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The-Merge/running-a-validator.md
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## Nodes and validators
<br>
- the validator is responsible for creating a new block and sending it out to other nodes on the network.
- to participate as a validators, a user must deposit 32 ETH into the deposit contract and run 3 pieces of software: - an execution client - a consensus client - a validator
- once activated, validators receive new blocsk from peers - the txs delivered in the block are re-executed, and the block signature is checked
- the validator then sends a vote (attestation) in favor of that block across the network
- the timing of blocks is not determined by the mining difficult anymore, but it's fixed:
- slots (12 seconds)
- epochs (32 slots)
- in every slot, a committee of validators is randomly chosen, whose votes are used to determine the validity of the block being proposed
- the first block in each epoch is a checkpoint
<br>
### Setting a dedicated hardware