Schemes
The Facilitator accepts a fixed-price exact payment and an experimental metered upto payment. Pick the one that matches how the price is known.
exact is the default path and the only upstream-standard scheme. The buyer authorizes one SEP-41 transfer(from, to, amount) for a fixed amount; the Facilitator cannot change its asset, recipient or amount without invalidating the authorization. Use it whenever the price is known before the request runs. It is available on both stellar:testnet and stellar:pubnet.