w3sandbox/staking/gpt-fixed.py

from decimal import Decimal, getcontext

# Set precision context if needed
getcontext().prec = 28


class StakingContract:
    def __init__(self):
        self.rewards_pct = Decimal('0.7')
        self.community_pct = Decimal('0.2')
        self.developer_pct = Decimal('0.1')

        self.balances = {
            "stakes": Decimal('0.0'),
            "developer": Decimal('0.0'),
            "community": Decimal('0.0'),
        }

        self.users = {}

    def deposit(self, user: str, amount: float):
        amount = Decimal(amount)  # Convert to Decimal
        stake, reward, community, developer = self.calc_fee(amount)
        print(f'{user} staked {amount} ($JENNER)')

        # Distribute reward to existing users first
        self.distribute_reward(reward)

        self.add_fees_to_balances(stake, community, developer)
        self.add_stake_to_user(user, stake)

    def withdraw(self, user: str):
        if user not in self.users:
            print(f"No staked amount found for user {user}.")
            return Decimal('0.0')

        initial_stake = self.users[user]

        total_withdrawal = initial_stake

        # Update balances
        self.balances['stakes'] -= initial_stake

        # Reset user's stake to 0
        del self.users[user]

        print(f'{user} withdrew {total_withdrawal:.4f} ($JENNER)')
        return total_withdrawal

    def calc_fee(self, amount):
        fee = amount * Decimal('0.03')
        stake_amount = amount - fee

        rewards = fee * self.rewards_pct
        community = fee * self.community_pct
        developer = fee * self.developer_pct

        return stake_amount, rewards, community, developer

    def show_stats(self):
        print('\n--- POOL STATS ---')
        for k, v in self.balances.items():
            print(f'{k}: {v}')
        print('')
        print('--- USERS IN POOL ---')
        for k, v in self.users.items():
            print(f'{k}: {v}')
        print('')

    def add_stake_to_user(self, user: str, stake: Decimal):
        if user in self.users:
            self.users[user] += stake
        else:
            self.users[user] = stake

    def add_fees_to_balances(self, stake: Decimal, community: Decimal, developer: Decimal):
        self.balances['stakes'] += stake
        self.balances['developer'] += developer
        self.balances['community'] += community

    def distribute_reward(self, reward: Decimal):
        total_stakes = self.balances['stakes']
        if total_stakes > Decimal('0.0'):
            for user in self.users:
                user_stake = self.users[user]
                reward_share = (user_stake / total_stakes) * reward
                self.users[user] += reward_share

    def user_total_balance(self, user: str):
        if user in self.users:
            return self.users[user]
        return Decimal('0.0')


def main():
    pool = StakingContract()

    pool.deposit("owner", 50000)
    pool.deposit("user1", 10000)
    pool.deposit("user2", 10000)
    pool.deposit("user3", 10000)
    pool.deposit("user4", 10000)
    pool.deposit("user5", 10000)
    pool.deposit("user6", 10000)

    pool.show_stats()

    pool.withdraw("user1")
    pool.withdraw("user2")
    pool.withdraw("user3")
    pool.withdraw("user4")
    pool.withdraw("user5")
    pool.withdraw("user6")

    pool.withdraw("owner")

    pool.show_stats()


if __name__ == '__main__':
    main()