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Challenges/build-order-payload-for-payment-gateway·DataWeave·ELEMENTARY
DataWeaveELEMENTARY

Build Order Payload for Payment Gateway

Nexova is integrating its e-commerce checkout with a payment gateway. The internal order model must be transformed into a strict REST API JSON payload. You will learn to map nested arrays, format currency values as exact strings, and inject flow variables into the final payload.

#rest-api
BY @patryk_bandurski
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DWL
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Every challenge ships with a real-world payload, a graded test suite, and a walkthrough by a practitioner. No surface-level theory — just problems, solved.

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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.
…
CHALLENGES
…
MODULES
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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.