Fifteen tiles: seven red, seven black and one green. One roll a round, and everybody at the table bets into the same one.
Red and black pay double. Green pays fourteen times. You can back more than one colour in a round, and each stake settles on its own.
That single green tile is the entire house edge. Nothing is shaved off a winning payout afterwards, which is why the numbers on the board are the numbers you actually get.
The seed hash is committed before betting opens and the seed is revealed once the wheel stops, so the tile was picked before the first stake of the round was placed.
What does Roulette pay?
Red and black pay double, green pays fourteen times. The wheel has fifteen tiles, seven red, seven black and one green, and that single green tile is the entire house edge; nothing is shaved off a winning payout.
Can I bet while the Roulette wheel is spinning?
Yes. A bet placed during a spin is queued for the next round and the key says so, so you never have to race the betting window.
Can I back more than one colour in a Roulette round?
Yes. Each stake settles on its own against the same roll, and you can place one bet per colour in a round.