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All internal trades are 0.25% all aggregated trades are 0.3%.

The new system I mentioned that's coming soon is going to make it even more efficient and cheaper than this in the long term :)

Great!

Add HBD and SWAP.HBD (if possible) - then it will be Golden :)

Thanks for the feedback. I'll definitely consider this.

That would definitely be cool, maybe list the expected fees on the front-end for full transparency. For as cheap as possible is a great goal but kinda vague ;-)