Thought leadership
Lessons from 100+ MRA Test Transactions
What we learned during MRA certification
Going through MRA certification is intense. Here are the lessons we learned.
Lesson 1: Read the spec twice
The MRA technical guide is detailed. Read it twice before writing any code.
Lesson 2: Test the hash chain manually
Our hash chain implementation was correct. But it was off-by-one error in the field selection that the MRA caught.
Lesson 3: Offline mode is harder than it looks
We thought offline mode was straightforward. It is not. The state machine for fiscalisation is complex.