Cross-node nonce coordination

[magik6k]

It would be great to have some kind of a mechanism to coordinate nonces between separate/redundant lotus nodes

This would most likely be extending the message signer to be able to coordinate between chain nodes

This could be done by:

• Making nodes talk to each other, and use some quorum based system to coordinate nonces
  • This is probably overkill
• Create a separate implementation backed by some standard database, enabled through the node config.
  • Not entirely sure what database - if it's easy enough to use some generic cross-database thing, maybe we want that.
  • Alternatively instead of chosing the database, point nodes at a signing api which would also handle nonces itself
  • This could be done by just extending the existing remote wallet backend, and adding a config knob to enable remote nonce assigning
  • Possibly the cleanest/most flexible approach?

[jennijuju]

We've decided to move away from this for 9130 atm