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Challenges/process-open-banking-transactions-for-ledger·DataWeave·ADVANCED
DataWeaveADVANCED

Process Open Banking Transactions for Ledger

Transform paginated Open Banking `OBTransaction` records into a standardized internal ledger format. You will practice iterating over complex financial payloads, utilizing advanced pattern matching for math modifiers, and employing the `dw::core::Strings` module to sanitize and mask sensitive data.

#dw::core::strings#selectors#rest-api#dwl::core
BY @patryk_bandurski
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%dw 2.0
output application/json
---
payload
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The fastest way
to learn integration.

01.
Production payloads
Real CSV/JSON/XML you'll meet on day one — null fields, mixed casing, partial records.
02.
Design problems
What practitioners actually solve — null-safety, idempotency, retries, batch boundaries.
03.
Edge cases that break
Empty arrays, type coercion, deeply nested transforms, locale-specific dates.
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// WHAT YOU'LL BUILDHOW IT WORKS ↓
01.
Live DataWeave editor
Real DWL 2.0 IDE with helpers, modules, syntax highlighting.
02.
Test cases run on real runner
Same Go runner used in prod. Diffs show exactly which fields fail.
03.
3 graded attempts
Submit when you're ready. Score persists. Solution unlocks after pass or last attempt.
04.
Helpers & multi-module DWL
Bring in reusable %dw modules. Import, export, compose.
05.
XP & leaderboard
Points + XP awarded per challenge. Trail progress synced.
06.
Production-style payloads
Real CSV/JSON/XML — null fields, mixed casing, partial records.