What is Graph Node (The Graph)?

The Graph blockchain protocol is designed to index and query data from blockchains, and Graph Node is the tool that enables this function. Graph Node is a Rust-based framework that acts as a master server to event source the Ethereum blockchain (the only blockchain currently supported) and the system's corresponding subgraphs. It deterministically updates a data store that can be queried and searched via the GraphQL endpoint. In essence, Graph Node is the main server that carries out the processes needed to obtain the answers to complex queries from blockchain databases.