Store canonical ICA channel IDs in host zone struct

[sampocs]

Background

Stride has 4 main ICA channels (delegation, redemption, withdrawal, fee). However, the packets along those channels have short timeouts often go unrelayed causing channel closures. Each time a channel is closed, we need to open a new one. As a result, it's tough to keep track of this canonical channel. An easy solution is to store the channel ID on the host zone struct which would allow us to easily query it from the rest endpoint.

Suggested Design

• Add the following attributes to the host zone struct
  • delegation_channel_id
  • withdrawal_channel_id
  • redemption_channel_id
  • fee_channel_id
• In stakeibc OnChanOpenAck, set the channel ID as a new ICA channel is created
• Add upgrade handler to set each channel ID on existing host zones by looking up in the channel and ICA stores