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

Blackjack

Play moneyended

a8db3a8115dd5e76f5096acbe37a8813

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,260 play
Returned
2,065 play
Bettor's net
-195 play
Return
91.37%

Results by hand

Final
Hands
200
played
Pace
18.2/min
overall 18.6/min
Biggest swing
+20
Seat 1 · hand 1

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

SeatNetRateStreak
gbb-195-97.5 play/100won 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
150108♥2♦6♣A♠ 172♥7♥K♦ 19202× the bet
149104♠4♣9♦ 17Q♥9♦ 19202× the bet
148103♠10♠ 1310♦2♠K♣ 22 bust00× the bet
14710A♥4♣ 154♥Q♦9♦ 23 bust00× the bet
146107♣8♠7♥ 223♠Q♥7♣ 20202× the bet
145107♣4♣7♣ 18J♦J♥ 20202× the bet
144104♠10♦J♠ 244♦K♠ 14202× the bet
14310J♠K♥ 209♦A♠ 20101× the bet
14210A♠9♣ 204♠2♣10♦5♦ 21202× the bet
141105♥5♦5♣6♣ 2110♦J♠ 2000× the bet
1401010♠K♦ 209♠A♠ 20101× the bet
139106♣2♣10♦ 185♣K♠ 1500× the bet
1381010♠K♠ 2010♣10♠ 20101× the bet
137109♠3♣J♦ 227♣J♦ 17202× the bet
136103♥6♥3♥7♠ 197♥Q♣ 1700× the bet
13510Q♥7♦ 173♥J♦7♣ 20202× the bet
13410A♥A♣ 12J♦6♥ 16 surrendered50.5× the bet
1331010♥6♣ 16K♣6♠ 16 surrendered50.5× the bet
132105♣Q♥2♥ 179♥7♦ 1600× the bet
131107♣10♠ 176♥9♣J♦ 25 bust00× the bet
130102♣6♥8♣5♣ 215♣4♠2♥Q♣ 21101× the bet
129102♠K♠5♠ 17Q♦7♦ 17101× the bet
12810K♣K♥ 204♥7♣10♠ 21 doubled404× the bet
127108♥7♣5♣ 2010♠J♣ 20101× the bet
1261010♣J♥ 204♠K♦2♠2♦ 1800× the bet
125108♥6♣8♥ 228♦K♠ 18202× the bet
124104♣2♣6♦A♠K♠ 237♠3♦3♣ 13 doubled404× the bet
123103♣6♣6♠3♣ 1810♦6♣ 1600× the bet
122103♦J♦3♦5♣ 215♥5♠8♠ 18 doubled00× the bet
12110K♠Q♦ 20J♣5♦ 15 surrendered50.5× the bet
12010J♥7♥ 17A♦K♥ 21 blackjack252.5945× the bet
119106♣9♠9♣ 248♦6♣ 14202× the bet
118108♣9♦ 17A♥6♦ 17A♣7♣ 18303× the bet
11710K♣J♣ 20K♦2♦10♦ 22 bust00× the bet
116102♥5♦2♠3♠K♣ 2210♣9♦ 19202× the bet
115108♠9♠ 17Q♠4♦K♠ 24 bust00× the bet
114102♠Q♠4♣9♣ 25J♣7♣ 17202× the bet
11310Q♣8♦ 184♥5♥3♦A♦3♣9♦ 25 bust00× the bet
112104♣4♣A♦ 19K♦8♣ 1800× the bet
11110K♣10♠ 20K♠4♠K♦ 24 bust00× the bet
11010J♦7♣ 176♥6♦Q♦ 22 bust00× the bet
10910A♣10♥ 21A♠4♠ 1500× the bet
10810J♥Q♦ 207♥4♦K♠ 21 doubled404× the bet
107107♥10♦ 179♦4♣9♠ 22 bust00× the bet
106109♠3♠ 126♥6♠10♥ 22 bust00× the bet
1051010♣7♠ 17A♠5♥7♠2♠7♦ 22 bust00× the bet
10410Q♠3♦K♦ 236♠5♦9♣ 20 doubled404× the bet
10310J♠8♣ 18A♣2♦3♣A♠7♠9♦ 23 bust00× the bet
102108♦Q♠ 18J♥4♣A♦K♠ 25 bust00× the bet
10110Q♦J♣ 20A♦K♣ 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
cd180887653312b58060972529fd3964965dfb93e101e65308899be634571f08
Seed
6cffcb1703498b551bed6aef3a733353ff51bce3ef225abf4d05a44fce8e81c7 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
b15f714d4a284f282335ce95eb85c4b9
Commitment
Batch 47,631, Merkle root 8194f3983422c691f7fd83c8d5860e70c1c597d3e4077440dabae6baafca5f56. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. ae5b361b1f97299fa4cc35628061e0557ce5d4ecc43280a91948fab1002270be
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.