UX wise we prob need Don answer here, other than that it was discussed in Figma

@donouwens

Based on Andy's input shares are more accurate and actually accumulate to 100%. The initial idea from me was to show shares in a tooltip rather than showing both though.

Balances will still accumulate to 100%. And ratios should still be equally accurate (active_balance = active_shares*inaccurate_value; self_delegation_balance = self_delegation_shares*inaccurate_value).

@Andrew7234 how can balance inaccuracies occur? Is it just: if indexing is 10 days behind, both balances will be approximately 2.5% / 365 * 10 = 0.068% too low?

For calculating self delegations (or any user's staked balance with a validator) we end up rounding the balance to the nearest base unit. In practice this is a very small error since 1 rose = 10^9 base units, so it shouldn't make much of a difference to use shares/balance for percentage calculations.

I initially liked the idea of using shares since Nexus tracks those explicitly, and they don't change as often due to epoch staking rewards. But I agree that the 'rose balance' should take precedence over the 'shares'. I like Don's suggestion of showing the balance by default and displaying shares in the tooltip/hover, does that sound ok?