16 releases
new 0.3.1 | Nov 20, 2024 |
---|---|
0.3.0 | Nov 20, 2024 |
0.2.6 | Nov 20, 2024 |
0.2.5 | Feb 28, 2024 |
0.1.3 | Apr 18, 2023 |
#3 in #outcome
30KB
686 lines
betting
A Rust crate to manage twitch-style bets (aka Parimutuel betting)
use bets::{Bets, BetError, Amount};
fn bet_demo() -> Result<(), BetError> {
// variables for readability
let server_id = 1;
let bet_id = 1;
let (alice, bob, charlie) = (0, 1, 2);
// Create the database
let bets = Bets::new("bets.db")?;
// Create 3 accounts on server 1 with 100 starting coins
bets.create_account(server_id, alice, 100)?;
bets.create_account(server_id, bob, 100)?;
bets.create_account(server_id, charlie, 100)?;
// Alice creates a bet with 2 outcomes
bets.create_bet(
bet_id, server_id, alice,
"Who will win the Rocket League 1v1 ?",
&vec!["Alice", "Bob"],
)?;
// Alice bets on herself (outcome with id 0) with 10 coins
bets.bet_on(bet_id, 0, alice, 10)?;
// Bob bets on himself (outcome with id 1) with 40 coins
bets.bet_on(bet_id, 1, bob, 40)?;
// Charlie bets on Alice with half of his coins (50)
bets.bet_on(bet_id, 0, charlie, 0.5)?;
// asserts that the money is gone from their accounts
assert_eq!(bets.balance(server_id, alice)?, 90);
assert_eq!(bets.balance(server_id, bob)?, 60);
assert_eq!(bets.balance(server_id, charlie)?, 50);
// lock the bet
bets.lock_bet(bet_id)?;
// ...
// Rocket league 1v1 occurs
// ...
// Alice ended up winning ! we resolve the bet with outcome of id 0
bets.resolve(bet_id, 0)?;
// The winning side gets 10 + 40 + 50 = 100 coins
// split proportionally among the betters
// Alice had bet 10 out of 60 of this outcome, she wins 100*(10/60) = 16.6 rounded to 17
assert_eq!(bets.balance(server_id, alice)?, 107);
// Bob doesn't win anything since he bet on the wrong outcome
assert_eq!(bets.balance(server_id, bob)?, 60);
// Charlie had bet 50 out of 60 of this outcome, he wins 100*(50/60) = 83.3 rounded to 83
assert_eq!(bets.balance(server_id, charlie)?, 133);
Ok(())
}
fn main() {
if let Err(why) = bet_demo() {
println!("{:?}", why);
}
}
Dependencies
~23MB
~451K SLoC