Charters
Write the terms. Fund them. Wait at the gate.
A charter is a written put: the advance is the strike, the toll is the premium, the term is the term. The dollars sit in the keep so a draw is atomic, and come back the moment you strike the charter.
A new charter
Your charters
Connect to see the charters you have written.
Striking a charter closes it and returns what nobody drew. Holds already opened against it are untouched; they run to their own day.