EPIC: Core API

[aaronc]

Summary

Create a stable, standard API for building modules which is independent of the SDK and Tendermint versions, allowing for modules to be written which can target multiple implementations of these dependencies.

Problem Definition

See #12972.

Work Breakdown

On main

• Support core API genesis #14684
• Update core store iterator API to return errors #14698
• Update core API store support to return errors #14687
• Support core API service registration #14688
• Support core API begin/end blockers #14689
• Specify core API events #14685
• Support core API events #14690
• Support cosmos.msg.v1.signer as alternative to Msg.GetSigners #11275
• feat(core): specify event listener API #14735
• Add documentation about Core API [Docs]: core api adoption #17207
  • document migrations
• Manager methods should return errors instead of panicking #14836
• Specify gas service
• Specify block info/consensus service

Adaptors for older SDK versions

TODO

[tac0turtle]

closing this as docs will be completed and has its own issue