feat: add support for Node.js v22

This commit adds Node.js v22 support by including it in our testing
matrices, including it in the supported version list and updating the
docs to reflect the v22 support.

Node.js v22 was not added to the @types/node CI check. As of today
(13th June 2024), there is no `@types/node@22`. I suspect
this will be added once node v22 is out of `Current` status.

Resolves #5388.

Author: kanej

.github/workflows/hardhat-chai-matchers-ci.yml

@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-core-ci.yml

@@ -118,6 +118,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # TODO: Currently there is no @types/node for Node 22,
+        # include it when it is available.
         node: [18, 20]
     steps:
       - uses: actions/checkout@v4

.github/workflows/hardhat-ethers-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-foundry-ci.yml

@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-ledger-ci.yml

@@ -71,7 +71,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-network-helpers-ci.yml

@@ -74,7 +74,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-network-tracing-all-solc-versions.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-shorthand-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-solhint-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-solpp-ci.yml

@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-toolbox-ci.yml

@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-truffle4-ci.yml

@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-truffle5-ci.yml

@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-verify-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-viem-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-vyper-ci.yml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-web3-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-web3-legacy-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

.github/workflows/hardhat-web3-v4-ci.yml

@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20]
+        node: [18, 20, 22]
     steps:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2

docs/src/content/tutorial/setting-up-the-environment.md

@@ -21,7 +21,7 @@ Copy and paste these commands in a terminal:
 ```
 sudo apt update
 sudo apt install curl git
-curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
+curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash -
 sudo apt-get install -y nodejs
 ```
 
@@ -33,9 +33,9 @@ There are multiple ways of installing Node.js on MacOS. We will be using [Node V
 
 ```
 curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
-nvm install 20
-nvm use 20
-nvm alias default 20
+nvm install 22
+nvm use 22
+nvm alias default 22
 npm install npm --global # Upgrade npm to the latest version
 ```
 
@@ -61,12 +61,12 @@ If your version of Node.js is older and [not supported by Hardhat](../hardhat-ru
 
 ### MacOS
 
-You can change your Node.js version using [nvm](http://github.com/creationix/nvm). To upgrade to Node.js `20.x` run these in a terminal:
+You can change your Node.js version using [nvm](http://github.com/creationix/nvm). To upgrade to Node.js `22.x` run these in a terminal:
 
 ```
-nvm install 20
-nvm use 20
-nvm alias default 20
+nvm install 22
+nvm use 22
+nvm alias default 22
 npm install npm --global # Upgrade npm to the latest version
 ```
 

packages/hardhat-core/src/internal/cli/constants.ts

@@ -1 +1 @@
-export const SUPPORTED_NODE_VERSIONS = ["^18.0.0", "^20.0.0"];
+export const SUPPORTED_NODE_VERSIONS = ["^18.0.0", "^20.0.0", "^22.0.0"];