Why architecture matters here
Multiparty fails on split confusion, escrow gaps, and refund chains. Architecture matters because signed splits + escrow + reversal must combine for correctness.
The architecture: every piece explained
The top strip is setup. Buyer signed intent total. Split rules seller + platform + tax. Escrow holds. Fulfillment event triggers release.
The middle row is settlement. Settlement per party signed. Tax + fees. Refund + reversal chain-wide. Audit + ledger.
The lower rows are governance. Dispute + arbitration. Compliance AML per party. Ops — reconciliation + reporting.
End-to-end flow
End-to-end: buyer pays $100 for goods on platform (10% fee). Escrow holds $100. Fulfillment confirmed. Settlement: seller $90, platform $10, tax as required. All signed + audited. If buyer requests refund, chain-wide reversal signs each transfer back.