This is where we bring the previous lessons and put it in the context of where those concepts fit within Ethereum

Concept | Concept Map

• Intro to Wallets
  • ENS
• Intro to Metamask
• Ethereum Clients and relating back to Client & Server Architecture
• Cryptography in the context of Ethereum
• Intro to Smart Contracts
• Blocks
• 12-25 transactions per second
• 10-19 second block time

Blocks

A valid block hash has:

• Merkle root
  • A hash of all included transactions in the block that’s contained within a Merkle tree data structure
• Nonce
  • An arbitrary alphanumeric combo that produces a valid hash that meets the current difficulty target
    • In Pow, blockchains adjust difficulty of guessing a nonce to target a certain frequency of blocks (Ex: every 10 minutes for Bitcoin)
    • In PoS, nonces are easier to generate
• Block metadata
  • Varies across blockchains but examples are
    • Software version
    • Timestamp
    • Mining difficulty
• Previous block hash
  • Valid block hash from previously validated block
    • Crytopgraphically link them together in a chain to maintain the chronological order of the blockchain

I have this Intro to Blockchain talk that I can repurpose here where I can get into

• Bitcoin
• What the fuck is the blockchain in simple terms
  • Computer Science | Database concept: Database replication but an extreme version of it