FIP 44 - Standard Authentication Method for Actors

[lemmih]

Issue summary

• Are there any changes to the actor data structures that we need to be aware of?
• Are there any changes to the network protocol?
• Are there any changes to node behavior (eg. changes in block validation criteria, random number generation, etc)?
• Are there any new magic numbers?

Other information and links

https://github.com/filecoin-project/FIPs/blob/master/FIPS/fip-0044.md

[LesnyRumcajs]

It doesn't seem we would need to change anything, except bumping the builtin-actors version.

It may be tempting to use this new method of the Account actor and not have our implementation for verifying message signatures. It's something to consider (keeping in mind a potential FVM overhead), but not a blocker.

Related PR: filecoin-project/builtin-actors#502