What is payinvoice-frontend?

taiwoqudus1/payinvoice-frontend — explained in plain English

Analysis updated 2026-05-18

★ 0HTMLAudience · developerComplexity · 2/5Setup · easy

Mindmap

mindmap
  root((PayInvoice))
    What it does
      Sends USDC payments
      Attaches invoice memo
      Emits on-chain event
    Tech stack
      HTML and JavaScript
      Viem
      MetaMask
      Arc Testnet
    Use cases
      Freelancer invoicing
      B2B payments
      Stablecoin prototyping
    Audience
      Web3 developers
    Setup
      No build step
      npx serve locally
      Needs MetaMask wallet

mindmap root((PayInvoice)) What it does Sends USDC payments Attaches invoice memo Emits on-chain event Tech stack HTML and JavaScript Viem MetaMask Arc Testnet Use cases Freelancer invoicing B2B payments Stablecoin prototyping Audience Web3 developers Setup No build step npx serve locally Needs MetaMask wallet

What do people build with it?

USE CASE 1

Send a USDC test payment on Arc Testnet with an invoice number attached as a memo.

USE CASE 2

Prototype a freelancer or business invoicing flow built on stablecoin payments.

USE CASE 3

Learn how a minimal Viem and MetaMask frontend talks to a custom payment contract.

What is it built with?

HTMLJavaScriptViemMetaMaskArc Testnet

How does it compare?

	taiwoqudus1/payinvoice-frontend	amureki/sweatbucks	anikchand461/ragbucket
Stars	0	—	0
Language	HTML	HTML	HTML
Last pushed	—	2025-08-15	—
Maintenance	—	Quiet	—
Setup difficulty	easy	easy	easy
Complexity	2/5	1/5	2/5
Audience	developer	general	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Requires a MetaMask wallet configured for Arc Testnet plus test USDC to send payments.

So what is it?

PayInvoice is a small web frontend for sending USDC payments on the Arc Testnet. USDC is a stablecoin cryptocurrency, and Arc Testnet is a test blockchain built by Circle specifically for stablecoin transactions. MetaMask is a browser based crypto wallet that people use to sign and approve blockchain transactions, and this app relies on it for that purpose. Using the app, a person connects their MetaMask wallet while it is set to Arc Testnet, then fills in a recipient's wallet address, an amount of USDC to send, and a memo field, such as an invoice number. They then approve the USDC spend and confirm the payment. Each completed payment triggers an on-chain event called PaymentSent that records the memo alongside the transaction, which the README suggests could work as a simple building block for freelancer invoicing, business to business payments, or any USDC transaction where you want to attach a short note. The project points to two specific smart contracts already deployed on Arc Testnet: the PayInvoice contract that handles the payment logic, and the USDC token contract itself, and it links to a block explorer where those contracts can be viewed. On the technical side, the frontend is built with plain HTML and JavaScript and has no build step, so there is no compiling or bundling required to run it. It uses a library called Viem to talk to the blockchain and relies on MetaMask for signing transactions. To run it locally, the README shows a single command that serves the files and opens the app in a browser. The README does not state a license for this project.

Copy-paste prompts

Prompt 1

Explain how PayInvoice connects to MetaMask and sends a USDC payment on Arc Testnet.

Prompt 2

Help me run PayInvoice locally using the npx serve command.

Prompt 3

Walk me through what the PaymentSent on-chain event records for each payment.

Prompt 4

Show me how Viem is used in this project to interact with the blockchain.

Frequently asked questions