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contracts...FundMe.sol

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

// to get latest price data
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";

contract FundMe {

    mapping(address => uint256) public addressToAmountFunded;

    // "payable" function -> accespts payment
    // Every transaction has some inbuilt variables
    // "msg" 
    //      msg.sender => Sender of the transaction
    //      msg.value => amount of the transaction
    function fund() public payable {
        addressToAmountFunded[msg.sender] += msg.value;

        // Get the conversion rate of ETH -> USD
        // Need to solve the Oracle problem 
        //      -> avoid having a central place to get information from        

    }

    
    /**
     * get the ETH -> USD price feed smart contract address for Rinkebey testnet from -> https://docs.chain.link/docs/ethereum-addresses/
     * This smart contract implements the interface AggregatorV3Interface.
     * Therefore, we can call the method of this interface by using a 
     * reference variable "priceFeed" defined below
     */
    function getVersion() public view returns (uint256) {
        AggregatorV3Interface priceFeed = AggregatorV3Interface(0x8A753747A1Fa494EC906cE90E9f37563A8AF630e);
        return priceFeed.version();
    }
}