====== 8.8 FX Cash-Flow Computation Node Mapping ======

[[fxdemo:04-part:08-mapping-from-fx-logical-nodes-to-implementation-artifacts:start | Go To Mapping from FX Logical Nodes to Implementation Artifacts ]]

The FX Cash-Flow Computation [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_node|Node]] maps to the Phase 0 implementation artifact that computes projected or derived FX cash-flow obligations from FX Contract State and related context.

The implementation artifact performs the Cash-Flow Computation [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_node_role|Role]]. It consumes FX Contract State and related semantic or transaction context, applies the selected Phase 0 computation approach, produces an implementation representation of FX Cash-Flow Obligation, and publishes that obligation through the [[dido:99_annexes:annex-b-terms-and-definitions:d:dds|DDS]] Topic that realizes the FX Cash-Flow Obligation [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_communication_endpoint|Endpoint]].

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**Table 8-6:** FX Cash-Flow Computation Node implementation mapping.
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^ Mapping Concern ^ Phase 0 Implementation Treatment ^
| FX logical Node | FX Cash-Flow Computation Node |
| Primary Node Role | Cash-Flow Computation Role |
| Primary Runtime Plane | FX Logical Data Plane |
| Supporting Runtime Planes | FX Logical Audit and Provenance Plane |
| Primary implementation responsibility | Compute projected or derived FX cash-flow obligations. |
| Primary DDS interactions | Subscribe to the DDS Topic that realizes the FX Contract State Endpoint; publish to the DDS Topic that realizes the FX Cash-Flow Obligation Endpoint. |
| Primary data artifacts | IDL and generated types representing the FX Contract State and the FX Cash-Flow Obligation. |
| Supporting artifacts | Computation helper module, model or calculation configuration, logging helper, and traceability metadata. |
| Traceability expectation | Implementation artifact traces to the FX Cash-Flow Computation Node, Cash-Flow Computation Role, FX Contract State Endpoint, FX Cash-Flow Obligation Endpoint, and FX Cash-Flow Obligation. |

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