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@ethersproject/bytes

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@ethersproject/bytes

Bytes utility functions for ethers.

  • 5.7.0
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What is @ethersproject/bytes?

@ethersproject/bytes is a utility library for handling and manipulating byte arrays in JavaScript. It is part of the ethers.js library, which is widely used for interacting with the Ethereum blockchain. This package provides various functions to work with byte arrays, including conversion, concatenation, slicing, and more.

What are @ethersproject/bytes's main functionalities?

Conversion between hex strings and byte arrays

This feature allows you to convert a hex string to a byte array and vice versa. The `arrayify` function converts a hex string to a Uint8Array, and the `hexlify` function converts a Uint8Array back to a hex string.

const { arrayify, hexlify } = require('@ethersproject/bytes');

const hexString = '0x123456';
const byteArray = arrayify(hexString);
console.log(byteArray); // Uint8Array [ 18, 52, 86 ]

const newHexString = hexlify(byteArray);
console.log(newHexString); // '0x123456'

Concatenation of byte arrays

This feature allows you to concatenate multiple byte arrays into a single byte array. The `concat` function takes an array of Uint8Arrays and returns a new Uint8Array that is the concatenation of all the input arrays.

const { concat } = require('@ethersproject/bytes');

const byteArray1 = new Uint8Array([1, 2, 3]);
const byteArray2 = new Uint8Array([4, 5, 6]);
const concatenatedArray = concat([byteArray1, byteArray2]);
console.log(concatenatedArray); // Uint8Array [ 1, 2, 3, 4, 5, 6 ]

Slicing byte arrays

This feature allows you to slice a byte array to get a subarray. The `slice` function takes a byte array and start and end indices, and returns a new byte array that is a subarray of the input array.

const { arrayify, hexlify, slice } = require('@ethersproject/bytes');

const hexString = '0x1234567890abcdef';
const byteArray = arrayify(hexString);
const slicedArray = slice(byteArray, 2, 6);
console.log(hexlify(slicedArray)); // '0x34567890'

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Package last updated on 19 Aug 2022

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