How to set constant httpLink dynamically with shop_domain

[tomlober]

Hello,

In react-apollo you set httplink with URL.
How to set set this constant with shopify_domain vars ?

const httpLink = createHttpLink({ uri: MyURL })

const middlewareLink = setContext(() => ({
headers: {
'X-Shopify-Storefront-Access-Token': MyToken
}
}))

All the best,

ToM