f_inv_c.sol

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.6.0 <0.9.0;

contract farmerInvestorContract {
    /**
    Requirements in the contract
    1. Address of the contract for receiving transfers from investors
    2. Investor address from which funds would be pushed to the contract address
    3. Total amount of required investment for the particular farm season
       3a. In cases where only one investor is interested in the farm, he/she 
           then pays the total required amount and is guaranteed the total returns
           from the farm at the end of the farm season

           This amount is converted from Ethereum into USD/Fiat currency.
        
       3b. In cases where there are multiple investors interested in the same farm,
           the farmland is tokenized with respect to total required investment amount

           This amount is then converted from Ethereum into USD/Fiat currency.

    4. A simulated time duration for the farm season; at the end of this season,
       the produce harvested is recorded

    5. An estimate of the returns from selling the produce harvested is then converted 
       into its equivalent worth in ethereum and sent to the respective investor(s)

    6. The contract is then closed from receiving any payments; it is reopened at the beginning of 
        a new farm season if the conditions remain same as the previous farm season.
    */
    
    // keep track of all investors who send funding to this contract
    mapping(address => uint256) public investorAddressAndAmountInvested;
    address[] public investors;
    address public contractOwner;

    constructor() {
        contractOwner = msg.sender;
    }

    function checkInvestorInvestment(address _investor) public payable returns (uint256) {
        // We check the amount of investment made by each investor
        investorAddressAndAmountInvested[msg.sender] += msg.value;
        return investorAddressAndAmountInvested[_investor];
    }






}