A Star Ship sets its path to some planet in the Alpha Centauri
They use the common blockchain currency of earth some form of derivative from bitcoin that has taken over the world in a near or faraway future.
Once they return to earth, what would happen to all the inner ship transactions since the nodes within the ship and on earth would not be able to coordinate if they are more than 10 light minutes away?
Please assume that upon the StarShip return, earth is still alive and blockchain currency protocol has not been altered.
EDIT: Alpha Centauri is a star system composed of 3 stars... wikipedia