form validate-decimals.ts

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  import BigNumber from 'bignumber.js';
 
/**
 * @description Returns a fn that validates a number is within the specified decimal precision
 * Useful in conjunction with a form validation schema
 */
export function validateDecimalPrecision(allowedPrecision: number) {
  return (value: any) => {
    Iif (value === null || value === undefined) return false;
    // Explicit base ensures BigNumber doesn't use exponential notation
    // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
    const decimals = new BigNumber(value).toString(10).split('.')[1];
    return decimals === undefined || decimals.length <= allowedPrecision;
  };
}