Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-License-Identifier: MIT

pragma solidity =0.8.17;

import "./interfaces/IAffiliateProgram.sol";

//
contract AffiliateProgram is IAffiliateProgram {
    struct Account {
        bool registered;
        address affiliate;
        address[] referrals;
    }

    mapping(address => Account) public accounts;

    event RegisteredAffiliate(address affiliate);
    event RegisteredReferer(address affiliate, address referrer);

    function register() external {
        require(!accounts[msg.sender].registered, "Already registered");

        accounts[msg.sender].registered = true;
        emit RegisteredAffiliate(msg.sender);
    }

    // @dev called by referral
    function register(address _affiliate) external {
        require(!accounts[msg.sender].registered, "Already registered");
        require(_affiliate != address(0), "Zero address affiliate");
        require(_affiliate != msg.sender, "You cannot refer yourself");

        uint len = accounts[_affiliate].referrals.length;
        if (len == 0) {
            accounts[_affiliate].registered = true;
            emit RegisteredAffiliate(_affiliate);
        }

        accounts[_affiliate].referrals.push(msg.sender);
        accounts[msg.sender].affiliate = _affiliate;
        accounts[msg.sender].registered = true;
        emit RegisteredAffiliate(msg.sender);
        emit RegisteredReferer(_affiliate, msg.sender);
    }

    /**
     * @dev Utils function for check whether an address has the referrer
     */
    function hasAffiliate(address _addr) external view override returns (bool result) {
        result = accounts[_addr].affiliate != address(0);
    }

    /**
     * @dev Utils function for check whether an address has the referrer
     */
    function countReferrals(address _addr) external view override returns (uint256 amount) {
        amount = accounts[_addr].referrals.length;
    }

    /**
     * @dev Utils function for check whether an address has the referrer
     */
    function getAffiliate(address _addr) external view override returns (address result) {
        result = accounts[_addr].affiliate;
    }

    /**
     * @dev Utils function for check whether an address has the referrer
     */
    function getReferrals(address _addr) external view override returns (address[] memory result) {
        result = accounts[_addr].referrals;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity =0.8.17;

interface IAffiliateProgram {
    function hasAffiliate(address _addr) external view returns (bool result);

    function countReferrals(address _addr) external view returns (uint256 amount);

    function getAffiliate(address _addr) external view returns (address account);

    function getReferrals(address _addr) external view returns (address[] memory results);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"affiliate","type":"address"}],"name":"RegisteredAffiliate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"affiliate","type":"address"},{"indexed":false,"internalType":"address","name":"referrer","type":"address"}],"name":"RegisteredReferer","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"accounts","outputs":[{"internalType":"bool","name":"registered","type":"bool"},{"internalType":"address","name":"affiliate","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"countReferrals","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"getAffiliate","outputs":[{"internalType":"address","name":"result","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"getReferrals","outputs":[{"internalType":"address[]","name":"result","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"}],"name":"hasAffiliate","outputs":[{"internalType":"bool","name":"result","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"register","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_affiliate","type":"address"}],"name":"register","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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