$ npm install @hyperdivision/eth-checksumeth-checksumEthereum address checksum with EIP-1191 support
var checksum = require('eth-checksum')
console.log(checksum.encode('0x27b1fdb04752bbc536007a920d24acb045561c26'))
console.log(checksum.verify('0x27b1fdb04752bbc536007a920d24acb045561c26'))
// With chain id
console.log(checksum.encode('0x27b1FdB04752BBc536007A920D24ACB045561c26', 30))
console.log(checksum.verify('0x27b1FdB04752BBc536007A920D24ACB045561c26', 30))
const addrStr = checksum.encode(address, [chainId = null])Encode address with optional chainId. Can encode a string or a Buffer
const bool = checksum.verify(address, [chainId = null])Validate address with optional chainId. Can validate a string or a Buffer
npm install eth-checksum