index/functions/validateDecimalRangeStrict.md

validateDecimalRangeStrict(value, min, max, fieldName): void

Validates decimal number within range (handles NaN, Infinity, type checking)

Centralizes strict decimal range validation for numeric inputs.

Replaces Pattern

Before (Duplicate across services):

const num = parseFloat(value);
if (isNaN(num) || num < min || num > max) {
  throw new ValidationError(`${fieldName} must be between ${min} and ${max}`);
}

After (Single call):

validateDecimalRangeStrict(value, min, max, 'slippageTolerance');

Parameters

Parameter	Type	Description
value	string | number	The value to validate (string or number)
min	number	Minimum allowed value (inclusive)
max	number	Maximum allowed value (inclusive)
fieldName	string	Field name for error messages (e.g., 'slippageTolerance', 'priceImpact')

Returns

void

Throws

If value is not a valid number within range, or if NaN/Infinity detected

Examples

Slippage tolerance validation

import { validateDecimalRangeStrict } from '../utils/validation-patterns';

function swap(slippage: unknown) {
  validateDecimalRangeStrict(slippage, 0, 1, 'slippageTolerance');
  // Validation passed - slippage is a valid decimal between 0 and 1
}

Price impact validation

import { validateDecimalRangeStrict } from '../utils/validation-patterns';

function calculateImpact(impactPercent: unknown) {
  validateDecimalRangeStrict(impactPercent, 0, 100, 'priceImpact');
  // Validation passed - impact is valid percentage between 0 and 100
}

Since

6.25.0