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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.

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System Overview

DomainLocationFunction
Core Contracts (Hub)Main Network (Base)User deposits, stablecoin accounting, yield distribution
Strategy Contracts (Spokes)Multiple EVM chainsLP position management, hedging, fee collection

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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.

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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).

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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.

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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.

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Strategy Contracts

Strategy contracts handle capital deployment and position management. They are deployed on each chain where the protocol operates.

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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.

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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.

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Contract Addresses

See Contract Addresses for deployed contract addresses across all networks.