Validators nodes consume bandwidth from verifiers. Validators are virtual nodes running either on the same machine as the verifiers or the leader, or on different machines altogether.  

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- Leader and Proof of History
- State
- Verifier and State Replication
- Validators

Components

Solana - A new architecture for a high performance blockchain

The leader is an elected proof of history generator, taking in arbitrary user transactions and converting them into a proof of history sequence of the transactions. This guarantees a unique global order in the system. Following each transaction batch, the leader outputs a signature of the state that is the result of running the transactions in that particular sequence 

Leader and Proof of History

State refers to a naïve hash table indexed by the users address. It contains the users address and the memory required for the computation. 

State

Verifier nodes replicate the blockchain state and provide high availability of the blockchain state. The replication target is selected through the consensus algorithm, ,and the validators in the consensus algorithm select and vote the proof of replication nodes they approve of.

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