Challenges/ch-67-pii-masking-module-for-customer-export
DataWeaveINTERMEDIATE

PII Masking Module for Customer Export

A third-party compliance reporting platform requires customer records before dispatching quarterly regulatory reports. Before any data leaves your Mule application, all personally identifiable information must be masked: email addresses, phone numbers, and bank account numbers. This challenge teaches you how to build a reusable utils::Masking custom DataWeave module, implement three masking functions inside it, and apply them safely during array iteration — including null-safe handling for optio

#custom-module#pii#rest-api
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%dw 2.0
output application/json
---
payload
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// WHAT YOU'LL BUILDHOW IT WORKS ↓
01.
Live DataWeave editor
Real DWL 2.0 IDE with helpers, modules, syntax highlighting.
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Test cases run on real runner
Same Go runner used in prod. Diffs show exactly which fields fail.
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Helpers & multi-module DWL
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06.
Production-style payloads
Real CSV/JSON/XML — null fields, mixed casing, partial records.