Understanding Subgraph Manifest: Concept and Structure

A Subgraph Manifest is a file that governs how specific data is mapped from the Ethereum network to The Graph. In YAML format, the Subgraph Manifest contains important information such as the subgraph name, description, and data source that defines the participating smart contracts. This serves as a structural guide to defining the entities, relationships, and indices needed to create graphs in The Graph.

Function of Subgraph Manifest

• Defining Data Structure: The Subgraph Manifest defines the data structure to be indexed in the graph, including entities, relationships, and how to index.
• Provide Context to Users: Descriptions in the Subgraph Manifest provide context to users about what the subgraph is indexing, improving their understanding.
• Data Source Mapping: By including data source IDs, Subgraph Manifest guides the mapping process between on-chain events and fields on entities in The Graph.

Example of Subgraph Manifest

Let's look at a simple example of a Subgraph Manifest

In this example, the subgraph named "MyEthereumSubgraph" has two data sources that define the Ethereum smart contract that contributes the data. The description provides an overview of the subgraph's purpose.

Subgraph Manifest is a critical guide to building decentralized data structures on The Graph. By providing clear definitions of entities, relationships, and data sources, Subgraph Manifest plays an important role in simplifying blockchain data indexing.

The simple example above reflects how Subgraph Manifest drives this process, opening up new opportunities to extract insights from the Ethereum network.

Read More:

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