README.md

Ethereum Contract Metadata

A mapping of checksummed ethereum addresses to metadata, like names, and images of those addresses' logos.

All address keys follow the EIP 55 address checksum format.

Submit PRs to add valid logos, and obviously valid logos will be merged.

Usage

You can install from npm with npm install eth-contract-metadata and use it in your code like this:

const contractMap = require('eth-contract-metadata')
const toChecksumAddress = require('ethereumjs-util').toChecksumAddress

function imageElFor (address) {
  const metadata = iconMap[toChecksumAddress(address)]
  if (!('logo' in metadata)) {
    return false
  }
  const fileName = metadata.logo
  const path = `images/contract/${fileName}`
  const img = document.createElement('img')
  img.src = path
  img.style.width = '100%'
  return img
}

Submission Process

1. Fork this repository.
2. Add your logo image in a web-safe format to the images folder.
3. Add an entry to the contract-map.json file with the specified address as the key, and the image file's name as the value.

Criteria:

• The icon should be small, square, but high resolution, ideally a vector/svg.
• Do not add your entry to the end of the JSON map, messing with the trailing comma. Your pull request should only be an addition of lines, and any line removals should be deliberate deprecations of those logos.

A sample submission:

{
  "0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef": {
    "name": "ENS Registrar",
    "logo": "ens.svg"
  }
}

Tokens should include a field "erc20": true, and can include additional fields:

• symbol (a four-character or less ticker symbol)
• decimals (precision of the tokens stored)

A full list of permitted fields can be found in the permitted-fields.json file.