Retrieving the OCPP MessageID from the OCPP Messages

[fabiolnm]

Edit

Is there a way of intercepting the original request?

ocpp-node-ts/src/impl/Protocol.ts

Lines 30 to 37 in fac0c19

	this.socket.on(
	"message",
	(message) => {
	this.onMessage(message.toString());
	}
	);
	}
	onMessage(message: string) {

Similarly, intercept the resulting response/error?

ocpp-node-ts/src/impl/Protocol.ts

Lines 237 to 241 in fac0c19

	const result = JSON.stringify([
	CALLRESULT_MESSAGE,
	messageId,
	responsePayload]);
	this.socket.send(result);

ocpp-node-ts/src/impl/Protocol.ts

Lines 115 to 120 in fac0c19

	const result = JSON.stringify([CALLERROR_MESSAGE,
	messageId,
	error.code,
	error.message,
	error.details || {}]);
	this.socket.send(result);

This would be useful for features that depend on a Charger message logs database.

Original Message

According to OCPP 2.0.1 specs:

4.2.1. CALL
A CALL always consists of 4 elements: The standard elements MessageTypeId and MessageId, a specific Action that is required on the other side and a payload, the arguments to the Action. The syntax of a CALL looks like this:

[<MessageTypeId>, "<MessageId>", "<Action>", {<Payload>}]

MessageId string[36] This is a unique identifier that will be used to match request and result.

Given the README example, is there a way of retrieving the MessageId from the OCPP message?

    client.on('BootNotification', (request: BootNotificationRequest, cb: (response: BootNotificationResponse) => void) => {
        const response: BootNotificationResponse = {
            status: 'Accepted',
            currentTime: new Date().toISOString(),
            interval: 60,
        };
        cb(response);
    });