Substrate

Intro to Substrate

One node needs
- Database
  - Block storage
- P2P Network
  - JsonRPC
    - Submit transaction
    - Get data about events that happen on-chain
    - Read some of the storage on the chain
  - libp2p
    - one node in the network connects with another
- Block Authoring
- Fork Choice Rules
- Transaction Handling
  - Tx Pool
- State Transition Function ( Runtime )
  - Compiled down to wasm
  - Runs on all platforms
  - Store wasm on a chain which allows forkless runtime update
  - Upgrade blockchain without a hard fork, putting runtime logic there
  - Sudo pallet for testing
- Consensus
  - Authoring
    - PoW
    - Aura
    - Babe
  - Finality
    - Grandpa
- Parachain