# Automating AMB Access Proposal Notifications with CloudWatch Events
<a name="automating-proposals-with-cloudwatch-events"></a>

Amazon CloudWatch Events enables you to automate your AWS services and respond automatically to system events. Events from AWS services are delivered to CloudWatch Events in near real time on a best-effort basis. You can write simple rules to indicate which events are of interest to you, and what automated actions to take when an event matches a rule. With AMB Access, you can monitor CloudWatch Events events to respond to proposals, including invitations sent to your AWS account to join a network, and notification that proposals are `APPROVED` or `REJECTED`. Some examples include notifying an Amazon SNS topic or an AWS SMS queue when an invitation is sent or when a proposal made by a member in your account changes status.

For more information, see the [Amazon CloudWatch Events User Guide](https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/).

## Example AMB Access Events
<a name="automating-proposals-sample-events"></a>

### AWS Account Received an Invitation Event
<a name="sample-event-invitation"></a>

The `detail-type` of these messages is `Managed Blockchain Invitation State Change`.

```
{
    "version": "0",
    "id": "abcd1234-eeee-4321-a1a2-123456789012",
    "detail-type": "Managed Blockchain Invitation State Change",
    "source": "aws.managedblockchain",
    "account": "123456789012",
    "time": "2019-04-08T23:40:20.628Z",
    "region": "us-east-1",
    "resources": [],
    "detail": {
        "invitationId": "i-XL9MDD6LVWWDNA9FF94Y4TFTE",
        "networkId": "n-MWY63ZJZU5HGNCMBQER7IN6OIU",
        "networkName": "ExampleCorpNetwork",
        "status": "PENDING",
        "expirationDate": "2019-04-09T23:40:20.628Z",
        "message": "You have received invitation i-XL9MDD6LVWWDNA9FF94Y4TFTE for Amazon Managed Blockchain (AMB) Network n-MWY63ZJZU5HGNCMBQER7IN6OIU and it will expire at 2016-12-16 20:42 UTC."
    }
}
```

### Proposal State Change Event
<a name="sample-event-proposal-state-change"></a>

The `detail-type` of these messages is `Managed Blockchain Proposal State Change`. The following example shows an event for a proposal that changed state to `APPROVED`.

```
{
    "version": "0",
    "id": "abcd1234-eeee-4321-a1a2-123456789012",
    "detail-type": "Managed Blockchain Proposal State Change",
    "source": "aws.managedblockchain",
    "account": "123456789012",
    "time": "2019-04-08T23:40:20.628Z",
    "region": "us-east-1",
    "resources": [],
    "detail": {
        "proposalId": "p-ZR7KUD2YYNESLNG6RQ33X3FUFE",
        "networkId": "n-MWY63ZJZU5HGNCMBQER7IN6OIU",
        "status": "APPROVED",
        "proposedByMemberId": "m-K46ICRRXJRCGRNNS4ES4XUUS5A",
        "proposedByMemberName": "NetworkMember1",
        "expirationDate": "2019-04-09T23:40:20.628Z",
        "description": "Proposal to remove AnyCompany from supply chain blockchain network.",
        "message": "Voting on proposal p-ZR7KUD2YYNESLNG6RQ33X3FUFE in Amazon Managed Blockchain (AMB) Network n-MWY63ZJZU5HGNCMBQER7IN6OIU completed at 2016-19-16T20:10:50Z UTC and the proposal was approved."
    }
}
```