Calculate validator self delegation ratio about callisto HOT 3 CLOSED

@RiccardoM The self delegation ratio is the how much the validator has self delegated from it's own delegator account. We need to know the self delegation address which you can convert it from the desmosvaloper address back to desmos prefix. Currently I save the self delegation address once a new validator appears on the network. And then query the /staking/delegators/{delegatorAddr}/delegations/{validatorAddr} endpoint. For example,

http://lcd.morpheus.desmos.network:1317/staking/delegators/desmos1835rcx9ahn0a62pfpufsfj7jwv0vfsw47tk7tz/delegations/desmosvaloper1835rcx9ahn0a62pfpufsfj7jwv0vfsw4qx72ps

Then you can get the number of shares or tokens the delegation has.

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I am doing a message handler approach that catches the MsgDelegate, every change of delegation. If that is from the self delegation address then safe it to table
It can also store the delegation from other accounts. Do we interested in that?

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@HarleyAppleChoi I'm currently implemented what you have suggested inside #18 so don't bother going after that.

The way of handling MsgDelegate is perfect. Just make sure to also parse the genesis (you can do so by using a GenesisHandler so that you can get the starting data from when the chain spins up.

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