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Jan 15, 2024
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Update accounts.mdx #135

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6 changes: 3 additions & 3 deletions src/content/docs/en/technology/chain/accounts.mdx
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Expand Up @@ -16,14 +16,14 @@ Scroll stores additional information of the contract bytecode in the account to
The account in Scroll contains the following fields:

- `nonce`: A counter that indicates the number of transactions sent by the sender.
- `balance`: The balance of `ETH` token in the account balance (unit in wei).
- `balance`: The balance of `ETH` token in the account (unit in wei).
- `storageRoot`: The root hash of the storage trie. Since Scroll uses the [zkTrie](/technology/sequencer/zktrie) for the storage trie, the `storageRoot` stores the Poseidon hash digest in a 256-bit integer.
- `codeHash`: The Keccak hash digest of the contract bytecode.
- `PoseidonCodeHash` (**new field**): The Poseidon hash digest of the contract bytecode in a 256-bit integer.
- `CodeSize` (**new field**): The number of bytes in the contract bytecode.
- `CodeSize` (**new field**): The size of the contract bytecode in bytes.

## State

The state of a blockchain is a collection of account data. The _state trie_ encodes account data and their corresponding addresses to a [Merkle tree](https://en.wikipedia.org/wiki/Merkle_tree) data structure. The root of tree, or the state of the blockchain, is a cryptographic digest of all the account data contained in the tree.

Ethereum uses a data structure called [Patricia Merkle Trie](https://ethereum.org/en/developers/docs/data-structures-and-encoding/patricia-merkle-trie/) for both the state trie and the storage trie that stores the key-value entries stored in a smart contract. In Scroll, we replace the Patricia Merkle Trie by a more zk-friendly data structure, called zkTrie, for both state trie and storage trie. In the high level, the zkTrie data structure is a sparse binary Merkle tree with the [Poseidon hash](https://eprint.iacr.org/2019/458.pdf), a zk-friendly hash function. The [zkTrie](/technology/sequencer/zktrie) document describes more details about this data structure.
Ethereum uses a data structure called [Patricia Merkle Trie](https://ethereum.org/en/developers/docs/data-structures-and-encoding/patricia-merkle-trie/) for both the state trie and the storage trie that stores the key-value entries stored in a smart contract. In Scroll, we replace the Patricia Merkle Trie by a more zk-friendly data structure, called zkTrie, for both state trie and storage trie. At a high level, the zkTrie data structure is a sparse binary Merkle tree with the [Poseidon hash](https://eprint.iacr.org/2019/458.pdf), a zk-friendly hash function. The [zkTrie](/technology/sequencer/zktrie) document describes more details about this data structure.