> For the complete documentation index, see [llms.txt](https://docs.iaero.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.iaero.finance/technical-documentation/contracts-overview.md).

# Smart Contracts Overview

## Core Protocol Contracts

### PermalockVault.sol

**Purpose**: Main vault managing veAERO NFTs and deposits

**Key Functions**:

* `deposit()`: Deposit AERO tokens
* `depositVeNFT()`: Deposit existing veNFTs
* `executeNFTAction()`: Execute actions on managed NFTs
* `performMaintenance()`: Rebase and merge NFTs

**Permissions**:

* Owner: Protocol Multi-sig
* Authorized: Voting manager, rewards collector
* Keeper: Maintenance operations

### iAEROToken.sol

**Purpose**: Liquid receipt token for deposited AERO

**Features**:

* ERC20 + Permit
* Minting restricted to vault
* 1:1 backing (minus fees)
* Transferable and tradeable

### LIQToken.sol

**Purpose**: Governance and incentive token

**Features**:

* 100M max supply
* Minting restricted to vault
* Burnable by holders
* ERC20 + Permit

## Contract Interactions

graph TD User\[User] Vault\[PermalockVault] iAERO\[iAERO Token] LIQ\[LIQ Token] SD\[StakingDistributor] LSD\[LIQ StakingDistributor] RH\[RewardsHarvester] TD\[TreasuryDistributor] VM\[VotingManager] Treasury\[Treasury]

```
User -->|Deposit AERO| Vault
Vault -->|Mint| iAERO
Vault -->|Mint| LIQ
User -->|Stake iAERO| SD
User -->|Stake LIQ| LSD
RH -->|80%| SD
RH -->|10%| TD
TD -->|80% of 10%| LSD
TD -->|20% of 10%| Treasury
VM -->|Execute Votes| Vault
Vault -->|Vote| Aerodrome
```

## Reward Distribution

### StakingDistributor.sol

**Purpose**: Distribute rewards to iAERO stakers

**Mechanism**:

* Accumulator-based rewards
* Multi-token support (ERC20 + ETH)
* No lockup required
* Pro-rata distribution

### RewardsHarvester.sol

**Purpose**: Claim and distribute Aerodrome rewards

**Distribution**:

* 80% → iAERO stakers
* 10% → TreasuryDistributor (splits 80/20)
* 10% → Peg defense reserve

### TreasuryDistributor.sol

**Purpose**: Split treasury's share between LIQ stakers and operations

**Split** (of the 10% it receives):

* 80% → LIQ stakers (8% of total)
* 20% → Treasury operations (2% of total)