I've been working on this already for a week or two, so this log is to update on where this project is right now

Essentially, trading is working, and the UI isn't beautiful but it is user-friendly.  Everything is still on the Ropsten Testnet.  All the tokens are using a fixed price system right now, so it wouldn't work for any non-stable tokens yet.

Currently I am working on an Ethereum smart contract capable of processing orders, thus allowing the token price to fluctuate.

Important thing: "latching contracts"

This is a term I created for contracts that 'latch' to a certain token to enable trading.

Trading protocols for smart contracts

There are several trading protocols right now:

• "legacy"
• "Tr100"
• "Tr100b"
• "Tr100b-compat"

"legacy" and "Tr100" are considered obsolete - not going over them.

Tr100b and Tr100b-compat

Contracts that use either of these protocols can:

• tell you if a certain amount of tokens can be traded
• tell you what the fee is, or zero if none
• trade (obviously)
• tell you what the cost of a buy or revenue of a sale would be
• tell you the total token supply
• tell you the token balance of an address

The difference between them is that Tr100-compat is designed for latching contracts, and can also tell you which contract has been latched.

That is the state of the project thus far!