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

Blackjack

Play moneyended

acafeedb8798c706d8d59159756d0a65

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,400 play
Returned
2,315 play
Bettor's net
-85 play
Return
96.46%

Results by hand

Final
Hands
200
played
Pace
17.5/min
overall 19.3/min
Biggest swing
-30
Seat 1 · hand 114

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

SeatNetRateStreak
gbb-85-42.5 play/100won 1

Last hands

  1. 200Even0
  2. 199Seat 1+20
  3. 198Even0
  4. 197Seat 1+20
  5. 196Even0
  6. 195Even0
  7. 194Seat 1+30
  8. 193Seat 1+10
  9. 192Seat 1+10
  10. 191Even0
  11. 190Even0
  12. 189Even0

The hands

Newest first
#BetDealerHandsPaidChecked
150105♦K♠4♦ 19K♣6♣ 1600× the bet
149104♠2♦6♠2♣J♥ 24A♦2♥8♦ 21202× the bet
148103♣A♣5♣ 194♠9♥ 1300× the bet
14710Q♥8♥ 183♥3♥6♣5♠ 1700× the bet
14610A♣5♦7♥3♥A♣ 17Q♠2♣4♠5♣ 21202× the bet
145103♦5♠8♣5♣ 216♣2♥5♠ 1300× the bet
14410Q♣K♠ 204♣9♠5♠ 1800× the bet
143107♣6♦J♥ 23Q♦2♣5♦ 17202× the bet
14210A♥J♣ 21K♠3♣ 1300× the bet
141109♥J♥ 194♥A♣Q♠4♥ 19101× the bet
14010K♦J♥ 20K♦Q♥ 20101× the bet
13910A♥10♦ 217♥Q♠ 1700× the bet
138103♣9♣2♣7♠ 217♠3♥Q♣ 20 doubled00× the bet
137109♦J♠ 193♥2♣7♣K♠ 22 bust00× the bet
136107♥J♣ 177♣J♣ 17101× the bet
135104♠2♥Q♥J♦ 266♣5♠A♦ 12 doubled404× the bet
134102♠K♣ 12Q♠A♦ 21 blackjack252.5945× the bet
133103♠6♦10♦ 19A♥8♣ 19101× the bet
13210J♦6♥A♥ 179♣2♠Q♥ 21 doubled404× the bet
13110Q♠J♥ 202♥4♦K♠7♣ 23 bust00× the bet
13010K♠Q♣ 20K♥K♠ 20101× the bet
129106♣6♦2♠A♠K♦ 257♣6♥ 13202× the bet
12810J♠3♠ 1310♦5♦ 15 surrendered50.5× the bet
127109♥5♥6♥ 204♥3♥J♠ 1700× the bet
126105♠Q♥6♥ 214♠K♥ 1400× the bet
125106♠8♠8♥ 227♦8♣ 15202× the bet
12410K♠3♥ 137♥7♥A♣8♠ 23 bust00× the bet
12310Q♣8♦ 18Q♣2♣5♣ 1700× the bet
122108♠A♠ 195♠Q♥7♣ 22 bust00× the bet
12110A♦6♣ 17A♥Q♠ 21 blackjack252.5945× the bet
120108♥7♠ 156♦9♠Q♥ 25 bust00× the bet
11910K♥7♦ 17K♣10♦ 20202× the bet
1181010♠3♦J♣ 238♠J♠ 18202× the bet
11710K♣K♥ 207♦4♦3♦ 14 doubled00× the bet
116103♣9♥10♦ 223♣2♥8♠ 13202× the bet
115102♣K♣2♦7♠ 218♦2♣4♠ 14 doubled00× the bet
114104♣9♦3♠4♠ 208♣3♦6♦ 17 doubled8♣J♠ 1800× the bet
113109♥9♠ 183♣7♠5♣ 15 doubled00× the bet
11210J♥4♥J♦ 24K♦Q♦ 20202× the bet
11110J♠J♥ 20A♦Q♦ 21 blackjack252.5945× the bet
110108♠3♥Q♣ 212♣8♥Q♦ 20 doubled00× the bet
109106♦6♣K♦ 225♦6♠3♠ 14 doubled404× the bet
108104♦A♠7♣4♥A♦ 179♣2♥6♥ 17 doubled202× the bet
107106♥5♠4♥K♥ 255♦A♥9♠ 15 doubled404× the bet
10610Q♣6♠Q♠ 263♦A♥7♦ 21202× the bet
105109♦J♠ 194♣9♦4♥ 1700× the bet
104102♣3♣A♦K♦2♥ 188♠3♣5♣ 16 doubled00× the bet
10310A♦5♠ 163♣J♥9♦ 22 bust00× the bet
102108♥7♣K♦ 254♦5♦K♠ 19202× the bet
10110J♣K♣ 20J♠J♥ 20101× 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
2cd675720e588db6e374829ee2c842d68ac4267c2eceac9fe848559d1098d310
Seed
1a4c1ef3b9fe4e2bdca51330f80c7685411667b7e3d23c1ae86a3676e88602fc SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
930e12da543601406dfad4d5de92b112
Commitment
Batch 48,334, Merkle root b2a1070f88b9f8ce4fb34db1241c7ecc961f2b8f44cf11416b017a2e54eb453b. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 1830f14d79c0c9e8c086065c31356b732207583e13eac9c3b3e6936120cf5552
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.