In Norse mythology, Ladon is the dragon who guards the golden apples of immortality, which keep the gods youthful.
In the systems of software that is Yggdrasil, Par keeps track of goods as they move through the courier system & Ladon aids people who run holding locations to manage their resources.
Trust
The trust in the system is grounded in bonds. A parcel is entered into the system with a given insurance value & in order for a courier or holder to take possession, they must stake a bond equal to that amount which is forfeit if a review by their peers of the footage they collected while attempting to discharge their duties finds their performance lacking.