We are looking to allow our users to buy/sell USDT-ERC.
I am confused about how this process works. Initially thought they could just allow them to buy/sell directly using web3 and the USDT ERC20 contract. It seems you can't do this as there is no function to buy.
Now I am thinking we need to buy USDT-ERC into our own master ETH address and then use that mater address to allow our users to buy/sell. Would this be the correct way?
How can we buy USDT-ERC into our own master ETH address?