betting

A Rust crate to manage twitch-style bets (aka Parimutuel betting)

```rust use bets::{Bets, BetError, Amount};

fn betdemo() -> Result<(), BetError> { let bets = Bets::new("bets.db").unwrap(); // Create 3 accounts on server 1 with 100 starting coins bets.createaccount(1u64, 0u64, 100u64).unwrap(); bets.createaccount(1u64, 1u64, 100u64).unwrap(); bets.createaccount(1u64, 2u64, 100u64).unwrap(); // Create a bet with 2 outcomes bets.createbet( 1u64, 1u64, "Who will win the Rocket League 1v1 ?", &vec!["Alice", "Bob"], ).unwrap(); // Alice bets on herself (option with id 0) with 10 coins bets.beton(1u64, 0u64, 0u64, 10).unwrap(); // Bob bets on himself (option with id 1) with 40 coins bets.beton(1u64, 1u64, 1u64, 40).unwrap(); // Charlie bets on Alice with half of his coins (50) bets.beton(1u64, 0u64, 2u64, 0.5).unwrap(); // asserts that the money is gone from their accounts asserteq!(bets.balance(1u64, 0u64).unwrap(), 90); asserteq!(bets.balance(1u64, 1u64).unwrap(), 60); asserteq!(bets.balance(1u64, 2u64).unwrap(), 50); // lock the bet bets.lockbet(1u64).unwrap(); // ... // Rocket league 1v1 occurs // ... // Alice ended up winning ! we resolve the bet with option of id 0 bets.resolve(1u64, 0u64).unwrap(); // The winning side gets 10 + 40 + 50 = 100 coins // split proportionally among the betters // Alice had bet 10 out of 60 of this option, she wins 100(10/60) = 16.6 rounded to 17 assert_eq!(bets.balance(1u64, 0u64).unwrap(), 107); // Bob doesn't win anything since he bet on the wrong option assert_eq!(bets.balance(1u64, 1u64).unwrap(), 60); // Charlie had bet 50 out of 60 of this option, he wins 100(50/60) = 83.3 rounded to 83 assert_eq!(bets.balance(1u64, 2u64).unwrap(), 133); Ok(()); }

fn main() { if let Err(why) = bet_demo() { println!("{:?}", why); } } ```