When do I have to pay the 0.03 ETH? December 10, 2021 01:13 You'll have to pay the amount once your smart contract is ready to be deployed (created in the blockchain). Related articles Do I have to pay 0.03 ETH for every collection I publish in KoalaMint? How much does it cost to launch a collection on your platform? Is your fee applicable for future sales? When does my collection is revealed? When do I have to pay gas fees with your platform?