Amber is an update system with the ambition of updating all components running on a Fuchsia system whether that component is a kernel, a bootloader, a system service, an application, etc.
Many things are uncertain and/or undecided and this uncertainty is increased by the fluidity of other parts of the system with which Amber must interoperate. We do know that we are exploring using The Update Framework (TUF) as a basis for distribution and thus you will find many similarities between this repository and the Go implementation of TUF from https://github.com/flynn/go-tuf. Many thanks to the Flynn team, we hope to upstream any relevant changes!
Note: The go-tuf README can be found here.