PoC profit snapshotting is affected when used in nested functions

[janbro]

Snapshotting profit is printed incorrectly when used in nested functions. This is because the index of the initial balance snapshot is not recorded and passed to the printProfit function (always uses index 0 as the initial condition). Should be an easy fix to record the index of the initial snapshot and use that when calculating profit. However, formatting is not great. This may just be a limitation of using modifiers for snapshotting functionality, but logs get very messy when snapshotting is used in nested functions. This may be able to be solved with formatting with more information when printing.

ex.

function setUp() public {
        // Fork from specified block chain at block
        vm.createSelectFork("https://rpc.ankr.com/eth"); // , block_number);

        // Deploy attack contract
        attackContract = new AttackContract();

        // Fund attacker contract
        deal(EthereumTokens.USDC, address(attackContract), 1 * 10 ** 10);

        // Tokens to track during snapshotting
        tokens.push(EthereumTokens.USDC);

        setAlias(address(attackContract), "Attacker");

        console.log("\n>>> Initial conditions");
    }

    function testAttack() public snapshot(address(attackContract), tokens) {
        attackContract.initializeAttack();
        doSomething();
    }

    function doSomething() public snapshot(address(attackContract), tokens) {

    }

ex output:

Logs:
  
>>> Initial conditions
  --- USDC balance of [Attacker]:       10000.0 ---
  
  
>>> Initialize attack
  
>>> Execute attack
  
>>> Complete attack
  --- USDC balance of [Attacker]:       0.0 ---
  
  --- USDC balance of [Attacker]:       0.0 ---
  
  ~~~ Profit for [Attacker]
  -----------------------------------------------------------------------------------------
               Token address                    |       Symbol  |       Profit
  -----------------------------------------------------------------------------------------
  0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48    |       USDC    |       -10000.0
  
  --- USDC balance of [Attacker]:       0.0 ---
  
  ~~~ Profit for [Attacker]
  -----------------------------------------------------------------------------------------
               Token address                    |       Symbol  |       Profit
  -----------------------------------------------------------------------------------------
  0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48    |       USDC    |       -10000.0