Add balanceDiff on simulate bundle endpoint

[yvesfracari]

To test:

• Run the automatic tests locally.

• Test the simulation bundle endpoint result. If you need some example to test use:

  • from: 0x8ad599c3a0ff1de082011efddc58f1908eb6e6d8
  • to: 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
  • calldata: 0xa9059cbb000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc200000000000000000000000000000000000000000000000000000000000186a0
  • chainId: 1

  With that you should be able to see a positive amount of balance diff on the address 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2 and negative for the address 0x8ad599c3a0ff1de082011efddc58f1908eb6e6d8.

  If you can add this as two equal transactions on the bundle, and the results should double from the single transaction test.