How can I trigger a `action.intent.INTENT_NAME` intent from my webhook? - actions-on-google

Question

I want to create a chatbot with Dialogflow and Google Assistant along with Google Transactions API for enabling a user to order a chocolate box. For now my agent contains the following four intents:
Default Welcome Intent (text response: Hello, do you want to buy a chocolate box?)
Default Fallback Intent
Int1 (training phrase: Yes, I want, fulfilment: enabled webhook call)
Int2 (event: actions_intent_TRANSACTION_REQUIREMENTS_CHECK )
I am using Dialogflow Json instead of Node.js to connect my agent with Transactions API. I want to test that the user meets the transaction requirements (when ordering the chocolate box) by using the actions.intent.TRANSACTION_REQUIREMENTS_CHECK action of Google actions. For this reason, following Google docs, when Int1 is triggered I am using a webhook which connect Google Assistant to the following python script (back-end):
from flask import Flask, render_template, request, jsonify
from flask_cors import CORS
import requests
app = Flask(__name__)
CORS(app)
#app.route("/", methods=['POST'])
def index():
data = request.get_json()
intent = data["queryResult"]["intent"]["displayName"]
if (intent == 'Int1'):
return jsonify({ "data": {
"google": {
"expectUserResponse": True,
"isSsml": False,
"noInputPrompts": [],
"systemIntent": {
"data": {
"#type": "type.googleapis.com/google.actions.v2.TransactionRequirementsCheckSpec",
"paymentOptions": {
"actionProvidedOptions": {
"displayName": "VISA-1234",
"paymentType": "PAYMENT_CARD"
}
}
},
"intent": "actions.intent.TRANSACTION_REQUIREMENTS_CHECK"
}
}
}
})
else:
return jsonify({'message': 'HERE'})
if __name__== "__main__":
app.run(debug=True)
The json which I return above when intent = 'Int1' is the one specified at Google docs for "Checking requirements with your own payment method".
According to Google docs, this must be done next:
Receiving the result of a requirements check
After the Assistant fulfills the intent, it sends your fulfillment a
request with the actions.intent.TRANSACTION_REQUIREMENTS_CHECK intent
with the result of the check.
To properly handle this request, declare a Dialogflow intent that's
triggered by the actions_intent_TRANSACTION_REQUIREMENTS_CHECK event.
For this reason, I defined Int2 and as its event the actions_intent_TRANSACTION_REQUIREMENTS_CHECK.
However, I do not receive anything at my back-end like a result of the check and therefore I do not know if the action actions.intent.TRANSACTION_REQUIREMENTS_CHECK is really triggered. Why is this happening?
In general, how can I trigger one actions.intent.INTENT_NAME intent from my webhook/back-end?
When I am using the v2 version of Dialogflow, I am getting the following info/message about the webhook on Dialogflow when Int1 is triggered:
"webhookStatus": {
"code": 3,
"message": "Webhook call failed. Error: Failed to parse webhook JSON response: Cannot find field: data in message google.cloud.dialogflow.v2.WebhookResponse."
}
In the same case, I am getting the following info/message about the webhook on Google Assistant simulator when Int1 is triggered:
"responseMetadata": {
"status": {
"code": 14,
"message": "Webhook error (206)"
}
Finally, let me mention that I am testing all this with Python and ngrok at my local computer so perhaps this poses a problem because at the beginning of Google docs the following is mentioned:
Warning: The Actions Web Simulator should not be used to test an app
with transactions. Please use an Assistant-enabled Android or iOS
device to accurately test your app during development.

Answer 1

I finally solved this problem.
I had to replace the key "data" in the json which I was sending back when Int1 was triggered with the key "payload". In other words, I had to adjust my fulfilment response to the v2 version of Dialogflow.
Therefore, now I do get a second post request at my back-end which is sent because of the trigger of actions.intent.TRANSACTION_REQUIREMENTS_CHECK and of Int2.
Specifically, I get the following:
{
"responseId": "*****************************",
"queryResult": {
"queryText": "actions_intent_TRANSACTION_REQUIREMENTS_CHECK",
"parameters": {},
"allRequiredParamsPresent": true,
"fulfillmentText": "HERE",
"fulfillmentMessages": [
{
"text": {
"text": [
"HERE"
]
}
}
],
"outputContexts": [
{
"name": "*****************************"
},
{
"name": "*****************************"
},
{
"name": "*****************************"
},
{
"name": "*****************************"
},
{
"name": "*****************************"
},
{
"name": "*****************************",
"parameters": {
"TRANSACTION_REQUIREMENTS_CHECK_RESULT": {
"#type": "type.googleapis.com/google.actions.v2.TransactionRequirementsCheckResult",
"resultType": "OK"
}
}
}
],
"intent": {
"name": "*****************************",
"displayName": "Int2"
},
"intentDetectionConfidence": 1,
"diagnosticInfo": {},
"languageCode": "en-us"
},
"originalDetectIntentRequest": {
"source": "google",
"version": "2",
"payload": {
"isInSandbox": true,
"surface": {
"capabilities": [
{
"name": "actions.capability.WEB_BROWSER"
},
{
"name": "actions.capability.MEDIA_RESPONSE_AUDIO"
},
{
"name": "actions.capability.SCREEN_OUTPUT"
},
{
"name": "actions.capability.AUDIO_OUTPUT"
}
]
},
"inputs": [
{
"rawInputs": [
{
"inputType": "KEYBOARD"
}
],
"arguments": [
{
"extension": {
"#type": "type.googleapis.com/google.actions.v2.TransactionRequirementsCheckResult",
"resultType": "OK"
},
"name": "TRANSACTION_REQUIREMENTS_CHECK_RESULT"
}
],
"intent": "actions.intent.TRANSACTION_REQUIREMENTS_CHECK"
}
],
"user": {
"lastSeen": "2018-05-16T11:15:14Z",
"locale": "en-US",
"userId": "*****************************"
},
"conversation": {
"conversationId": "1526470000479",
"type": "ACTIVE",
"conversationToken": "[]"
},
"availableSurfaces": [
{
"capabilities": [
{
"name": "actions.capability.SCREEN_OUTPUT"
},
{
"name": "actions.capability.AUDIO_OUTPUT"
}
]
}
]
}
},
"session": "*****************************"
}

Answer 2

I think your response object is incorrect. the intent attribute should be inside the systemIntent object
"data": {
"google": {
"expectUserResponse": true,
"isSsml": false,
"noInputPrompts": [],
"systemIntent": {
"intent": "actions.intent.TRANSACTION_REQUIREMENTS_CHECK",
"data": {
"#type": "type.googleapis.com/google.actions.v2.TransactionRequirementsCheckSpec",
"paymentOptions": {
"actionProvidedOptions": {
"displayName": "VISA-1234",
"paymentType": "PAYMENT_CARD"
}
}
}
}
}
}