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@kglozhkin/sim-state-core

v0.1.0

Published

Pure in-memory account/position/PnL state. Single source of truth shared by sim-state (online + backtest); eliminates backtest/live PnL skew.

Downloads

123

Readme

@kglozhkin/sim-state-core

Pure in-memory ядро учёта собственного состояния бота: позиции, капитал, realized/unrealized P&L, отчёт. Единственный источник истины — используется сервисом sim-state и в бэктесте (питается филлами от execution-simulator), и в live (от order-gateway / user-канала). Один код → нет backtest/live skew по PnL.

Прецедент — @kglozhkin/orderbook-reducer (pure-lib, без NestJS/NATS).

API

const s = new SimState({ startingCapital: 1000 });
s.applyPlaced(order);     // OrderPlaced — lock капитала под BUY
s.applyFilled(fill);      // OrderFilled — позиция + realized + fees, конверт lock
s.applyCanceled(cancel);  // OrderCanceled — free lock
s.setMark(tokenId, mid);  // mark для unrealized
s.snapshot();             // { account, positions(+mark/unrealized), openOrders }
s.report();               // { summary, positions, fills } — паритет execution-simulator

Модель капитала (v1, long-ориентированная): available = C0 + realizedNet − openLongCost − lockedBuy, equity = C0 + realizedNet + unrealized.

Команды

yarn install
yarn build
yarn test    # unit + equivalence (vs вендорнутый PositionTracker)

Математика PositionBook.applyFill портирована дословно из execution-simulator/src/pnl/position-tracker.ts; equivalence.test.ts стережёт дрейф. Авторитетный паритет — e2e отчёта (sim-state vs execution-simulator OUTPUT_JSON) перед чисткой execution-simulator.