Verifying a roulette contract on a block explorer means confirming that the address the table sends your bets to holds published, readable source code that matches the bytecode on the chain, and then reading that source for the handful of functions that decide how bets are drawn, paid and controlled. The second part takes ten minutes and needs no programming beyond recognising a few names.
The seven steps below work on any of the major explorers, which all present verified contracts in the same way. This one check is what separates lists of the best crypto roulette sites built on-chain from lists that repeat what the sites say about themselves.
- Get the address from the table, not from the site’s text – Open the bet dialogue, connect a wallet, and read the contract address in the transaction preview before approving anything. Cancel the transaction. That address is the one to go to.
- Open the address on the explorer and look for the verified mark – Verified contracts show a green tick or the word “verified” on the contract tab, with a source code section below. An unverified contract shows only bytecode, and there is nothing further to read. Stop there.
- Check the compiler and the match type – The verification panel states the compiler version and whether the match is exact or partial. Exact means the published source compiles to the bytecode byte for byte. Partial means metadata differs, which is usually harmless.
- Find the draw function – Search the source for the words random, VRF, commit, reveal or blockhash. This tells you which of the three draw methods the table uses and where the number comes from. A VRF table shows a coordinator address and a callback function. A commit and reveal table shows hash storage and reveal functions. A blockhash-only table shows the word blockhash and nothing else, feeding the draw.
- Find the payout and edge – Search for the numbers 35, 36 and 37, or for the words payout, multiplier and edge. This locates the payout table and shows whether the edge comes from paying 35 to 1 on 37 pockets or from an explicit fee line.
- Find the owner functions – Search for onlyOwner, pause, withdraw and upgrade. These show what the operator can do. A pause function stops new bets. A withdrawal function moves the bankroll. An upgrade function, or a proxy pattern noted at the top of the contract page, means the code you are reading can be replaced.
- Read the recent transactions tab – Look for bets and payouts in the last few hours. A live table shows a steady stream of bet calls and internal payout transfers. A contract with no recent activity may be an old deployment.
Four signs should stop you before betting:
- No verified badge – The code cannot be read, so nothing below can be checked.
- Draw from blockhash alone – The pocket comes from a number that the block producer can shape.
- An owner withdraw function with no timelock – The operator can empty the bankroll in one transaction, which means a large win might not be paid.
- Proxy with no announced audit – The code can change under you, and no third party has reviewed the change process.
A contract that passes all seven steps is one you have read, at an address you know your bets go to, with a draw you can name.
