feat(trade): add multi-leg option order support - #575
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Add `TradeContext.submit_multileg` (POST /v1/trade/order/multileg) for submitting multi-leg option combination orders (vertical spreads, straddles, strangles, collars, etc.), where all legs are placed together as a single strategy order. Expose multi-leg strategy information on order queries and the order push: `Order`, `OrderDetail`, and `PushOrderChanged` gain an optional `multi_leg` field (`MultiLegInfo`), present only for multi-leg option combination orders. Adds the `MultiLegStrategy`, `MultiLegPosition`, and `ContractDirection` enums. Implemented across all SDK layers: Rust core, C, C++, Java, Node.js, and Python (incl. the openapi.pyi stub). Also document in CLAUDE.md the full list of SDK layers that must be kept in sync when adding an API or type. Ref: longbridge/developers#1212
The field was dropped from the multi-leg `legs` definition in the API docs (longbridge/developers#1215), so the server does not return it. Removed across all six SDK layers (Rust, C, C++, Java, Node.js, Python) and from the unreleased changelog entry that listed it.
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Summary
Implements the multi-leg option order feature from longbridge/developers#1212 across all six SDK layers (Rust core, C, C++, Java, Node.js, Python).
New API
TradeContext.submit_multileg→POST /v1/trade/order/multileg— submit a multi-leg option combination order (vertical spreads, straddles, strangles, collars, etc.) whose legs are placed together as a single strategy order. Takesside,order_type,submitted_quantity,strategy(MultiLegStrategy), a list of legs (symbol+ratio_quantity), and optionalsubmitted_price/remark/client_request_id; returns the existingSubmitOrderResponse.New response field
Order(today_orders/history_orders),OrderDetail(order_detail), and thePushOrderChangedorder-changed event gain an optionalmulti_legfield (MultiLegInfo), present only for multi-leg option combination orders — carryingstrategy,strategy_name,multileg_id,code, and the combinationlegs(each withsymbol,side,position,ratio_quantity,strike_price,expire_date,contract_direction,contract_size).MultiLegStrategy,MultiLegPosition,ContractDirection.Layers & verification
cargo check/clippy --all --all-featuresclean;cargo +nightly fmtcargo build -p longbridge-c(regenerateslongbridge.h)g++ -std=c++17 -fsyntax-onlyagainst regenerated headercargo build -p longbridge-java+ fulljavaccompilenpm run build:debug(regeneratesindex.d.ts/index.js)cargo check;openapi.pyistub updated by handNotes
CLAUDE.mdthe full list of SDK layers that must be kept in sync when adding an API or type (previously missing C++ and Java).🤖 Generated with Claude Code
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