Goals

Add a retrieve-piece command to boost CLI

How

Command syntax:

boost retrieve [command options] [pieceCID] [outputFile]

OPTIONS:
   --providers value - list of provider addresses, as string, seperated by comma

For now --providers is required (future version will scan the chain)

Implementation:

• query the chain to convert provider addresses to peer ids
• send query ask v2 piece query -- if not connection on v2, assume we skip the provider
• if v2 responds with no piece protocols (will happen if no HTTP support), skip the provider
• collect successful queries, and attempt HTTP piece retrieval and write to specified file if successful