Push Publishing

[vyzo]

Implement the /mediachain/node/push protocol for accepting pushes from authorized peers. Semantics are those of an inverted merge: the source pushes statements, and the receiver merges them and requests objects by reusing the merge protocol implementation.

Closes #23

Implementation:

• [X] protobufs
• [X] receiver implementation
• [X] sender implementation
• [X] peer authorization/API for authorizing peers
• [X] namespace filtering in incoming stream

Also: changes mc/nat public ip detection service to ifconfig.co, as ifconfig.me appears to be busted.

Examples

• Pushing to a remote peer which has authorized us

  $ mcclient query "SELECT COUNT(*) FROM images.dpla"
  1000
  $ mcclient query -r QmSbgwkKxtrBFDoGGwoKqH7soYiL64xpMK5oEYdiRnQGJp "SELECT COUNT(*) FROM images.dpla"
  0
  $ curl -H "Content-Type: application/text" -d 'SELECT * FROM images.dpla' http://127.0.0.1:9002/push/QmSbgwkKxtrBFDoGGwoKqH7soYiL64xpMK5oEYdiRnQGJp
  1000
  1001
  $ mcclient query -r QmSbgwkKxtrBFDoGGwoKqH7soYiL64xpMK5oEYdiRnQGJp "SELECT COUNT(*) FROM images.dpla"
  1000

• Using the /auth api:

  
  $ mcclient id
  Peer ID: QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa
  Publisher ID: 4XTTMADSKQUN3jkeZngbtuE35w9y5YnDTicVTeeji7N2Npkey
  Info: vyzo testing

$ curl http://127.0.0.1:9002/auth {}

Authorize a peer (just self here)

$ curl -H "Content-Type: application/text" -d '' http://127.0.0.1:9002/auth/QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa OK $ curl http://127.0.0.1:9002/auth {"QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa":[""]} $ curl -H "Content-Type: application/text" -d ',foo.,bar.baz' http://127.0.0.1:9002/auth/QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa OK $ curl http://127.0.0.1:9002/auth {"QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa":["","foo.","bar.baz"]} $ curl http://127.0.0.1:9002/auth/QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa ,foo.,bar.baz

revoke authorization

$ curl -H "Content-Type: application/text" -d '' http://127.0.0.1:9002/auth/QmeBkfxcaBfA9pvzivRwhF2PM7sXpp4HHQbp7jfTkRCWEa OK $ curl http://127.0.0.1:9002/auth {}

[parkan]

Looking good so far