[WIP] Rewrite in typescript, add more methods

.gitignore

@@ -1,2 +1,5 @@
 node_modules
 package-lock.json
+dist
+.nyc_output
+coverage

.nycrc

@@ -0,0 +1,3 @@
+{
+  "extends": "@ethereumjs/config-nyc"
+}

.prettierignore

@@ -0,0 +1,6 @@
+node_modules
+.vscode
+package.json
+dist
+.nyc_output
+docs

README.md

@@ -1,13 +1,15 @@
-# SYNOPSIS 
+# SYNOPSIS
+
 [![NPM Package](https://img.shields.io/npm/v/fixed-bn.js.svg?style=flat-square)](https://www.npmjs.org/package/fixed-bn.js)
 [![Build Status](https://img.shields.io/travis/ewasm/fixed-bn.js.svg?branch=master&style=flat-square)](https://travis-ci.org/ewasm/fixed-bn.js)
 [![Coverage Status](https://img.shields.io/coveralls/ewasm/fixed-bn.js.svg?style=flat-square)](https://coveralls.io/r/ewasm/fixed-bn.js)
 
-[![js-standard-style](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)  
+[![js-standard-style](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
 
 a bn.js factory wrapper that constrains numbers to a fixed width
 
 # USAGE
+
 ```javascript
 const FixedBN = require('fixed-bn.js')
 
@@ -22,85 +24,88 @@ bnNum.toBuffer()
 
 // you can also create an arbitary fixed lenght bn
 // max bit lenght is 199 bits and min length is 2 bits
-const I199 = FixedBN(199, 2) 
+const I199 = FixedBN(199, 2)
 const newBnNum = new I199(390248)
 ```
 
 # API
-Since this module extends [BN.js](https://github.com/indutny/bn.js/) it has the methods as it does plus a few extras.
 
+Since this module extends [BN.js](https://github.com/indutny/bn.js/) it has the methods as it does plus a few extras.
 
 ## factory
 
-[./index.js:11-87](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L11-L87 "Source code on GitHub")
+[./index.js:11-87](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L11-L87 'Source code on GitHub')
 
 A factory that produces BN.js constructors for a given width
 
 **Parameters**
 
--   `maxWidth` **Integer** the max length in bits that the bn.js instance can handle
--   `minWidth` **Integer** the min length in bits that the bn.js instance can handle
+- `maxWidth` **Integer** the max length in bits that the bn.js instance can handle
+- `minWidth` **Integer** the min length in bits that the bn.js instance can handle
 
 Returns **bn.js** returns a bn.js constuctor that that is constained to `maxWidth` and `minWidth`
 
 ## builtin length
+
 the factory has the following builtins
+
 - `FixedBN.U64`
 - `FixedBN.U128`
 - `FixedBN.U160`
 - `FixedBN.U256`
 
 ## bn.js instance
+
 Each instance has the following additional methods
 
 ## maxWidth
 
-[./index.js:35-37](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L35-L37 "Source code on GitHub")
+[./index.js:35-37](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L35-L37 'Source code on GitHub')
 
 retuns Max Width
 
-Returns **integer** 
+Returns **integer**
 
 ## minWidth
 
-[./index.js:43-45](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L43-L45 "Source code on GitHub")
+[./index.js:43-45](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L43-L45 'Source code on GitHub')
 
 retuns Min Width
 
-Returns **integer** 
+Returns **integer**
 
 ## fromBuffer
 
-[./index.js:66-68](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L66-L68 "Source code on GitHub")
+[./index.js:66-68](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L66-L68 'Source code on GitHub')
 
 converts a buffer to a fixed-bn.js
 
 **Parameters**
 
--   `value` **([string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String) | integer)** 
--   `endain` **[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)** 
--   `endian`   (optional, default `'be'`)
+- `value` **([string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String) | integer)**
+- `endain` **[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)**
+- `endian` (optional, default `'be'`)
 
 ## isFixBN
 
-[./index.js:74-76](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L74-L76 "Source code on GitHub")
+[./index.js:74-76](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L74-L76 'Source code on GitHub')
 
 checks if a BN instance is a fixed BN instance
 
 **Parameters**
 
--   `bn` **bn.js** 
+- `bn` **bn.js**
 
 ## isSameWidth
 
-[./index.js:82-84](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L82-L84 "Source code on GitHub")
+[./index.js:82-84](https://github.com/ewasm/fixedBN/blob/814e88711940f48efc341ed0c1296f7fa6cdd111/./index.js#L82-L84 'Source code on GitHub')
 
 checks if a fixed-bn instance is the same width as the contructor
 
 **Parameters**
 
--   `fixBN` **bn.js** 
-
+- `fixBN` **bn.js**
 
 # LICENSE
-[MPL-2.0](https://tldrlegal.com/license/mozilla-public-license-2.0-(mpl-2))
+
+[MPL-2.0](<https://tldrlegal.com/license/mozilla-public-license-2.0-(mpl-2)>)

