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This question is related to my previous question: When are the snapshots for the active stake in an epoch taken?

The active stake of a pool is used to calculate the rewards. What kind of system calculates the active stake of a stake pool? Is this done by the Cardano nodes or by the stake pools themselves or some other part of the Cardano ecosystem?

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Data captured by the snapshot is stored on-chain as a part of the ledger state, so all fully synchronized cardano-node instances have access to it. So, for example, when you run the cardano-cli query stake-distribution --mainnet --out-file stakeDist.out command the cardano-cli queries and outputs the current active stake data for each pool.

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From my understanding, the active stake is calculated as a sum of all coins that were delegated to a particular pool. You can take a look here. enter image description here

enter image description here

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  • So is this part of the nodes? Or is this shelly-spec-ledger part of some other system running in parallel? And if it's part of the nodes, which nodes are running this code? And who initiates the transactions/reward payouts? – eddex Jun 10 at 5:12

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