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First, it should be noted that there is no such thing as a "plain Merkle Trie". The Merkle tree found in Bitcoin is not a radix tree (trie). The main reason Ethereum uses a Patricia Trie for transactions is simply uniformity. The current protocol specifies exactly one kind of tree-like data structure. Switching to a standard Merkle tree would require ...


3

I am not an expert, but let me share my understanding. Also, please check this question: Ethereum Merkle Patricia Trie and Hashes The trie is stored as key value pairs in levelDB. Each hash (256-bit integer) allows you to access a node. The value corresponds to a RLP encoded node (see Appendix D in yellow paper for different node types). If you want to ...


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There are 4 tries in total. See How many trie's does Ethereum have? The state trie is globally scoped, and contains a mapping of all known accounts to their state. Each node of the state trie represents an account. The data structure of each node contains details about the account balance, nonce, the code associated with the account, as well as the hash ...


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Ethereum also maintains latest state and transitions it when new blocks are received. Quorum is a fork of Go-Ethereum implementation and does exactly the same + adds private state on top of public state. LevelDB is used to store that state. Fabric and many of the others are benefiting from this design originally proposed in Ethereum papers.


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Your trie would start off with a branch node in this case. I have created this trie, it should be self-explanatory


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The storage trie is where the smart contract data is stored, note that this is not part of the block (only the root of the storage root is stored in the block-header) because this data can be retrieved from the transactions. The article posted below by @Gabriel actually has an explanation of ethereum world state, including the storage trie. See this also ...


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Confirmed by the man himself ... Ethereum used MPT for transactions instead of standard Merkle Trie so that they wouldn’t have to code two different types of Merkle Tries https://twitter.com/vitalikbuterin/status/1093421195834187776?s=21


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Instructions that store and retrieve data are: SLOAD: { execute: opSload, gasCost: gasSLoad, validateStack: makeStackFunc(1, 1), valid: true, }, SSTORE: { execute: opSstore, gasCost: gasSStore, validateStack: makeStackFunc(2, 0), valid: true, ...


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For state trie the paths represent the account addresses. What are the paths in the storage trie? Storage indices? That's correct, except that the addresses and indexes are hashed before they are stored in the trie. This is done for DoS protection: Why are keys hashed in Merkle Patricia Trie? When we instantiate two instances of this contract. Will they ...


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