Get epoch rewards for a block from node.

[shaswatsaloni]

Hi Team,

I have a rosetta as well as archival Celo Node. There i am getting the normal transactions with the query:

{
"method": "eth_getBlockByNumber",
"params": [
"0x556E00", //blocknumber
true
],
"id": 1,
"jsonrpc": "2.0"
}

But here the epoch transactions are not present, by which i want to have the voting rewards.

But if i want to query the rosetta or archival node for this epoch transactions/rewards, how would i get that?

@eelanagaraj could you please help us here.

Thanks,
Saloni

[carterqw2]

Hey @shaswatsaloni, could you please check out this repo for an explainer on how epoch transactions work and how to fetch them.

[shaswatsaloni]

Hey @carterqw2 , that repo was really helpful, thanks.

One more query here, i want to get the epoch rewards for the address : 0x9efecf85d7e668c0c3c7a778a1164b064234f96d

So, here i can see it has epoch transactions in block: [5598720]

the explorer link : https://explorer.celo.org/mainnet/address/0x9efeCf85d7E668c0C3c7a778A1164b064234f96d/epoch-transactions

When i am calling the POST method for this particular block:

{
"method": "eth_getLogs",
"params": [
{
"fromBlock": "0x556E00",
"toBlock": "0x556E00"
}
],
"id": 1,
"jsonrpc": "2.0"
}

I am not able to find the particular address (0x9efecf85d7e668c0c3c7a778a1164b064234f96d) in the response JSON.

how would i calculate and get the epoch rewards here?

Thanks,
Saloni

[carterqw2]

Hi @shaswatsaloni! You're trying to get individual voter rewards, please refer to this section of the explainer for more details. Celo Explorer has to perform additional calculations to be able to display individual voter rewards that are not directly available through logs. I hope that helps.

[shaswatsaloni]

Okay, understood.

So, there is no simple way that we an fetch epoch transactions/ voting rewards for a celo address.

And, is there any way we can get the epoch transactions for an address instead of a block.

Thanks,
Saloni

[carterqw2]

We provide an RPC API in Celo Explorer, if that works for you (search for getvoterrewards).

https://explorer.celo.org/mainnet/api?module=epoch&action=getvoterrewards&voterAddress=0x9efecf85d7e668c0c3c7a778a1164b064234f96d

curl -X GET "https://explorer.celo.org/mainnet/api?module=epoch&action=getvoterrewards&voterAddress=0x9efecf85d7e668c0c3c7a778a1164b064234f96d" -H "accept: application/json"

[shaswatsaloni]

Yes, this i have. I just wanted to query my node if its at all possible?

[carterqw2]

Yeah, unfortunately, there is no easy way, you'd have to fetch epoch blocks and perform calculations described in the explainer manually.

[shaswatsaloni]

Hi @carterqw2 , from this RPCAPI https://explorer.celo.org/mainnet/api?module=epoch&action=getvoterrewards&voterAddress=0x9efecf85d7e668c0c3c7a778a1164b064234f96d, we are getting the rewards based on the address.
Is there a way, we can get it for a block? And, is there any limitation for the number of requests we make for this API?

Thanks,
Saloni.

[carterqw2]

Do I understand you correctly that you want to fetch all voter rewards split by account for a given epoch block? If so, then we don't have such an API.

In theory, you could implement something like:

1. Get all the ValidatorGroupVoteActivated events to get all the unique voters accounts.
2. For all the voter addresses, get their rewards using the RPC API endpoint above.

It would be a bit chatty but would work. I'm not sure what the current rate limit values are but please avoid abusing the system.