BigNumber Utils

The bignumber-utils package empowers developers to effortlessly perform accurate and reliable decimal and non-decimal arithmetic in JavaScript, leveraging the robust foundation of the bignumber.js library.

This package provides a streamlined interface for working with arbitrary-precision numbers, eliminating the limitations and potential inaccuracies associated with standard JavaScript number representation. With bignumber-utils, you can confidently handle complex calculations, financial transactions, scientific computations, and more, ensuring precise results every time.

Getting Started

Install the package:

npm install -S bignumber-utils

Usage

import {
  getBigNumber,
  isBigNumber,
  isInteger,
  isFloat
  prettifyValue,
  calculateSum,
} from 'bignumber-utils';

let value = getBigNumber('1456550199.54631546987123654159');


isBigNumber(value); // true


value = processValue(value, { 
  decimalPlaces: 18, 
  roundingMode: 'ROUND_HALF_UP',
  type: 'string'
});
// '1456550199.546315469871236542'

isBigNumber(value); // false
isInteger(value); // false
isFloat(value); // true


prettifyValue(value, { format: { prefix: '$' } });
// '$1,456,550,199.546315469871236542'

prettifyValue(value, { 
  format: { 
    groupSeparator: '.', 
    decimalSeparator: ',',
    suffix: ' BTC'
  } 
});
// '1.456.550.199,546315469871236542 BTC'


calculateSum([1, 86, '55', 46.33, '47.55', getBigNumber(8041.663321), 485, '99.11', getBigNumber(-800.654)]);
// 8061

calculateSum(
  ['0.286304850273819327', '0.00290532', '0.00251940040614675', '0.03506759540691015'], 
  { decimalPlaces: 18, type: 'string' });
// '0.326797166086876227'

API

Value Processors

• getBigNumber instantiates BigNumber from a valid numeric value.

• processValue processes and outputs a value to match the requirements specified in the configuration (if any).

• prettifyValue generates the string representation of a value after being processed and formatted to match the requirements specified in the configuration (if any).

Helpers

• isBigNumber verifies if the value is a BigNumber Instance.

• isNumber verifies if the value is a number in any of the supported types (IBigNumberValue).

• isInteger verifies if the value is an integer in any of the supported types (IBigNumberValue).

• isFloat verifies if the value is a float in any of the supported types (IBigNumberValue).

Essential Calculations

• calculateSum calculates the sum for an array of values.

• calculateMin identifies the smallest value in an array.

• calculateMax identifies the largest value in an array.

• calculateMean calculates the mean for an array of values.

• calculateMedian calculates the median for an array of values.

Percentage Calculations

• calculatePercentageChange calculates the percentage change experienced by a value.

• adjustByPercentage changes a value by a percentage.

• calculatePercentageRepresentation calculates the percentage representation of a value based on a total.

Financial Calculations

• calculateExchange calculates the asset amount that will be received once the exchange executes.

• calculateExchangeFee calculates the fee amount that will be charged when executing a currency exchange based on a percentage.

• calculateWeightedEntry calculates the weighted average trade price when a position can have several entries at different prices for different amounts.

BigNumber Methods

Since this library is built on top of bignumber.js, whenever you invoke getBigNumber(value) or buildNumber(value, { buildType: 'bignumber' }) you can make use of any method within the BigNumber Instace.

The list of methods can be found here

Built With

• TypeScript

Running the Tests

$ npm run test:unit

License

MIT

Acknowledgments

• bignumber.js

@TODOS

• [ ] Improve the docs

Deployment

Install dependencies:

$ npm install

Build the library:

$ npm start

Publish to npm:

$ npm publish