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🌍 Nodes

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  • Nodes are the computers that are connected to the blockchain network.
  • Peer-to-peer network of computer named as Ethereum Nodes.
  • Anyone can run Ethereum node on its laptop or desktop.
  • Ethereum nodes runs on an Ethereum client such as geth. The geth client is written in the Go programming language.

EVM (Ethereum Virtual Machine)​

  • Runs as VM(virtual machine) named as EVM and runs application (EVM Bytecode) based on global consensus system (Proof of work & Proof of stake).
  • This EVM has its microkernal, stack, memory and storage.
  • EVM is a sandboxed runtime environment that executes the EVM Bytecode.
  • New clients for Etehreum 2.0 run the becaon chain and shard chain, and Supported Proof of Stake consensus mechanism.
  • Old clients for Ethereum 1.0 run the Ethereum mainnet and support Proof of Work consensus mechanism.
  • Many Different Ethereum Networks;
    1. Main Net,
    2. Test Nets (Rinkeby, Ropsten, Goerli,Koven)
    3. Private Networks (Ganache, Quorum, Hyperledger Besu)

Types of Nodes​

  1. Full Node
  2. Light Node
  3. Archive Node

Full Node​

  • Full Node stores locally copy of complete blockchain.
  • Full Node is a computer that fully validates transactions and blocks.
  • Full Node is a computer that fully enforces all the rules of the Ethereum network.

Advantages of Full Node

  • Full Node provides the highest level of security.
  • Full Node provides the highest level of privacy.
  • Full Node provides the highest level of decentralization.
  • Full Node provides the highest level of trustlessness.
  • Full Node provides the highest level of censorship resistance.

Drawbacks of Full Node

  • Full Node requires a lot of storage space.
  • Full Node requires a lot of bandwidth.
  • Full Node requires a lot of processing power.
  • Full Node requires a lot of time to sync with the network.
  • Full Node requires a lot of time to validate transactions and blocks.

Light Node​

  • Light Node stores only the block headers.
  • Light Node is a computer that does not validate transactions and blocks.
  • Light Node is a computer that does not enforce all the rules of the Ethereum network.

Advantages of Light Node

  • Light Node requires less storage space.
  • Light Node requires less bandwidth.
  • Light Node requires less processing power.
  • Light Node requires less time to sync with the network.
  • Light Node requires less time to validate transactions and blocks.

Drawbacks of Light Node

  • Light Node provides a lower level of security.
  • Light Node provides a lower level of privacy.
  • Light Node provides a lower level of decentralization.
  • Light Node provides a lower level of trustlessness.
  • Light Node provides a lower level of censorship resistance.

Archive Node (History)​

  • Archive Node All data in full node & built in archive.
  • Archive Node stores locally copy of complete blockchain and all the state data.
  • Archive Node is a computer that fully validates transactions and blocks.
  • Archive Node is a computer that fully enforces all the rules of the Ethereum network.

Advantages of Archive Node

  • Archive Node provides the highest level of security.
  • Archive Node provides the highest level of privacy.
  • Archive Node provides the highest level of decentralization.
  • Archive Node provides the highest level of trustlessness.
  • Archive Node provides the highest level of censorship resistance.

Drawbacks of Archive Node

  • Archive Node requires a lot of storage space.
  • Archive Node requires a lot of bandwidth.
  • Archive Node requires a lot of processing power.
  • Archive Node requires a lot of time to sync with the network.
  • Archive Node requires a lot of time to validate transactions and blocks.

Connect with UI​

  • Ethereum can be connected with UI (User Interface) using Web3.js.
  • Web3.js is a JavaScript library that allows you to interact with the Ethereum blockchain.
  • Web3.js allows you to send transactions, deploy smart contracts, and read data from the Ethereum blockchain.
  • Web3.js allows you to connect to an Ethereum node using HTTP, WebSocket, or IPC (Inter-Process Communication).
  • Web3.js allows you to connect to an Ethereum node running on your local machine or on a remote server.
  • MetaMask Crypto Wallet Extension is a browser extension that allows you to connect to the Ethereum blockchain using Web3.js.
  • Wallet for dapps application through money transfer, voting, ownership, etc.