Module engine_deps 

Shared dependency bundle for the UnifiedEngine and its sub-managers.

EngineDeps groups all Arc-shared services that the engine’s sub-managers need to borrow during order processing, margin checks, and expiry handling. By bundling these into a dedicated struct the engine avoids passing 10+ parameters to every delegated method call.

Structs

DepositUpdateWatermark

EngineCtx

All mutable + immutable shared state that managers need to access.

EngineDeps

Shared, immutable (from the manager’s perspective) dependencies.

EngineMmpState

Engine-internal MMP state for a single (wallet, currency) pair.

EnginePosition

A single position in the engine’s internal state.

MmpFillRecord

A single fill record tracked by MMP.

Enums

BalanceLedgerMutationSource

Functions

apply_fill_to_positions

Apply a fill to the engine position map, creating or removing entries as needed.

apply_option_deposit_to_positions

Credit externally deposited option-token inventory into engine positions.

apply_option_withdrawal_to_positions

Debit option-token inventory for an on-chain withdrawal.

classify_rejection_reason

Classify a rejection reason string into a metric label.

engine_positions_to_portfolio_balance

Convert engine positions to a PortfolioBalance for margin calculations.