i3arba/1-horse-store

Cyfrin - Assembly & Formal Verification Course

Horse Store

Session Goal

1. Write a basic simpleStorage/horse store

Disclaimer

Please be aware that this readme is basically a notepad. If you want to read my notes, keep going. If not, you can go directly to the code.

Questions

1. Where did this data come from? How did Remix know to send this data?

• In the foundry full course we learned that if we take the function name + param, we can transform it into the machine readable function signature cast sig "updateHorseNumber(uint256). When we call the function, solidity does a Function Dispatch/Method Dispatch to execute the function and send the data.

  • What is Function Dispatch/Method Dispatch?
    • The algorithm used to determine which functions/commands should be run/invoked in response to a message.
    • In the EVM, this is when a smart contract uses the first 4 bytes of a calldata to determine which function(which is a group of opcodes) to send the calldata to.
  • How does the EVM know how to interpret/interact with data?

2. How does Remix know to update this number of horses with this data?