Celestia - MsgDelegate does not auto-withdraw reward since v4

[chliddle]

https://github.com/celestiaorg/CIPs/blob/main/cips/cip-030.md?ref=blog.celestia.org

Currently, when delegators modify their staking positions (e.g., redelegate or undelegate), the distribution module automatically claims all accrued staking rewards. This CIP proposes removing that automatic functionality, thereby allowing users to intentionally choose when to claim their rewards. Specifically, the distribution module will no longer auto-claim rewards on delegation-share changes. Instead, it will store the accrued rewards until a user explicitly calls MsgWithdrawDelegatorReward. This avoids unintended reward-claiming events that can trigger immediate tax or regulatory obligations.

To support celestia >=v4, the backend will now require authz tx for both MsgWithdrawDelegatorReward before the MsgDelegate tx to ensure accrued rewards are claimed before restaking.

Corresponding UI issue: #152

[tombeynon]

Thank you for raising this @chliddle - you're right about the impact and solution.

Unfortunately this requires quite a few changes which I don't have capacity for right now. If anyone wants to raise a PR that would be super helpful, otherwise I'll take a look in the coming weeks/months.

In the meantime, I would advise celestia validators NOT to run REStake. It can cause you to delegate your users balance rather than their rewards (as it will try to delegate but no rewards will be claimed).