Skip to content

Latest commit

 

History

History
22 lines (18 loc) · 1.52 KB

State Root.md

File metadata and controls

22 lines (18 loc) · 1.52 KB
Raw

54 - State Root

stateRoot, transactionsRoot, and receiptsRoot are 256-bit hashes of the root nodes of modified Merkle-Patricia trees. The leaves of stateRoot are key-value pairs of all Ethereum address-account pairs, where each respective account consists of:

  1. nonce: A scalar value equal to the number of transactions sent from this address or, in the case of accounts with associated code, the number of contract-creations made by this account
  2. balance: A scalar value equal to the number of Wei owned by this address
  3. storageRoot: A 256-bit hash of the root node of a modified Merkle-Patricia tree that encodes the storage contents of the account (a mapping between 256-bit integer values), encoded into the trie as a mapping from the Keccak 256-bit hash of the 256-bit integer keys to the RLP-encoded 256-bit integer values.
  4. codeHash: The hash of the EVM code of this account—this is the code that gets executed should this address receive a message call; it is immutable and thus, unlike all other fields, cannot be changed after construction.

Slide Screenshot

054.jpg

Slide Text

  • Modified Merkle-Patricia Tree
  • Leaves -> Key-Value Pairs
  • Address -> Account
  • Account: Nonce, Balance, codeHash, storageRoot
  • Codehash/StorageRoot can be empty (EOA)
  • codehash -> Keccak256 of contract bytecode
  • storageRoot -> Root hash of merkle-patricia tree -> leaves represent Account Storage