web3-validator

web3-validator

This is a sub-package of web3.js.

web3-validator contains functions for validating objects.

Installation

You can install the package either using NPM or using Yarn

Using NPM

npm install web3-validator

Using Yarn

yarn add web3-validator

Getting Started

• :writing_hand: If you have questions submit an issue or join us on Discord

Usage

You can use the the validator by importing as and using to validate;

import { validator } from 'web3-validator';

// To validate and throw
validator.validate(['uint8', 'string'], [val1, val2]);

// To validate and return error
const errors = validator.validate(['uint8', 'string'], [val1, val2], { silent: true });

To see more examples of schema you can use to validate check following file.

Following eth types are supported to validate.

Type	Input As	Description
uint	number, string, HexString	Unsigned integer, all ethereum compatible variants are also supported e.g. uint8, uint256. You can also use array specifiers as uint[] or uint[2]
int	number, string, HexString	Signed integer, all ethereum compatible variants are also supported e.g. int8, int256. You can also use array specifiers as int[] or int[2]
bytes	HexString, Buffer	Raw bytes. You can also use fixed length bytes as bytes[2]

| string | string | String values | | address | string, HexString | Ethereum network compatible address | | bloom | string, HexString | Check if a given string is a Eth bloom | | tuple | array | You can specify any tuple as nested arrays. e.g. ['uint', 'string']. For a custom tuple or array tuple you can use syntax e.g. ['tuple[3]', ['uint', 'string']] |

For the ethereum compatible data values should be passed as arrays e.g. for schema ['uint', 'string'] value should be passed as [2, 'my-string'].

You can also pass full ABI schema for the validation. e.g.

[{ "name": "owner", "type": "address" }]

The implementation of the validator is extension of JSON-Schema-Draft07 with a custom keyword eth. So you can use JSON-Schema compatible schema to validate any object based data as well.

Prerequisites

• :gear: NodeJS (LTS/Fermium)
• :toolbox: Yarn/Lerna

Package.json Scripts

Script	Description
clean	Uses rimraf to remove dist/
build	Uses tsc to build package and dependent packages
lint	Uses eslint to lint package
lint:fix	Uses eslint to check and fix any warnings
format	Uses prettier to format the code
test	Uses jest to run unit tests
test:integration	Uses jest to run tests under /test/integration
test:unit	Uses jest to run tests under /test/unit