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109 tools

/ Revert Reason Decoder

Input Method

Revert Data (Hex)

Common Error Selectors

0x08c379a0Error

Error(string)

0x4e487b71Panic

Panic(uint256)

Panic Codes Reference

0x00Generic panic

0x01Assert failed

0x11Arithmetic overflow/underflow

0x12Division or modulo by zero

0x21Invalid enum value

0x22Invalid storage byte array access

0x31Pop on empty array

0x32Array index out of bounds

0x41Out of memory

0x51Invalid internal function call

Error Types: Solidity has three main error types:

require(): Returns Error(string) with custom message
revert CustomError(): Custom errors with parameters (more gas efficient)
Panic: System errors like overflow, divide by zero, array bounds

/ Selected Tool

Revert Reason Decoder

Decode revert reasons from failed transactions

■ 01

What are Revert Reasons?

When a transaction fails on Ethereum, it reverts with an error message. This error is encoded as hex data. Common error types include require() messages, custom errors, and panic codes from system failures.

■ 02

How does it work?

Error Types require() errors return Error(string) with a message. Custom errors are more gas-efficient but need the ABI to decode. Panic errors indicate system failures like overflow, division by zero, or array bounds v…

■ 03

Sample Cases

Covers Require Message - Insufficient Balance, Panic Code 0x11 - Arithmetic Overflow, and Custom Error - InsufficientLiquidity so you can compare common inputs and outputs quickly.

/ Code

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/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// Decode revert reasons from failed transactions

// Common error selectors
const ERROR_SELECTOR = "0x08c379a0"; // Error(string)
const PANIC_SELECTOR = "0x4e487b71"; // Panic(uint256)

function decodeRevertReason(errorData: string): string {
  const selector = errorData.slice(0, 10);

  if (selector === ERROR_SELECTOR) {