Patrick Schurig 41d59de971 docs(optimiseur): versions allemande et anglaise de la section et de « Comment le moteur décide »
Prose traduite pour Présentation, Protocole, Contrat, Écrire un
optimiseur et la page du moteur ; ancres de titres identiques dans les
trois langues. Les blocs générés sont identiques d'une langue à l'autre.
Les exemples gardent un motif en français, comme l'exige le contrat.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-18 13:09:09 +02:00

2.6 KiB

Contract

The machine-readable contract describes the shape of every message of the protocol: an OpenRPC document whose messages are written in JSON Schema, with x-etm-… extensions for what OpenRPC cannot express — transport, fallback state machine, named validation rules, tolerances, closed lists.

The engine embeds it, and both its own tests and the conformance suite check it on both sides. The tables on the Protocol page are generated from it.

Download the contract

:material-download: Download etm-powersync-optimizer-protocol.openrpc.json{ .md-button }

The site serves the file as is, byte for byte, from the default branch of the engine repository. Its record:

Contract
Title etm-powersync — protocole moteur ↔ optimiseur
Protocol version 1.1
Format OpenRPC 1.3.2, JSON Schema in components.schemas
License GPL-3.0-or-later
File etm-powersync-optimizer-protocol.openrpc.json
Size 67215 bytes
SHA-256 29dfe5a3c94a06e94e95042c0ceefd4d6264fcca44265faa676a06fac1c07ded
Methods Handshake · GetPlan · UpdateLearned
Schemas 47
Semantic rules 19
Extensions (document) x-etm-fallback-machine · x-etm-generated · x-etm-reason-params · x-etm-semantic-rules · x-etm-tolerances · x-etm-transport
Extensions (methods) x-etm-direction · x-etm-notification · x-etm-timeout-s

Your box's contract: NymeaEnergy.GetOptimizerProtocol

The contract published here follows the engine's development; your box may carry an earlier version. To get the contract of the installed engine, ask the box: the JSON-RPC method NymeaEnergy.GetOptimizerProtocol returns the one it embeds. That is the one that is authoritative for an optimiser connected to that box.

The method is described in INTERFACE.md, in the engine repository, along with the other optimiser NymeaEnergy.* methods (endpoint, shared secret, status). Connecting to the API is described on the JSON-RPC API page.

Validating messages

The engine repository provides a validator, tools/etm-powersync-schema-check (Python, standard library): it checks a single message, a complete recorded session or traces against the contract, and applies the named validation rules on request.