docs/README.md

@@ -0,0 +1,74 @@
+
+#  fixed-bn.js
+
+## Index
+
+### Classes
+
+* [Factory](classes/factory.md)
+* [FixedWidthBN](classes/fixedwidthbn.md)
+
+### Type aliases
+
+* [Endianness](#endianness)
+
+### Variables
+
+* [U128](#u128)
+* [U160](#u160)
+* [U256](#u256)
+* [U64](#u64)
+
+---
+
+## Type aliases
+
+<a id="endianness"></a>
+
+###  Endianness
+
+**Ƭ Endianness**: *"le" \| "be"*
+
+*Defined in [fixed-width.ts:6](https://github.com/ewasm/fixed-bn.js/blob/master/src/fixed-width.ts#L6)*
+
+___
+
+## Variables
+
+<a id="u128"></a>
+
+### `<Const>` U128
+
+**● U128**: *[Factory](classes/factory.md)* =  new Factory(128)
+
+*Defined in [index.ts:7](https://github.com/ewasm/fixed-bn.js/blob/master/src/index.ts#L7)*
+
+___
+<a id="u160"></a>
+
+### `<Const>` U160
+
+**● U160**: *[Factory](classes/factory.md)* =  new Factory(160)
+
+*Defined in [index.ts:8](https://github.com/ewasm/fixed-bn.js/blob/master/src/index.ts#L8)*
+
+___
+<a id="u256"></a>
+
+### `<Const>` U256
+
+**● U256**: *[Factory](classes/factory.md)* =  new Factory(256)
+
+*Defined in [index.ts:6](https://github.com/ewasm/fixed-bn.js/blob/master/src/index.ts#L6)*
+
+___
+<a id="u64"></a>
+
+### `<Const>` U64
+
+**● U64**: *[Factory](classes/factory.md)* =  new Factory(64)
+
+*Defined in [index.ts:9](https://github.com/ewasm/fixed-bn.js/blob/master/src/index.ts#L9)*
+
+___
+

docs/classes/factory.md

@@ -0,0 +1,134 @@
+[fixed-bn.js](../README.md) > [Factory](../classes/factory.md)
+
+# Class: Factory
+
+Convenience class for creating FixedWidthBN values with the same width.
+
+## Hierarchy
+
+**Factory**
+
+## Index
+
+### Constructors
+
+* [constructor](factory.md#constructor)
+
+### Properties
+
+* [width](factory.md#width)
+
+### Methods
+
+* [fromBN](factory.md#frombn)
+* [fromBuffer](factory.md#frombuffer)
+* [fromNumber](factory.md#fromnumber)
+* [fromString](factory.md#fromstring)
+
+---
+
+## Constructors
+
+<a id="constructor"></a>
+
+###  constructor
+
+⊕ **new Factory**(width: *`number`*): [Factory](factory.md)
+
+*Defined in [factory.ts:9](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L9)*
+
+**Parameters:**
+
+| Name | Type |
+| ------ | ------ |
+| width | `number` |
+
+**Returns:** [Factory](factory.md)
+
+___
+
+## Properties
+
+<a id="width"></a>
+
+###  width
+
+**● width**: *`number`*
+
+*Defined in [factory.ts:9](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L9)*
+
+___
+
+## Methods
+
+<a id="frombn"></a>
+
+###  fromBN
+
+▸ **fromBN**(value: *`BN`*): [FixedWidthBN](fixedwidthbn.md)
+
+*Defined in [factory.ts:19](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L19)*
+
+**Parameters:**
+
+| Name | Type |
+| ------ | ------ |
+| value | `BN` |
+
+**Returns:** [FixedWidthBN](fixedwidthbn.md)
+
+___
+<a id="frombuffer"></a>
+
+###  fromBuffer
+
+▸ **fromBuffer**(value: *`Buffer`*, endian?: *[Endianness](../#endianness)*): [FixedWidthBN](fixedwidthbn.md)
+
+*Defined in [factory.ts:27](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L27)*
+
+**Parameters:**
+
+| Name | Type | Default value |
+| ------ | ------ | ------ |
+| value | `Buffer` | - |
+| `Default value` endian | [Endianness](../#endianness) | &quot;be&quot; |
+
+**Returns:** [FixedWidthBN](fixedwidthbn.md)
+
+___
+<a id="fromnumber"></a>
+
+###  fromNumber
+
+▸ **fromNumber**(value: *`number`*): [FixedWidthBN](fixedwidthbn.md)
+
+*Defined in [factory.ts:15](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L15)*
+
+**Parameters:**
+
+| Name | Type |
+| ------ | ------ |
+| value | `number` |
+
+**Returns:** [FixedWidthBN](fixedwidthbn.md)
+
+___
+<a id="fromstring"></a>
+
+###  fromString
+
+▸ **fromString**(value: *`string`*, base?: *`number`*): [FixedWidthBN](fixedwidthbn.md)
+
+*Defined in [factory.ts:23](https://github.com/ewasm/fixed-bn.js/blob/master/src/factory.ts#L23)*
+
+**Parameters:**
+
+| Name | Type | Default value |
+| ------ | ------ | ------ |
+| value | `string` | - |
+| `Default value` base | `number` | 16 |
+
+**Returns:** [FixedWidthBN](fixedwidthbn.md)
+
+___
+