		// @flow

		const { from: bufferOf } = Buffer
		const { inspect } = require('util')
		const evenZeroPaddedOf = require('./even-zero-padded-of')
		const isHex = require('./is-hex')

		/** @returns buffer representation of provided hex string. */
		function bufferOfHex(value /: string /) {
		@@ -10,5 +13,5 @@ if (!isHex(value)) {
		}
		return Buffer.from(value, 'hex')
		return bufferOf(evenZeroPaddedOf(value), 'hex')
		}

		module.exports = bufferOfHex

buffer-of-hex0x.js

		// @flow

		const { from: bufferOf } = Buffer
		const { inspect } = require('util')
		const evenZeroPaddedOf = require('./even-zero-padded-of')
		const isHex0x = require('./is-hex0x')

		function bufferOfHex0x(value /: string /) {
		/** @returns buffer representation of provided hex0x string. */
		function bufferOfHex0x(value /: string /) /: Buffer / {
		if (!isHex0x(value)) {
		throw new TypeError(`Expected hex0x string, got ${inspect(value)}.`)
		}
		return Buffer.from(value.slice(2), 'hex')
		return bufferOf(evenZeroPaddedOf(value.slice(2)), 'hex')
		}

		module.exports = bufferOfHex0x

Changelog.md

		# Changelog

		## [v3.3.0](../../compare/v3.2.1...v3.3.0) (2019-12-12)

		* Adding note on reject-timeout.
		* Adding race-promises helper.
		* Rearranging test to run linter first, adding BigInt as global to eslint.
		* Adding poor-man's big-int hack around flow not supporting bigint yet.
		* Adding buffer-of-unsigned helper.
		* Renaming hex-of-number to hex-of-unsigned.
		* Reusing hex-of-number helper to return correctly odd-padded hex.
		* Using padding helper in hex-of-number.
		* Updating buffer-of-hex/hex0x helpers to work correctly on odd strings.
		* Adding even-zero-padded-of helper.
		* Adding hex-of-number helper.
		* Adding is-safe-unsigned helper.
		* Updating changelog.

		## [v3.2.1](../../compare/v3.2.0...v3.2.1) (2019-12-03)
		@@ -4,0 +20,0 @@

hex0x-of-number.js

		// @flow

		const { inspect } = require('util')
		const isSafeNonNegative = require('./is-safe-non-negative')
		const hexOfNumber = require('./hex-of-number')

		/** @returns 0x-prefixed hex string representation of a safe, non-negative integer number. */
		/** @returns 0x-prefixed hex string representation of a safe, unsigned number. */
		function hex0xOfNumber(value /: number /) /: string / {
		if (!isSafeNonNegative(value)) {
		throw new TypeError(`Expected safe, non-negative number, got ${inspect(value)}.`)
		}
		return '0x' + value.toString(16)
		return '0x' + hexOfNumber(value)
		}

		module.exports = hex0xOfNumber

is-safe-non-negative.js

		// @flow

		const { isSafeInteger } = Number

		/** Returns `true` if value is safe integer greater than or equal to zero, `false` otherwise. */
		function isSafeNonNegative(value /: mixed /) /: boolean %checks / {
		return (
		typeof value === 'number' &&
		value >= 0 &&
		isSafeInteger(value)
		)
		}

		module.exports = isSafeNonNegative
		module.exports = require('./is-safe-unsigned')

package.json

		{
		"name": "@appliedblockchain/helpers",
		"version": "3.2.1",
		"version": "3.3.0",
		"description": "No dependency, single file helpers.",
		@@ -8,3 +8,3 @@ "main": "index.js",
		"doc": "npx documentation readme --section=Api *.js",
		"test": "flow check && eslint . && jest",
		"test": "eslint . && flow check && jest",
		"patch": "npm test && npm version patch && git push && git push --tags && npm publish",
		@@ -38,2 +38,5 @@ "minor": "npm test && npm version minor && git push && git push --tags && npm publish",
		]
		},
		"globals": {
		"BigInt": true
		}
		@@ -40,0 +43,0 @@ },

reject-timeout.js

		@@ -9,2 +9,4 @@ // @flow
		promise.finally(() => clearTimeout(timeoutId)),

		// TODO: This leaks promise object.
		new Promise((resolve, reject) => {
		@@ -11,0 +13,0 @@ timeoutId = setTimeout(

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