HashprintJS

HashprintJS is a small npm package written in TypeScript that generates customizable identicons.

Provide a username, wallet address, IP address or really any string you want and you'll get the Data URL of its hashprint - a pretty 7x7 bi-color image that allows you to easily distinguish and identify a piece of data.

Supports both client and server (making use of the Canvas API and node-canvas, respectively).

Installation

$ yarn add hashprintjs

Usage

const hashprint = require("hashprintjs");
const dataURL = await hashprint({ data: "hashprint", size: 40 });

You can then take the dataURL and assign it to an image src for example.

Customization

The function takes an object as argument which has the following properties:

Properties	Description
data	string - The data that generates the hashprint.
size?	number (default: 140) - The dimensions of the hashprint, in px.
bg?	string (default: "#00000000") - The background color of the hashprint, CSS color format.
saturation?	number (default: 0.7) - The saturation value of the hashprint colors, from 0 to 1.
lightness?	number (default: 0.5) - The lightness value of the hashprint colors, from 0 to 1.
likeness?	[number, number] (default: [0.50, 0.25]) - The probability of a cell to get color 1 and color 2 respectively. From 0 to 1, the sum can't be greater than 1 (the remaining value corresponds to the probability of getting an empty cell, background).
algorithm?	string (default: "SHA-256") - The algorithm used to get the hash of the data. The supported algorithms are SHA-256, SHA-384 and SHA-512.