Credenza3 Scanner EVM

Ethers.js

Ethers.js v6+ is required

<script src="https://cdnjs.cloudflare.com/ajax/libs/ethers/6.0.8/ethers.umd.min.js" integrity="sha512-B/0gQMZc/py0Ldqgnuen4yZzABN1sz6dv65+2pVQHgOlIcrshSTJsk7yCSWqh0wh94KUD4Lr5F4HSWzcZjhqqw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Installation

with npm

npm install @credenza3/scanner-evm

with yarn

yarn add @credenza3/scanner-evm

with pnpm

pnpm install @credenza3/scanner-evm

or include a script tag

<script src="https://unpkg.com/@credenza3/scanner-evm/dist/scanner.umd.js"></script>

Usage

import {Scanner} from '@credenza3/scanner-evm'

or

const Scanner = window.CredenzaScannerEvm

Create an instance of Credenza scanner

const scanner = new Scanner({target: '.scanner-placeholder'}) // query selector to render the scanner into.

Static

Scanner.events - list of events produced by scanner

Get a list of available video input devices

await scanner.listVideoInputDevices()

Scan

scanner.scan({
  deviceId?: string,
  isCloseButton?: boolean
  maxScansPerSecond? number // 25
})  // (await scanner.listVideoInputDevices())[0].id by default

Cancel

scanner.close()

Events

On capture

//         'capture'
scanner.on(Scanner.events.CAPTURE, ({ rawString, message, userAddress, scanType, chainId }) => {
  console.log('Scan completed', { rawString, message, userAddress })
})

On error

//         'error'
scanner.on(Scanner.events.ERROR, (err) => {
  console.log('Scan error:', err)
})

On cancel

//         'cancel'
scanner.on(Scanner.events.CAPTURE, () => {
  console.log('Scan canceled')
})

DEMO