Skip to content

Instantly share code, notes, and snippets.

@phawk phawk/getToken.js
Created Aug 23, 2019

Embed
What would you like to do?
Shopify exchange OAuth code for token and create user account
const crypto = require("crypto")
const querystring = require("querystring")
const fetch = require("isomorphic-fetch")
const Account = require("./models/account")
exports.handler = async (event, context) => {
const { shop, hmac, code, timestamp } = event.queryStringParameters
const apiKey = process.env.SHOPIFY_API_KEY
const apiSecret = process.env.SHOPIFY_API_SECRET
if (shop && hmac && code) {
const map = { code, shop, timestamp }
const message = querystring.stringify(map)
const providedHmac = Buffer.from(hmac, 'utf-8')
const generatedHash = Buffer.from(
crypto
.createHmac('sha256', apiSecret)
.update(message)
.digest('hex'),
'utf-8'
)
let hashEquals = false
try {
hashEquals = crypto.timingSafeEqual(generatedHash, providedHmac)
} catch (e) {
hashEquals = false
};
if (!hashEquals) {
return {
statusCode: 400,
body: "HMAC validation failed"
}
}
const accessTokenRequestUrl = `https://${shop}/admin/oauth/access_token`
const accessTokenPayload = {
client_id: apiKey,
client_secret: apiSecret,
code,
}
const tokenRes = await fetch(accessTokenRequestUrl, {
method: "POST",
headers: {
"Accept": "application/json",
"Content-Type": "application/json"
},
body: JSON.stringify(accessTokenPayload)
})
const tokenJson = await tokenRes.json()
const acc = new Account({
id: shop,
shopifyToken: tokenJson.access_token
})
const { id, token } = await acc.save()
return {
statusCode: 200,
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ id, token })
}
} else {
return {
statusCode: 400,
body: "Required parameters missing"
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.