OpenChainGraph Suite · CONTRACT A3 · arch #5

A2A Payment Rail Compliance

Note (dated 2026-08-04): a chain composes independent computations performed in an analytical order. No step's output is carried into the next step by the execution model; each step computes from its own declared inputs. This is true of every chain on this site, including chains whose per-step copy below reads as a data handoff.

A2A fee route optimisation > A2A reconciliation workbench > A2A compliance checklist > A2A rail command centre — composite A2A payment rail compliance mandate.

OpenChainGraph · 4 Steps payment mandate Hash-Anchored §4 chain_depth:4 Client-Side · Zero PII
Chain Topology — A2a Fee Route Optimizer → A2a Reconciliation Workbench → A2a Compliance Checklist → A2a Rail Command Center
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Market Rationale
Buyer: Open Banking / A2A Payments Product Manager
Forcing function: PSD3 A2A mandatory access; VoP Jul 2025; UK/EU A2A mandate acceleration
Live Execution

This page is the chain definition (plan). To run the chain step by step in your browser, with each step's kernel executing in-page and a composite hash over the outputs, open the live runner:

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Chain Stages · 4 Steps
1 ROOT · D0 catalog
A2a Fee Route Optimizer 01-a2a-fee-route-optimizer
fee_route_options and optimal_routing feed Stage 2 A2A reconciliation workbench
↓
2 D2 catalog
A2a Reconciliation Workbench 09-a2a-reconciliation-workbench
reconciliation_gaps and settlement_exceptions feed Stage 3 A2A compliance checklist
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3 D3 catalog
A2a Compliance Checklist 18-a2a-compliance-checklist
compliance_requirements and gap_assessment feed Stage 4 A2A rail command centre
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4 TERMINAL · D4 catalog
A2a Rail Command Center 82-a2a-rail-command-center
rail_operations_status and composite_a2a_mandate — final A2A payment rail mandate
▶ Run this chain (live) browser · real execution · composite §4 hash
Export Artifacts
Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.