Graph Node Dev Mode

Overview

Graph Node Developer Mode (GND) is a developer-friendly Graph Node runner designed for local Subgraph development. It simplifies setup by removing the need for IPFS and offering smart defaults like automatic database handling (on Unix) and live Subgraph redeployment.

Prerequisites

PostgreSQL installed and running
Access to an Ethereum RPC endpoint (e.g., Anvil, Hardhat)

Step 1. Set Up

Install gnd using the Graph CLI:

1graph node install

This installs the latest gnd binary to:

Unix: ~/.local/bin
Windows: %USERPROFILE%\gnd\bin

Ensure this directory is in your system PATH:

1gnd --version

Step 2. Usage

Run gnd inside your Subgraph project directory.

Minimal Usage (Unix)

1gnd --ethereum-rpc mainnet:http://localhost:<PORT>

With Hot-Reloading

1gnd --ethereum-rpc mainnet:http://localhost:<PORT> --watch

--watch enables automatic Subgraph redeploys when the build directory changes

Windows (Postgres URL required)

1gnd --ethereum-rpc mainnet:http://localhost:<PORT> --postgres-url "postgre2sql://graph:yourpassword@localhost:5432/graph-node"

Step 3. PostgreSQL Setup on Windows

After installing PostgreSQL, follow these steps:

1. Launch `psql` as SUPERUSER

1psql -U postgres

Replace postgres with your superuser name if different.

2. Run the following commands

1create user graph with password 'yourpassword';2create database "graph-node" with owner=graph template=template0 encodi3ng='UTF8' locale='C';4\c graph-node5create extension pg_trgm;6create extension btree_gist;7create extension postgres_fdw;8grant usage on foreign data wrapper postgres_fdw to graph;

Use this URL when running gnd:

1--postgres-url "postgresql://graph:yourpassword@localhost:5432/graph-nod2e"

3. Flags & Options

Flag	Description
`--watch`	(Optional) Watches the Subgraph build directory and redeploys on changes.
`--manifests`	Path(s) to manifest files. Format: `[BUILD_DIR:]/manifest`. Default: `./subgraph.yaml`.
`--sources`	Source manifest aliases for resolving shared data sources.
`--database-dir`	Directory to store temporary Postgres instance (Unix only). Default: `./build`.
`--postgres-url`	URL for PostgreSQL DB. Required on Windows.
`--ethereum-rpc`	Format: `network[:capabilities]:URL`. Required.
`--ipfs`	IPFS endpoint(s). Default: `https://api.thegraph.com/ipfs`.

Step 4. Running a Subgraph

To run a Subgraph:

1. Navigate to your Subgraph directory

1cd path/to/your-subgraph

2. Start gnd with an Ethereum RPC

1gnd --ethereum-rpc mainnet:http://localhost:<PORT>

This will build and start the Subgraph.

3. Query your Subgraph at

1http://localhost:8000/subgraphs/name/subgraph-0/

Notes

On Unix, if -postgres-url is not provided, gnd automatically starts a temporary Postgres instance in the -database-dir folder (default: ./build).
On Windows, you must provide a valid -postgres-url.
IPFS is optional; gnd uses https://api.thegraph.com/ipfs by default.