Architecture / 02

Contract architecture

Three core contract types implement upgradeable trading coordination and symbol-specific ERC-20 representations.

Evidence scope · implementation, public chain state, third-party reports, operator disclosures

StockTrading

UUPS-upgradeable coordinator for order transfers, events, fees, refunds and owner-only token operations.

StockTokenFactory

Creates and indexes one StandardStockToken per symbol.

StandardStockToken

ERC-20 representation with 8 decimals and owner-controlled mint / burn.

Upgradeable path

User → Proxy (stable address) → Current implementation
                                  ^
                                  |
                           owner authorizes

Privileged surface

Control	Effect
`setReceivers`	Changes fund, token and fee destinations.
`setUsdtContract`	Changes settlement-token contract.
`setStockTokenFactory`	Changes symbol-to-token resolution.
`mintStockTokens` / `burnStockTokens`	Changes user token supply.
`_authorizeUpgrade`	Allows owner-approved implementation replacement.

← System map Order lifecycle →