notes - A Journey Through Phase 2 of Ethereum 2.0

Notes from https://medium.com/@william.j.villanueva/a-journey-through-phase-2-of-ethereum-2-0-c7a2397a36cb 

# ETH2.0 has 3 phrases:
 - 0 = beacon chain - core pieces, networking, signature schemes, randomness 
 - 1 = mechanics of independently operating 1024 shard chains
 - 2 = execution engine, trannsaction through space, account model  ### = life of ETH2.0 - opns up state execution and computation 
 
 # Beacon chain = Shard chain 
 - ability to use ether with contract, wallets, applicationa
 - has native ether = deposit 32 ETH - became validator / staker
 - doesn’t have a concept of native ether
 - stores a list of reciepts in every block 
 
# Shard chains + state execution fuctions = reflections and integrations of the framework defined in the Beacon Chain contract 
  - shard chains don’t need state
  
  
 # Road from ETH 1.0 to ETH 2.0 - BLS Signature schema (application layner not consensus layer)
 ## 1.0 -> Beacon Chain contract 0 -> Shard number (example - 5) <- shard chain 
 - Have ETH on 1.0 chain
 - move it to Beacon chain contract with validator / staking account 
 - deposit to shard
 - = create account on shard chain by adding another function to Beacon chain contract = reduce balance in your (our) account >
 - = increase balance in recieving account <
 
 # Notes 
 - to make transaction  happen you need to provide Merkle branches for the state values of the transaction 
 - no big database storage is needed on active nodes 
 - nodes can use withness data in every transaction as database 
 - storage + storage fees can be removed from core protocol 
 - core protocol needs merkle hash/ compression value 
 - with cross shard transactions you don’t need to wait epoch period - 6 mins to make transaction happen
 -> cross chain can combine transaction on multiple shards