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@metamask/utils

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@metamask/utils

Various JavaScript/TypeScript utilities of wide relevance to the MetaMask codebase

  • 11.0.0
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What is @metamask/utils?

@metamask/utils is a utility library provided by MetaMask that offers a variety of helper functions and utilities to facilitate Ethereum and blockchain development. It includes functions for handling Ethereum addresses, hex strings, and other common tasks in the Ethereum ecosystem.

What are @metamask/utils's main functionalities?

Hex String Utilities

This feature provides utilities for working with hex strings, such as checking if a string is a valid hex string and converting hex strings to UTF-8.

const { isHexString, hexToUtf8 } = require('@metamask/utils');

const hex = '0x68656c6c6f';
console.log(isHexString(hex)); // true
console.log(hexToUtf8(hex)); // 'hello'

Ethereum Address Utilities

This feature includes functions for validating Ethereum addresses and converting them to checksum addresses.

const { isValidAddress, toChecksumAddress } = require('@metamask/utils');

const address = '0x742d35Cc6634C0532925a3b844Bc454e4438f44e';
console.log(isValidAddress(address)); // true
console.log(toChecksumAddress(address)); // '0x742d35Cc6634C0532925a3b844Bc454e4438f44e'

Type Conversion Utilities

This feature provides utilities for converting between different types, such as numbers and hex strings.

const { numberToHex, hexToNumber } = require('@metamask/utils');

const number = 12345;
const hex = numberToHex(number);
console.log(hex); // '0x3039'
console.log(hexToNumber(hex)); // 12345

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Package last updated on 26 Nov 2024

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