npm install '@metamask/etherscan-link' -S
const etherscanLink = require('@metamask/etherscan-link')
const networkId = '1'
const account = '0xFDEa65C8e26263F6d9A1B5de9555D2931A33b825'
const accountLink = etherscanLink.createAccountLink(account, networkId)
const hash = '0xa7540793de6b6ca7d3c948a8cc0a163bf107f5535a69353162ea9dec7ee7beca'
const txLink = etherscanLink.createExplorerLink(hash, networkId)
const token = '0xdac17f958d2ee523a2206206994597c13d831ec7'
const tokenTrackerLink = etherscanLink.createTokenTrackerLink(token, networkId)
// You can also track token balances by account
const accountTokenTrackerLink = etherscanLink.createTokenTrackerLink(token, networkId, account)