S☉Lucky is a set of three lottery games on Solana, made by Nexow, Inc.: a daily lottery, an hourly lottery and Guess the number. Every ticket, pot and draw is an account of an open-source Solana program, so anyone can check it. The winner takes 80% of the pot; the house fee comes out of the rest, and what is left carries over to the game’s next round.

The public app runs on Solana devnet, where SOL is free test money from faucet.solana.com. The program works the same on mainnet, but running a real-money lottery needs the right licences where you operate.

How much does a ticket cost?

Each game’s price is set on-chain and shown on its Play page. Besides the price, a ticket account holds a small rent deposit that you get back by closing the ticket once the round is paid. The first ticket of a round also pays the rent of the round’s account, which stays on-chain as its public record; in the lotteries, each ticket also pays for the 4 bytes its number takes there.

How are my odds calculated?

In the lotteries, the ticket closest to the drawn number wins, so your chance is the share of the number range that lies closer to your numbers than to anyone else’s: a number far from the other tickets covers more of it. In Guess the number, each check finds the number with odds of the new guesses over the numbers not tried yet.

What if nobody draws the round?

A small bot (the crank) closes, draws and pays every lottery round within seconds of its end, and checks new guesses every few seconds. Anyone can do the same from the Play page. If the pinned slot ever becomes too old to read (about three minutes), the round can be closed again to pin a fresh one; the program only allows that once the old slot is provably out of reach.

Why do you show my country?

S☉Lucky has always shown a flag next to each ticket. We suggest your country from your host connection, without any third-party lookup, and you can change it or keep it private before buying. It is stored on-chain with your ticket.

Can a validator cheat the draw?

Players cannot: the winning hash does not exist when sales close. The validator that produces the pinned slot could bias it, by choosing what goes in that block or by skipping it. That is acceptable for a test-money game; for real-money pots, the draw should use a verifiable randomness oracle, and the README explains where to plug one in.

Daily lottery · one draw a day

Pick a number.
Win at midnight.

One round a day, from 00:00 to 24:00 UTC. Pick any number from 0 to 21 000 000: right after midnight a number is drawn at random, and the ticket closest to it wins 80% of the pot. The house fee comes out of the rest, and what is left carries over to the next day.

Play now How it works

How it works

Four steps, one draw a day

Rounds follow the UTC calendar: a new one opens at 00:00 UTC and is drawn right after the next midnight.

01
Connect a wallet
Solflare, Phantom, Backpack or any wallet that speaks the Wallet Standard. No account, no email.
Any time
02
Pick your number
Any number from 0 to 21 000 000. Each number can be held by one ticket per day, so be quick.
Until midnight UTC
03
Watch the pot grow
Every ticket adds its price to the pot, held by the round’s own account on Solana. Nobody else can move it.
All day
04
Win at midnight UTC
A random number is drawn, and the ticket closest to it wins 80% of the pot. The house fee comes out of the rest, and what is left carries over to the next day.
Right after midnight UTC

80% of every pot goes to the winner

The program pays it to the winning ticket’s owner when the round is settled. The house fee comes out of the other 20%, and what is left carries over to the game’s next round.

WinnerHouse fee · Next round

Winners

Every winner, on-chain

The latest settled rounds of this game, read from the program’s accounts. Each one links to its round page, where the result can be recomputed.

Fairness

Don’t trust us. Check.

S☉Lucky is a Solana program, not a server holding your money. These rules are enforced by its code.

The pot is locked in the program
Ticket money goes straight to the round’s account. The program only ever pays 80% of it to the winning ticket’s owner, the fee to the treasury, and the rest to the game’s next round. The operator cannot withdraw it.
A draw nobody can predict
Every purchase is mixed into the round’s entropy. When a round ends, it pins a slot a few seconds in the future; that slot’s hash, unknown to everyone until then, picks the number the tickets are measured against.
Anyone can run it
Closing, drawing and paying out are open to everyone. If the operator vanished tomorrow, any player could still finish every round.
Checkable in your browser
Each round page recomputes the draw from public data: the entropy, the slot hash, the drawn number and the closest ticket. Same inputs, same winner.
Hard limits on the house
The program always pays the winner 80% of the pot and caps the fee at 20%. Price and fee changes only apply to rounds opened afterwards, and a buyer never pays more than the price they were shown.
Open source
The program, the app and the operator scripts are public, with tests for every rule.

FAQ

Questions

Still unsure? The program, the app and the operator scripts are open source.

Read the code

Games

Two more ways to play

Same numbers, from 0 to 21 000 000. The winner takes 80% of the pot; the house fee comes out of the rest, and what is left carries over to the next round.

Hourly lottery

A draw every hour, on the hour (UTC). The ticket closest to the drawn number wins.

Discover

Guess the number

No deadline. New guesses are checked every few seconds until one finds the round’s number; then a new round starts.

Discover

Drawn every day after midnight UTC

Today’s pot is waiting

Pick a number nobody has taken yet. Good luck!

Play now

Pick a number.Win at midnight.

Connect a wallet

Pick your number

Watch the pot grow

Win at midnight UTC

80% of every pot goes to the winner

The pot is locked in the program

A draw nobody can predict

Anyone can run it

Checkable in your browser

Hard limits on the house

Open source

Hourly lottery

Guess the number

Today’s pot is waiting

Pick a number.
Win at midnight.