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Interactive Infrastructure Simulation

Tracing the structure of a card payment authorization.

A Savion-styled version of the original explorer. Same flow logic, same step-by-step simulation, same approval or decline path, rebuilt to match the visual language of the new site.

This page is designed as a practical companion to the broader Savion framework on payment infrastructure, routing, and transaction design.

Customer Cardholder Merchant POS terminal Acquirer Acquiring bank Scheme Visa / Mastercard Issuer Bank Issuing bank Settlement Authorization request Authorization response
Idle
In transit
Approved
Declined

Real-time notifications

No simulation started.

Outcome summary

Waiting for simulation…
Focus Authorization

The tool isolates the authorization leg of a card payment before final funds movement takes place.

Logic Balance-based

This simplified version decides approval or decline entirely on available cardholder funds.

Use case Infrastructure education

Useful for showing the role of each intermediary inside a standard card-rail transaction flow.

Simplified simulator: authorization is based exclusively on the available balance. In the real world, fraud controls, strong customer authentication, risk scoring, issuer checks, and routing logic also come into play.

Explore the structure behind the transaction.

Use this page as a visual companion to the broader Savion framework on payment infrastructure and transaction design.

Explore the Framework Digital Euro Research →