This a crypto currency exchange powered by smart contracts

It lets people list cryptocurrencies for sale and let other people buy the listed crypto currency that are for sale

There are about three(3) different entities on the blockchain and three(3) entities outside the blockchain

Exchange: This entity represents the exchange itself where diffrent users can trade cryptocurrencies

Token#1: This represents one of the token supported by the exchange

Token#2: This represents another token supported by the exchange

Fee Acount(0x...00A) : This represents an address used to save charges of transactions made by different users when they trade cyptocurrencies on the exchange.

User1(0x...001) : This represents a user on the exchange connected by their wallet address and has the ability to Deposit, withdraw or Order different tokens that are available on the exchange

User2(0x...002) : This represents another user on the exchange just as user1 they can as well Deposit, Withdraw, Buy or Sell available cryptocurrencies on the exchange

N.B The number of users that can operate on the exchange is unlimited, i.e it's not just limited to two(2) users as we have in the above image