chore: drop Node.js 20 support, require Node 22+

Node 20 reached EOL on 2026-04-30. Bump the declared minimum to Node 22
(22.11.0 for the CLI package), replace Node 20 with Node 22 in the
single-version CI jobs, and shift the CLI test matrix from [20, 22] to
[22, 24] so what we test matches what publish.yml already ships on.

Author: lutter

.changeset/drop-node-20.md

@@ -0,0 +1,7 @@
+---
+'@graphprotocol/graph-cli': minor
+---
+
+Drop support for Node.js 20 (end-of-life 2026-04-30). The minimum supported
+Node.js version is now 22.11.0 (Node 22 LTS). CI now tests on Node 22 and 24;
+released binaries continue to be built on Node 24.

.github/actions/setup-node/action.yml

@@ -7,7 +7,7 @@ inputs:
   nodeVersion:
     description: Node.js version to use
     required: true
-    default: '20'
+    default: '22'
   workingDirectory:
     description: Working directory
     required: false

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: ./.github/actions/setup-node
         name: Setup Env
         with:
-          nodeVersion: 20
+          nodeVersion: 22
           packageManager: pnpm
           packageManagerVersion: 9
 
@@ -38,7 +38,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [20, 22]
+        node-version: [22, 24]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v5
@@ -80,7 +80,7 @@ jobs:
       - uses: ./.github/actions/setup-node
         name: Setup Env
         with:
-          nodeVersion: 20
+          nodeVersion: 22
           packageManager: pnpm
           packageManagerVersion: 9
 
@@ -110,7 +110,7 @@ jobs:
       - uses: ./.github/actions/setup-node
         name: Setup Env
         with:
-          nodeVersion: 20
+          nodeVersion: 22
           packageManager: pnpm
           packageManagerVersion: 9
 

README.md

@@ -21,7 +21,7 @@ all the communications.
 To run this project locally:
 
 1. Clone the repository
-2. Make sure you have [Node.js](https://nodejs.org/en) `>=20.x` installed
+2. Make sure you have [Node.js](https://nodejs.org/en) `>=22.x` installed
 3. Make sure you have [`pnpm` installed](https://pnpm.io/installation)
 4. Run `pnpm install` to install dependencies
 5. Run `pnpm build` to build the packages

examples/ethereum-basic-event-handlers/hardhat/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM node:22-alpine
 
 COPY . /usr/src/app
 

package.json

@@ -12,7 +12,7 @@
   "license": "(Apache-2.0 OR MIT)",
   "private": true,
   "engines": {
-    "node": ">=20.0.0",
+    "node": ">=22.0.0",
     "pnpm": "9"
   },
   "scripts": {

packages/cli/package.json

@@ -10,7 +10,7 @@
   },
   "license": "(Apache-2.0 OR MIT)",
   "engines": {
-    "node": ">=20.18.1"
+    "node": ">=22.11.0"
   },
   "bin": {
     "graph": "bin/run.js"