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목록Ethereum (16)
ReasonJun
Ethereum uses a Key-Value based DB (leveldb). By using the hashed value of the address as the key and using the address as the path as shown in the picture on the below, you can find out the state value of the account. Ethereum Tries The Tries used in Ethereum are Storage Trie, State Trie, Transaction Trie, and Receipts Trie. Among these, the Root Hash value stored in the Block Header is State T..
The abi.encodePacked() function is a built-in Solidity function that is used to encode multiple values into a single byte array. The function takes any number of arguments and concatenates them into a single byte array. The abi.encodePacked() function is typically used to encode data that is going to be passed to a contract function. For example, the following code would encode the string "Hello..
ERC-1155 is a token standard for representing both fungible and non-fungible tokens (NFTs) on the Ethereum blockchain. It is a single standard that can be used to represent a wide variety of assets, such as game items, collectibles, and even real-world assets. ERC-1155 tokens are identified by two values: a token ID and a balance. The token ID is a unique identifier for the type of token, while ..
ERC-721 is a standard for non-fungible tokens (NFTs) on the Ethereum blockchain. NFTs are unique digital assets that cannot be replicated or replaced. This is in contrast to fungible tokens, such as ERC-20 tokens, which are interchangeable and can be replaced with one another. ERC-721 tokens are often used to represent digital collectibles, such as artwork, music, or game items. They can also be..
Ethereum-Waffle is a testing framework for Ethereum smart contracts. It is designed to be easy to use and to provide a comprehensive set of features for testing smart contracts. Waffle provides the following features: A simple and intuitive API for writing tests Support for all of the Solidity features A built-in mocking framework A built-in snapshotting framework A built-in coverage reporting f..
ERC-20 is a technical standard for fungible tokens on the Ethereum blockchain. Fungible tokens are interchangeable with each other, meaning that one token is worth the same as any other token of the same type. This is in contrast to non-fungible tokens (NFTs), which are unique and cannot be replaced. The ERC-20 standard defines a set of rules that all ERC-20 tokens must follow. These rules inclu..