Global pinning

[Eknir]

Story

• As the uploader of Swarm content, I want that the pinners of my file are known, such that they can be contacted when one or more of my chunks are unavailable in the network.

• As a user of Swarm who is downloading a file that is pinned and from which a chunk is lost, I want to reach out to the pinner and send him a message, such that the chunk is repaired and I can download the file.

Background

• Pinners are announced via a single-owner chunk where the owner is the uploader and the identifier the content address of the pinned chunk (or root chunk of a collection of chunks).
• POC code in the Swarm repo is available and implemented by @santicomp2014 and @mortelli

When a pinned content disappears from the network, it is not available to the downloaders. This Epic is about repairing the chunks which are missing.

Phases

• Phase 0, Port from Swarm Global Pinning Phase 0 #440
• Phase 1, Full integration with BEE Global Pinning Phase 1 #441
• Phase 2, Integration Tests and Tweaks Global Pinning Phase 2 #442