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

Blackjack

Play moneyended

9f5cc6b03970173414ec75da3da49676

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,240 play
Returned
2,140 play
Bettor's net
-100 play
Return
95.54%

Results by hand

Final
Hands
200
played
Pace
19.6/min
overall 20.1/min
Biggest swing
+40
Seat 1 · hand 67

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

SeatNetRateStreak
gbb-100-50.0 play/100lost 3

Last hands

  1. 200Even0
  2. 199Even0
  3. 198Even0
  4. 197Seat 1+10
  5. 196Seat 1+10
  6. 195Even0
  7. 194Even0
  8. 193Even0
  9. 192Seat 1+10
  10. 191Seat 1+15
  11. 190Seat 1+20
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
20010J♠K♥ 20J♣7♥ 1700× the bet
199109♠K♦ 197♠10♥ 1700× the bet
1981010♦3♥ 135♠10♦ 15 surrendered50.5× the bet
197103♣3♠9♦3♥ 183♠5♥2♠Q♥ 20202× the bet
196102♠5♥9♣10♦ 267♥2♥Q♦ 19202× the bet
195109♥10♣ 19J♠8♦ 1800× the bet
19410Q♦7♦ 17Q♥6♠ 16 surrendered50.5× the bet
193108♠K♥ 182♠9♥A♥ 12 doubled00× the bet
19210K♣4♣3♦ 17A♥8♥ 19202× the bet
191109♣3♣ 12A♥10♥ 21 blackjack252.5945× the bet
190104♣3♠A♦ 187♠4♠Q♣ 21 doubled404× the bet
18910A♠Q♣ 21A♥7♣ 1800× the bet
18810A♠9♠ 203♣J♣6♦ 1900× the bet
1871010♦8♥ 189♥J♦ 19202× the bet
1861010♥5♦ 154♥K♦2♠K♣ 26 bust00× the bet
18510K♠4♠5♣ 197♥5♦4♥2♣ 1800× the bet
18410K♥A♠ 214♠Q♥ 1400× the bet
183107♥10♦ 177♦Q♣ 17101× the bet
182107♥K♥ 174♥6♣3♠ 13 doubled00× the bet
18110A♣9♥ 203♠5♣2♥10♦ 20101× the bet
180108♠6♥ 14J♦3♠3♣J♥ 26 bust00× the bet
179103♥10♠3♦K♦ 263♠10♠ 13202× the bet
17810K♥3♥ 138♥2♦5♠10♠ 25 bust00× the bet
1771010♠Q♣ 20Q♦8♣ 1800× the bet
17610Q♣Q♣ 20K♥K♠ 20101× the bet
175102♦J♦2♣8♦ 22Q♣6♦ 16202× the bet
1741010♠7♥ 17Q♦Q♣ 20202× the bet
17310K♣6♥ 164♣2♥3♥7♠J♥ 26 bust00× the bet
1721010♣2♦Q♦ 227♥A♠K♠ 18202× the bet
171108♦A♦ 19Q♥J♣ 20202× the bet
170109♦9♥ 186♣3♥4♦A♠2♥9♠ 25 bust00× the bet
169109♠2♥9♠ 20A♠8♣ 1900× the bet
168109♥8♥ 173♠8♣3♣ 14 doubled00× the bet
167104♣5♥3♦3♠7♠ 223♣4♠7♦ 14202× the bet
166102♦Q♣5♦ 175♣A♣J♠ 1600× the bet
16510K♥8♠ 18J♥5♦ 15 surrendered50.5× the bet
164107♣K♦ 176♦Q♦J♥ 26 bust00× the bet
1631010♥Q♣ 202♦4♦10♠3♣ 1900× the bet
16210K♠K♣ 203♣K♥4♦ 1700× the bet
161102♠8♦6♥4♦ 20Q♠9♠ 1900× the bet
16010A♦A♠2♠J♠8♣ 227♣A♥10♥ 18202× the bet
159106♠K♦ 16A♠K♣ 21 blackjack252.5945× the bet
158107♣Q♣ 178♦3♥4♣ 15 doubled00× the bet
1571010♣4♣7♦ 21K♣3♠6♥ 1900× the bet
15610J♦A♥ 21Q♦Q♠ 2000× the bet
15510J♣3♠ 13A♦Q♣ 21 blackjack252.5945× the bet
154109♣3♠2♣5♦ 198♣Q♦ 1800× the bet
153104♣5♠2♣3♠3♣ 174♥K♣ 1400× the bet
152109♥K♥ 19K♣8♦ 1800× the bet
151105♥Q♠Q♠ 259♠3♣ 12202× 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
ac0fa33e7caedd68098ec80d0d0f95c675fe33add4dbaa7c11dc81d612a672c2
Seed
6296732d262d6fcd906e03a07b95ac3331fb2f4607d8f525fe07d33fb9ef73c6 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
906bfa5810132d6fa00c58a6b604ed55
Commitment
Batch 58,084, Merkle root 71982ac37343e5f09e231e31c6bc981491cc7eb23cbe493d3b1f3f6915af65dd. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. d9800d2cc2e2961099f2f83a424bafa9fcc1a5e34fbe380515be5b770a8af2e1
  2. 542ec0511f52170547a2e2aeefd2c418394570feca8ed6b5a9fc88867e7def74
  3. a09ef676fd8aae66722f45cf55cdda217bc3010ec94cd1441d747f12c3beafb8
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.