How staking reward compounded?

[nishit9457]

Hi Team,

I want to show the accrued reward amount against any staking transaction for a specific time period/ epoch (old epoch also). So I am calculating this based on staking amount, APY and commission rate and other values for respective epochs.

I just want to confirm that how staking reward is compounded whether weekly or monthly or suggest any other way to calculate staking reward.

Thanks

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[emmazzz]

Hi @nishit9457,

Staking rewards are compounded each epoch (around 24 hour long) so they are compounded daily. We have this handy method that, given a stake object and staking pool, calculates the rewards it has accrued at a given epoch. This method may not provide entirely what you need, but should be a good reference for your calculation.

Hope this helps!

[nishit9457]

Thanks

[nishit9457]

Hi @emmazzz , I am doing calculation based on my understanding trying to represent below and in attached excel as well but some how reward is not matching with current reward. I have tried calculating it by considering epoch APYs from when it was staked to current with multiple scenarios.

Please let me know where am I doing wrong.

Address - 0xb4f42571101827758f55a9b998a1251892402fbd4dce90da3373625298091627
Validator - 0x9c7376a3f903cbe1f467a4edbefb54bb5a2f10886496c591ca955c22f0ae10c9
Stake Amount - 150,000
Active Epoch - 70

Delegated share % = delegatedStake / stakingPoolSuiBalance * 100. In our case it would be 150000 / 2739799 X 100 = 0.547%
Reward pool for Validator Stakely = 203163.7476
Validator commission = 5% (from commissionsRate – 500/100)
Validator will take 5% of 203163.7476 which is 10158.187 and rest 193005.55 would be available for distribution
Address share would be 193005.55 * 0.547% = 1055.74

Now given the reward was earned but not redeemed, this stake + reward would earn interest per the APY rates (5.38 for epoc 70).

Further compounding calculation explained in excel.

Please guide if anything wrong with this.

Interest Calculation 0xb4f42571101827758f55a9b998a1251892402fbd4dce90da3373625298091627.xlsx