v0 state

round

round is the current (open) round number, 1-based.

entrants

entrants holds the current round's players: key = address string, value = the address. Iteration is deterministic (sorted by key), which makes winner selection reproducible.

winners

winners records past rounds: key = zero-padded round number (for ordered iteration), value = \*winnerRecord.

winnerRecord

winnerKey

winnerKey zero-pads the round number so avl iteration yields chronological order for up to 10^9 rounds.

pickIndex

pickIndex derives the winning entrant index from the block height. Panics if there are no entrants. Pure helper (deterministic, no state) — safe to test.

Enter

Enter adds the caller to the current round's entrants. Each address may only enter a given round once; a duplicate entry panics.

DrawWinner

CurrentRound

CurrentRound returns the currently open round number.

NumEntrants

NumEntrants returns how many players have entered the current round.

HasEntered

HasEntered reports whether addr is in the current round.

Render

Render shows the current round, its entrants, and the winners history.