Transact error

[hallie]

Trying to make it easier to understand which item(s) caused the transaction to be canceled. Current approach is to return list of tuples with format ({item}, 'reason'), but may make more sense to do

{
    'reason1': [{}, {}],
    'reason2': [{}]
}

or adding a failure_reason key to each item in the list

formerly this but i have no idea how to use github

[ikonst]

Me and @jpr71 just stumbled on another reason for this.