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

Blackjack

Play moneyended

c8662cd6245eab53bf85fcc64d2f1121

Watch the replayThe handsThe rulesCheck it is fair

gbbagainst the house
Hands played
200
Wagered
2,320 play
Returned
2,420 play
Bettor's net
+100 play
Return
104.31%

Results by hand

Final
Hands
200
played
Pace
19.2/min
overall 19.7/min
Biggest swing
+30
Seat 1 · hand 75

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

SeatNetRateStreak
gbb+100+50.0 play/100won 1

Last hands

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

The hands

Newest first
#BetDealerHandsPaidChecked
100104♣7♥9♥ 202♣6♠K♠ 1800× the bet
9910Q♥J♣ 20A♣6♣J♣ 1700× the bet
9810A♠A♣2♦10♥Q♣ 243♣3♣A♣A♣A♠ 19202× the bet
9710A♣K♠ 218♣4♣ 1200× the bet
96105♣Q♠K♠ 257♣4♥6♠ 17 doubled7♣K♣ 17606× the bet
95109♠K♣ 193♥Q♠10♠ 23 bust00× the bet
9410Q♣Q♣ 207♣K♦ 1700× the bet
9310K♣7♠ 178♣3♣8♣ 19 doubled404× the bet
92105♠3♦8♣2♦ 184♠5♥7♠ 16 doubled00× the bet
91103♥3♦9♠2♠ 172♥8♥K♣ 20 doubled404× the bet
90108♥4♠5♠ 176♣7♠2♥3♠ 18202× the bet
891010♥6♣ 162♦3♦8♥J♠ 23 bust00× the bet
8810Q♦8♠ 185♥8♦5♠ 18101× the bet
8710Q♥K♠ 205♣10♠ 15 surrendered50.5× the bet
8610J♠7♠ 1710♦K♣ 20202× the bet
85108♠2♦ 102♣Q♣A♣10♣ 23 bust00× the bet
84107♣3♦ 10K♥A♣ 21 blackjack252.5945× the bet
83107♥6♠A♥6♣ 2010♦5♦4♠ 1900× the bet
82102♥2♥J♣7♣ 21Q♠8♥ 1800× the bet
81104♦J♠Q♦ 24Q♦3♦ 13202× the bet
8010Q♠8♣ 185♥4♥7♠A♣ 1700× the bet
79106♦9♠9♣ 24Q♦6♦ 16202× the bet
78103♣4♦Q♠ 179♥3♠4♦ 1600× the bet
77108♦K♠ 18Q♦A♦ 21 blackjack252.5945× the bet
76102♣5♣5♠A♦J♥ 237♥10♠ 17202× the bet
75106♥6♠10♦ 224♣9♣ 134♠6♦A♦ 21 doubled606× the bet
74102♦K♥A♠5♣ 189♠K♣ 19202× the bet
7310J♦Q♦ 20A♠3♠K♣10♦ 24 bust00× the bet
72109♥Q♠ 197♠7♠8♣ 22 bust00× the bet
71108♥K♥ 186♣7♣A♦4♦ 18101× the bet
70103♥6♣5♠Q♠ 244♦A♠7♣5♥ 17202× the bet
691010♥4♦5♠ 19J♥J♥ 20202× the bet
6810K♦5♦ 153♣K♦K♦ 23 bust00× the bet
67107♦8♠A♥A♦ 172♠K♦6♣ 18202× the bet
6610K♥7♥ 177♣4♣7♦ 18 doubled404× the bet
6510Q♣4♦3♥ 17J♥8♥ 18202× the bet
64104♦6♣2♦10♣ 229♦A♦ 20202× the bet
631010♠A♣ 212♥7♥ 900× the bet
6210J♥J♥ 205♥6♣Q♠ 21 doubled404× the bet
6110K♣5♣ 157♦A♠5♠9♣ 22 bust00× the bet
6010J♣K♠ 20K♥8♥ 1800× the bet
59105♣A♠2♣ 187♥3♥4♣ 14 doubled00× the bet
58104♠8♦4♥7♥ 237♠5♠ 12202× the bet
57108♥10♠ 18Q♦10♥ 20202× the bet
56105♠8♥6♦ 196♠A♥10♥ 17 doubled00× the bet
55107♥A♦ 18Q♥J♦ 20202× the bet
54104♠3♦5♠8♣ 20K♥4♣ 1400× the bet
53103♦5♠Q♦ 185♣9♦ 1400× the bet
5210J♥K♦ 208♠7♥6♠ 218♠J♦ 18202× the bet
5110J♠A♥ 213♣3♠ 600× 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
9c07c8497f8295c2fa3c61d49ec2618054dfc66e70bee5a17487975c56f0108d
Seed
2f829af108043f5893290fc9e2673121221e3af165809ef53398d66c4514c179 SHA-256 of "degen.match.seed.v1", a zero byte and the 32 seed bytes is the seed hash.
Bettor's seed
9c3bf56989a16ea065222944c96ea875
Commitment
Batch 57,513, Merkle root 9b20b6e6e625c25fab296ed8f31c58c4077c26adbea1638265b7b407442d8650. Recorded by Degen Protocol, not on a chain. See this batch and its Merkle tree
Merkle path
  1. 4c50821087e167309f8970784d0e6ddf05620952a9d9d70f38402d7b03275893
  2. ee50dec5e53528ace3c83e06f5822e8d1cbb114fd631d4c122c3393e9824753f
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.