Subgraph Manifest

A subgraph manifest is the main configuration file of a subgraph, an indexing project built for The Graph, a protocol that organizes blockchain data so applications can query it quickly. Written in YAML and normally called subgraph.yaml, the manifest lists the data sources to follow, such as the network, the addresses of the smart contracts, their interface definitions and the block from which indexing should start. It names the contract events and function calls of interest and points to handler functions, the mapping code, that convert each event into structured records defined in a separate schema file. When a developer deploys the subgraph, indexers read the manifest to know what to process. Developers then query the results through a GraphQL API instead of scanning the chain themselves, which is how many decentralized applications display balances and trading history.