OpenChainGraph Suite · CONTRACT A3 · arch #5

Marketplace Platform Payments

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.

Marketplace fee waterfall design > virtual account structure simulation > payout rail cost/finality modelling > split-payment escrow simulation > marketplace payout flow design — composite marketplace payments mandate.

OpenChainGraph · 5 Steps payment mandate Hash-Anchored §4 chain_depth:5 Client-Side · Zero PII
Chain Topology — Marketplace Fee Waterfall Designer → Virtual Account Structure Simulator → Payout Rail Cost Finality Modeller → Split Payment Escrow Simulator → Marketplace Payout Flow Designer
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Market Rationale
Buyer: Head of Payments / CTO at marketplace or platform operator
Forcing function: PSD3 PSP obligations for platforms; split-payment escrow requirements; marketplace VAT rules
Live Execution

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Chain Stages · 5 Steps
1 ROOT · D0 catalog
Marketplace Fee Waterfall Designer 138-marketplace-fee-waterfall-designer
fee_waterfall and revenue_split feed Stage 2 virtual account structure simulation
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2 D2 catalog
Virtual Account Structure Simulator 146-virtual-account-structure-simulator
va_structure and settlement_routing feed Stage 3 payout rail cost/finality model
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3 D3 catalog
Payout Rail Cost Finality Modeller 147-payout-rail-cost-finality-modeller
rail_economics and finality_comparison feed Stage 4 split-payment escrow simulation
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4 D4 catalog
Split Payment Escrow Simulator 151-split-payment-escrow-simulator
escrow_terms and fund_flows feed Stage 5 marketplace payout flow designer
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5 TERMINAL · D5 catalog
Marketplace Payout Flow Designer 159-marketplace-payout-flow-designer
payout_flow and composite_marketplace_mandate — final marketplace payments mandate
▶ Run this chain (live) browser · real execution · composite §4 hash
Export Artifacts
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