Get a non-binding estimate for a swap on the CFX network.

Given a source currency, target currency, and source amount, this returns the amount remaining after fees, the projected target amount, and an itemized fee breakdown. Fees are deducted from the source side.

This endpoint is purely for previewing swap amounts and fees — it does not reserve a price, persist anything, or expire. To execute a swap, create a binding quote (Create Quote) and accept it.