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TRANSACTION_COST
Transaction cost in Ether. It can be changed while running tasks in case there's need to.
E.g. If you need to mint 5 tokens, each costing 0.05 Ether, you will be required to pay 0.25 Ether + Gas fees. 0.25 will be the transaction cost.
Remember to use .
to split decimal numbers, DO NOT USE ,