Add a token check #4

	name: Build and publish
	on:
	push:
	branches-ignore:
	- stable
	- beta
	- develop
	pull_request:
	types: [closed]
	branches:
	- stable
	- beta
	- develop
	env:
	NODE_VERSION: 20

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: ${{ env.NODE_VERSION }}
	cache: 'yarn'

	- name: Install project
	run: yarn

	- name: Build contracts
	run: yarn compile

	- name: Determine version
	run: \|
	export BRANCH=${GITHUB_REF##*/}
	echo "BRANCH=$BRANCH" >> $GITHUB_ENV
	echo "Branch $BRANCH"
	export VERSION=$(bash ./scripts/calculate_version.sh)
	echo "VERSION=$VERSION" >> $GITHUB_ENV
	echo "Version $VERSION"
	( test $BRANCH = "stable" && export PRERELEASE=false ) \|\| export PRERELEASE=true
	echo "PRERELEASE=$PRERELEASE" >> $GITHUB_ENV

	- name: Publish NPM package
	run: ./scripts/publish_package.sh
	env:
	BRANCH: ${{ env.BRANCH }}
	NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

	- name: Create Release
	uses: ncipollo/release-action@v1
	with:
	tag: ${{ env.VERSION }}
	prerelease: ${{ env.PRERELEASE }}

	clean:
	runs-on: ubuntu-latest
	if: github.event.pull_request.merged
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: ${{ env.NODE_VERSION }}
	cache: 'yarn'

	- name: Remove feature tag
	env:
	NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
	run: \|
	export SOURCE_BRANCH=${GITHUB_HEAD_REF##*/}
	echo "Source branch: $SOURCE_BRANCH"
	npm dist-tag rm @skalenetwork/paymaster-interfaces $SOURCE_BRANCH

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