Greetings from the Tryvium Team,
Here is how to integrate a Transferwise webhook with Slack notifications. We have chosen to use cloudflare workers as a perfect case study for serverless applications using cloudflare.
First of all set up things on Transferwise side
Secondly create an incoming webhook
Finally take the script below and create a new cloudflare worker, filling the SLACK_WEBHOOK_URL variable with your actual URL.
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| SOFTWARE. |
| addEventListener('fetch', event => { | |
| event.respondWith(handleRequest(event.request)) | |
| }) | |
| const SLACK_WEBHOOK_URL = "<Your slack custom integration webhook URL>" | |
| /** | |
| * Respond to the request | |
| * @param {Request} request | |
| */ | |
| async function handleRequest(request) { | |
| // THIS SCRIPT DOES NOT CHECK AGAINST REQUESTS OUTSIDE FROM TRANSFERWISE | |
| // NOR IT PERFORMS SIGNATURE CHECK. Feel free to comment with a fix :) | |
| if(request.method === "POST") { | |
| const requestJSON = await request.json() | |
| const { subscriptionId, profileId, amount, currency, eventType } = requestJSON | |
| if(eventType) { | |
| // BALANCE NOTIFICATION EVENTS | |
| const slackPayload = { | |
| text : `_*BALANCE NOTIFICATION*_: | |
| > *SUBSCRIPTION ID*: ${subscriptionId} | |
| > *PROFILE ID*: ${profileId} | |
| > *AMOUNT*: ${currency} ${amount} | |
| > *EVENT TYPE*: ${eventType}` | |
| } | |
| await fetch(SLACK_WEBHOOK_URL, { | |
| method: "POST", | |
| body: JSON.stringify(slackPayload) | |
| }) | |
| } else { | |
| // TRANSFER UPDATE NOTIFICATION EVENTS | |
| const { subscriptionId, profileId, resourceId, newState, eventTime } = requestJSON | |
| if (eventTime) { | |
| const slackPayload = { | |
| text : `_*TRANSFER UPDATE NOTIFICATION*_: | |
| > *SUBSCRIPTION ID*: ${subscriptionId} | |
| > *PROFILE ID*: ${profileId} | |
| > *RESOURCE ID*: ${resourceId} | |
| > *NEW STATE*: ${newState} | |
| > *EVENT TIME*: ${new Date(eventTime).getUTCDate().toLocaleString()}` | |
| } | |
| } | |
| } | |
| } | |
| // It is important to return 200 (and not for example 204) | |
| // to test the webhook on Transferwise side. | |
| return new Response("", {status: 200}) | |
| } |
Nice script, the Transferwise test won't show up in Slack, so you can run a complete test by invoking the worker endpoint with a payload from a terminal:
curl -X POST \ -H 'Content-type: application/json' \ --data '{"subscriptionId": "sid_test", "profileId":"profile_test", "amount":"1000", "currency":"USD", "eventType":"transfer"}' \ https://<WORKER_SUBDOMAIN>.workers.dev/