How can I set up 2 AWS lambda functions, with one firing an event on eventBridge and the other reacting to it? - serverless-framework

Question

I'm using the serverless framework to try and test EventBridge.
The documentation is a little sparce, but for my test I would like to have two lambda functions created: first one publishes an event, the second consumes it.
Here is my YAML:
service: events
frameworkVersion: '2'
provider:
name: aws
runtime: nodejs12.x
lambdaHashingVersion: '20201221'
functions:
vehicle:
handler: handler.vehicle
events:
- httpApi:
path: /vehicle
method: '*'
bundle:
handler: handler.bundle
events:
- httpApi:
path: /bundle
method: '*'
- eventBridge:
eventBus: vehicle-bus
pattern:
source:
- aos.vehicle.upload
detail-type:
- VehicleUpload
and my handler.js
"use strict";
const AWS = require('aws-sdk');
module.exports.vehicle = async (event) => {
const eventBridge = new AWS.EventBridge({ region: 'us-east-1' });
const vrm = 'WR17MMN'
return eventBridge.putEvents({
Entries: [
{
EventBusName: 'veihcle-bus',
Source: 'aos.vehicle.upload',
DetailType: 'VehicleUpload',
Detail: `{ "Registration": "${vrm}" }`,
},
]
}).promise()
};
module.exports.bundle = async (event) => {
return {
statusCode: 200,
body: JSON.stringify(
{
message: "BUNDLE",
input: event,
aos: "First test OK",
},
null,
2
),
};
};
(I realise I can't just return that from the Lambda but it also needs to be an endpoint. If I make the function body of bundle empty I still get a server error.
What am I missing?

Answer 1

So you need this minimal setup:
org: myOrg
app: my-events
service: event-bridge-serverless
provider:
name: aws
runtime: nodejs10.x
region: eu-west-1
lambdaHashingVersion: 20201221
environment:
DYNAMODB_TABLE: ${self:service}-dev
eventBridge:
useCloudFormation: true
iamRoleStatements:
- Effect: "Allow"
Action:
- "events:PutEvents"
Resource: "*"
functions:
asset:
handler: handler.asset
events:
- eventBridge:
eventBus: my-events
pattern:
source:
- my.event