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Ethereum: basics 1

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Basics: Epoch 10: The World State

World State

The World State of Ethereum is not stored in the block chain. It is a backend database implemented by the node, with a mathematical structure known as Merkle Patricia tree. In this DB is stored the mapping between all the 160 bit addresses and the relative accounts.
The node should mantain updated this DB.
Every account in the world state has these properties:

  • nonce the number of transactions sent by this account
  • balance the wei owned by the account
  • storageRoot (can be empty) the hash of the root node containing the storage data of this account
  • codeHash (can be empty) the hash containing the Ethereum Virtual Machine code of this account

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