Not directly answering your question, but giving you some general advice since this is your first contract: 1) Make the other party agree that all IP belongs t

Not directly answering your question, but giving you some general advice since this is your first contract: 1) Make the other party agree that all IP belongs to you until the final invoice is paid. This is often your only leverage should your client decide to stop paying you. 2) Send weekly updates VIA EMAIL to your client on what you've done. Do not do this over Slack or any other communications medium that they control. If they decide to revoke your access on Slack, you will no longer have access to those logs and no proof. 3) Set terms for post-contract support. Under no circumstances should you be providing unlimited free support after the contract is over.