> ## Documentation Index > Fetch the complete documentation index at: https://docs.huam.io/llms.txt > Use this file to discover all available pages before exploring further. # Smart Contract Architecture > Overview of the protocol's modular smart contract design Smart Contract Architecture Huam implements a modular "Hub-and-Spoke" architecture that separates core protocol functions from cross-chain strategy execution. This design secures the stablecoin ledger on a single network while enabling capital deployment across multiple chains. ## System Overview | Domain | Location | Function | | ------------------------------- | ------------------- | -------------------------------------------------------- | | **Core Contracts (Hub)** | Main Network (Base) | User deposits, stablecoin accounting, yield distribution | | **Strategy Contracts (Spokes)** | Multiple EVM chains | LP position management, hedging, fee collection | ## Core Contracts Core contracts manage the protocol's ledger and all user-facing interactions. They are deployed on the main network and control the issuance of USDhm and sUSDhm. ### Minter The gateway for USDhm issuance and redemption. * **Collateral Custody**: Holds USDC backing all *unstaked* USDhm. This capital is never deployed to strategies. * **Issuance**: Mints USDhm 1:1 against USDC deposits. * **Redemption**: Burns USDhm to return USDC to users (minus 0.1% fee). ### Staking Vault The interface for earning yield, implementing the ERC-4626 tokenized vault standard. * **Share Accounting**: Issues sUSDhm representing a user's proportional claim on the yield-generating portfolio. * **Fund Routing**: Routes staked USDC to the Strategy layer via the Collector. * **Yield Accrual**: Receives rewards from the Reward Manager, increasing the sUSDhm exchange rate over time. ### Reward Manager The central buffer between raw protocol earnings and user distributions. * **Revenue Aggregation**: Collects yield bridged back from Strategy Contracts across all chains. * **Smoothed Distribution**: Streams rewards to the Staking Vault at a controlled rate to reduce APY volatility. * **First-Loss Buffer**: Absorbs short-term losses before they affect staker principal. See [Protection Layers](/protocol-architecture/protection-layers). ## Strategy Contracts Strategy contracts handle capital deployment and position management. They are deployed on each chain where the protocol operates. ### Collector The satellite treasury on each chain. * **Capital Routing**: Receives funds from Core and allocates to Adaptors based on target weights. * **Cross-Chain Bridging**: Manages movement of principal (outbound) and revenue (inbound) between chains. * **NAV Reporting**: Aggregates position values from all connected Adaptors to report total deployment value. ### Adaptors Specialized connectors for external DeFi protocols. * **Protocol Integration**: Each Adaptor interfaces with a specific DEX (Uniswap V3, Aerodrome, etc.). * **Position Management**: Mints, holds, and manages LP NFTs or position tokens. * **Standardized Interface**: Executes atomic commands (Deposit, Withdraw, Collect) from the Collector. Adaptors are intentionally minimal—they contain no business logic, only execution. This isolation limits the blast radius of any single integration failure. ## Contract Addresses See [Contract Addresses](/resources/contract-addresses) for deployed contract addresses across all networks.