Support for truffle v5 - use contract at specific address

The generated types don’t have function for use contract at a specific address: https://www.trufflesuite.com/docs/truffle/getting-started/interacting-with-your-contracts#use-a-contract-at-a-specific-address.

import BN from 'bn.js'
import { ERC20TokenContract } from '../src/types/ERC20Token'

const ERC20Token: ERC20TokenContract = artifacts.require('ERC20Token')

contract('ERC20Token', (accounts: string[]) => {
  it('test', async () => {
    let token = await ERC20Token.new('tst', 'test', new BN(18))
    await token.supply(accounts[0], accounts[1], new BN(10).pow(new BN(18)))
    console.log(await token.totalSupply())
    // typechain does not support this
    // let token2  = await ERC20Token.at(token.address);
  })
})

[ducquangkstn]

After a while, I figure out I must include typechain outDir in tsconfig.json

I add a PR to help others with the same issue https://github.com/ethereum-ts/TypeChain/pull/352

[quezak]

@ducquangkstn would you like to prepare & test a PR? We’re more versed in using ethers here 😃 This is the relevant file, it should be a simple matter of adding a static method declaration. You could even add some of the other contract static methods.