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Receive the Verifier data with a webhook in your backend
If you want to receive the data in your backend, create a webhook and copy the URL of the webhook in the page (“Webhook URL of your application”).
- POST request with header Content-Type : application/json and in option an API KEY authentication ‘key’ : <your_key>)’
- Event types : ‘VERIFICATION’ or ‘VERIFICATION _DATA’
Example :
{"event": "VERIFICATION", "id": "1234", "presented": "2022-11-15T14:59:43Z", "vc_type": ["Over13"], "verification": true}
- event : string ‘VERIFICATION’ or ‘VERIFICATION_DATA’
- id : string : The id passed through the call or the user blockchain address
- presented : string : date of the user connexion
- vc_type : ov13, over18, loyalty cards, etc
- verification : Signature check
Event “VERIFICATION_DATA” : in that case the webhook receives the full verifiable presentations signed by the wallet with the verifiable credentials signed by the issuer.
Below an example of a webhook code in python :
from flask import Flask, jsonify, request
app = Flask(__name__)
app.config.update(SECRET_KEY = "abcdefgh") # Flask key
verifier_secret = 'c8f90f24-5506-11ed-b15e-0a1628958560' # take the client_secret from the platform https://talao.co
@app.route('/webhook', methods=['POST'])
def dapp_webhook() :
if request.headers.get('key') != verifier_secret :
return jsonify('Forbidden'), 403
data = request.get_json()
if data['event'] == 'VERIFICATION' : # this is an event to catch a digest of the credential
print(data)
return jsonify('ok')
if __name__ == '__main__': # use Gunicordn for production
IP = "127.0.0.1"
app.run( host = IP, port=4000, debug =True)