Compiling Contracts with the Huff Compiler

NOTE: Installing the Huff Compiler is a prerequisite for compiling contracts. See installing (opens new window) to install huffc.

Below we outline the few steps it takes to compile a Huff contract.

1. Create a file called addition.huff and enter the following:

   #define function add(uint256,uint256) nonpayable returns (uint256)
   
   #define macro MAIN() = {
      // Load our numbers from calldata and add them together.
      0x04 calldataload // [number1]
      0x24 calldataload // [number2]
      add               // [number1+number2]
   
      // Return our new number.
      0x00 mstore // Store our number in memory.
      0x20 0x00 return // Return it.
   }
   

2. Use huffc to compile the contract and output bytecode:

   huffc addition.huff --bytecode
   

   This will output something similar to:

   61000f8061000d6000396000f36004356024350160005260206000f3
   

You can find an in-depth explanation of this contract in The Basics (opens new window) tutorial.