Ethereum Cookbook

How to do it…

1. Create a new affiliate contract that inherits the lottery contract created in the previous recipe:

pragma solidity^0.4.23;import "./InvestableDAL.sol";contract AffiliateDAL is InvestableDAL {    //...}

2. Create a mapping to store the amount earned by each person with the help of the affiliate program:

mapping(address => uint) affiliate;

3. Create a function that can be used by someone to claim their affiliate earnings:

function getAffiliatePay() public {    //...}

4. Transfer the amount to the address and empty the affiliate mapping for each payout:

uint amount = affiliate[msg.sender];require(amount > 0);msg.senser.transfer(amount);affiliate[msg.sender] = 0;

5. Modify the play function to accept the affiliate address:

function play(uint ...