prod, api, main, swarm: add fallback content recovery publisher

mortelli commented 4 years ago

WIP for #2182

This PR:

adds the RecoveryPublisher config value and SwarmRecoveryPublisherFlag CLI flag to set a fallback content recovery publisher
modifies the recovery hook constructor to use the RecoveryPublisher value
injects the manifest hash value into the context for fallback content recovery when attempting to get a chunk (the hash will be used to create a fallback recovery feed topic)
updates the getPinners func to query the fallback recovery feed if there is some failure with the regular recovery feed
extracts the queryRecoveryFeed, getFeedTopicAndUser, getFeedContent and publisherToAddress funcs
updates prod tests to use fallback recovery publishers

mortelli commented 4 years ago

put on hold due to #2193

mortelli commented 4 years ago

Closing this, as #2182 has been closed.

ethersphere / swarm