Page Comparison

...

{
result: 'success',
parameters: [{name: 'param1', value: 'Bob'}, {name: 'param2', value: '42'}] // optional if you want to pass parameters back through the interaction extension webhook as self attested credential
}

or

{
result: 'error',
errorMessage: 'We can not finish web view step' // Error message to show to the user in the app
}