to calculate rewards

[xgracias]

how to calculate the rewards for validators. let's say i am a validator with minimum 20k $COREUM staked

[miladz68]

You should provide more context to further clarify the question, but I will answer it based on what I understood.

to get the yearly interest you should multiply the APR (you can get it from here https://www.mintscan.io/coreum), and multiply it by your stake. For example if you have 20k CORE and the current APR is 28.16%, then you will get 20,000 * 0.2816 = 5632 CORE after a year.

[xgracias]

You should provide more context to further clarify the question, but I will answer it based on what I understood.

to get the yearly interest you should multiply the APR (you can get it from here https://www.mintscan.io/coreum), and multiply it by your stake. For example if you have 20k CORE and the current APR is 28.16%, then you will get 20,000 * 0.2816 = 5632 CORE after a year.

that's cool. i am asking for validator reward. validators get reward from the tx they verified

[miladz68]

Validators get rewards from 2 sources, first inflation and second fees (which you are referring to).
what I described was the source of rewards from inflation which is the major part of the reward (more than 95% as of now). As for the fees, all fees are gathered from all the transactions in a block and are distributed to all the validators proportional to their stake. This is highly dependent on the number of transactions in a block.
The calculations I provided in the previous comment is the best estimate you can get and are highly accurate as of now.