l1-lottery-contracts/build/src/Structs/Ticket.js

This repo contains smart contracts and related scripts for ZkNoid L1 Lottery proposed [here](https://forums.minaprotocol.com/t/zknoid-l1-lottery/6269)

import { Struct, Provable, UInt32, Poseidon, Bool, PublicKey, UInt64, } from 'o1js';
import { NUMBERS_IN_TICKET, SCORE_COEFFICIENTS } from '../constants.js';
function getRandomInt(max) {
    return Math.floor(Math.random() * max);
}
export class Ticket extends Struct({
    numbers: Provable.Array(UInt32, NUMBERS_IN_TICKET),
    owner: PublicKey,
    amount: UInt64,
}) {
    static from(numbers, owner, amount) {
        if (numbers.length != NUMBERS_IN_TICKET) {
            throw new Error(`Wrong amount of numbers. Got: ${numbers.length}, expect: ${NUMBERS_IN_TICKET}`);
        }
        return new Ticket({
            numbers: numbers.map((number) => UInt32.from(number)),
            owner,
            amount: UInt64.from(amount),
        });
    }
    static random(owner) {
        return new Ticket({
            numbers: [...Array(NUMBERS_IN_TICKET)].map(() => UInt32.from(getRandomInt(9) + 1)),
            owner,
            amount: UInt64.from(1),
        });
    }
    check() {
        return this.numbers.reduce((acc, val) => acc.and(val.lessThan(UInt32.from(10)).and(val.greaterThan(UInt32.from(0)))), Bool(true));
    }
    hash() {
        return Poseidon.hash(this.numbers
            .map((number) => number.value)
            .concat(this.owner.toFields())
            .concat(this.amount.value));
    }
    getScore(winningCombination) {
        let result = UInt64.from(0);
        for (let i = 0; i < NUMBERS_IN_TICKET; i++) {
            result = result.add(Provable.if(winningCombination[i].equals(this.numbers[i]), UInt64.from(1), UInt64.from(0)));
        }
        const conditions = [...Array(NUMBERS_IN_TICKET + 1)].map((val, index) => result.equals(UInt64.from(index)));
        const values = SCORE_COEFFICIENTS.map((val) => UInt64.from(val).mul(this.amount));
        return Provable.switch(conditions, UInt64, values);
    }
}
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