  3. 8c5203d0fa36aef6f9bc481e916bdd7b48b4acc4120e297ed4d5a101d422630a
  4. 635034bf0ff271729e13b8badd53cf3d5344a826ed6dbb908d97312afb8bb2c3
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.