sovaslava / hardhat-otb

Plugin for hardhat. Opcodes to bytecode

Hardhat plugin for translate opcodes to bytecode

You can translate contract bytecode to opcodes and watch what is in the stack.

Installation

Step 1: Install the package

npm i @sovaslava/hardhat-otb

Step 2: Add to your hardhat.config.ts file

import "@sovaslava/hardhat-otb";

Usage

--help:

npx hardhat otb --help

result:

Usage: hardhat [GLOBAL OPTIONS] otb --file <STRING> [--stack <STRING>]

OPTIONS:

  --file        path to file with opcodes
  --stack       write stack into other file

otb: Opcodes to bytecode

converting mnemonic opcodes into bytecode string:

Prepare text file with opcodes, each opcode with args in separated line. Let it be opcodes.txt. You can choose any other name:

PUSH1 0x42
PUSH1 0
MSTORE
PUSH1 32
PUSH1 0
RETURN

npx hardhat otb --file opcodes.txt

In console you can see bytecode:

604260005260326000f3

--stack feature:

default value for --stack option - false

npx hardhat otb --file opcodes.txt --stack true

the otb-*.txt file will be created in the project directory:

PUSH1 0x42            | [ 0x42 ]
PUSH1 0x00            | [ 0x00 ][ 0x42 ]
MSTORE                |
PUSH1 0x32            | [ 0x32 ]
PUSH1 0x00            | [ 0x00 ][ 0x32 ]
RETURN                |