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Copper Lane Payments Read-only example

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Data Model & designs

The logical data model first, then each database design with its tables.

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Top level 4 Processor confirmation Order reference Payment Refund Payment state · illustrative PostgreSQL design 4 orders payments confirmations refunds

Entities Where it lives Tables

Logical Physical

Names Keys All attributes

Copper Lane Payments

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Notes

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Illustrative payment system · authored sample knowledge

The checkout timed out. Did we charge the customer?

Inspect the timeout branch. The missing response establishes uncertainty, not payment failure.

Keep unknown outcomes visible instead of inventing an answer.

Follow €100 A missing answer Follow the evidence Understand the change A request is not a result Share the understanding

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Processor confirmation → Payment

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Revision 1 Illustrative payment system · authored sample knowledge Loading… Version v1.16.2

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