Perusing Battle Arts
The two shook hands, sealing the terms of the deal. While John did not get anything in writing, this was a sort of test for the Mystic Trade Hall from him as well. He had given them an incredibly small portion of his palace realm tea leaves, which he could grow an infinite amount.
If Caz honored their verbal agreement and kept his word, the Mystic Trade Hall would prove themselves worthy of John doing his business there, and would get all his future trade dealings. However, if Caz decided to renege on the agreement and keep the proceeds for the Mystic Trade Hall, then John would see right through how they did business, and find a different trade guild to do business with.
If there was one constant in the martial world, it was that there was always another trade hall looking to do business, as money was everything.