Unused Argument

Property	Value
Rule Code	NTX10
Severity	Warning

Background

Unused arguments can indicate mistakes in the code (forgotten logic) or unnecessary parameters that increase complexity and gas costs.

Purpose

Detects function arguments that are declared but never used within the function.

Example

# Non-compliant - argument '_unused' is never used in the function
@external
def process(_value: uint256, _unused: address) -> uint256:
    return _value * 2

# Compliant - all arguments are used
@external
def process_fixed(_value: uint256, _modifier: uint256) -> uint256:
    return _value * _modifier

The process function would be flagged by this rule because the _unused argument is declared but never used within the function.