Nullar Checkout

Pay ¤0 for anything.

Zero settlement. Instant. Final. Every exchange of nothing receives a receipt.

Coffee

NFT

Consulting

Anything

Buy anything for ¤0

Receipt

Amount	¤0
Status	PAID / SETTLED
Ownership	100% (unchanged)
Block	#0
Tx Hash

Every receipt carries the same transaction hash: Block #0. No new block is created. No value is transferred.

Embed

Add Nullar Checkout to your site

One script. One element. No wallet, no card, no account, no fees.

<script type="module" src="https://nullar.org/checkout/nullar-pay.js"></script>

<nullar-pay item="Coffee" merchant="Your Shop"></nullar-pay>

Or install from npm

For React, Vue, Svelte or any bundler. Package: @nullar/checkout. Dependencies: 0.

npm i @nullar/checkout

import '@nullar/checkout';

// anywhere in your markup:
<nullar-pay item="Coffee" merchant="Your Shop"></nullar-pay>

import { getBalance, mine } from '@nullar/checkout/core';

getBalance(); // 0
mine();       // { reward: 0, completedBeforeStart: true }

Options

item	What is being bought. Up to 48 characters.
merchant	Optional. Up to 48 characters.
label	Optional button text. ¤0 is always shown.
amount	Not supported. The amount is ¤0.
event nullar:paid	{ amount: 0, receiptId, stateChanged: false }
--nullar-pay-bg / -fg	CSS variables for button colors. Default: black on white.

Nullar Checkout is part of a conceptual art project. It is not a payment processor and does not accept, hold or transfer money or crypto-assets. A Nullar receipt is not proof of payment for any amount other than ¤0.