FIP 47 - Proof Expiration & PoRep Security Policy

[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?

Note: This FIP may or may not be in NV17.

Other information and links

https://github.com/filecoin-project/FIPs/blob/master/FIPS/fip-0047.md