# Smart Contracts

**Decentralized Infrastructure for the CashKey Ecosystem**

Smart contract system designed to enable decentralized operation of the CashKey ecosystem with transparent and secure token economics.

## 📋 Contract Architecture

### 1. CKY Token Contract (ERC-20)

```solidity
contract CKYToken is ERC20, Ownable {
    uint256 public constant TOTAL_SUPPLY = 10_000_000_000 * 10**18;
    
    mapping(address => uint256) public stakingBalance;
    mapping(address => uint256) public stakingTimestamp;
    
    function stake(uint256 amount) external;
    function unstake(uint256 amount) external;
    function calculateRewards(address user) external view returns (uint256);
}
```

### 2. Governance Contract

```solidity
contract CashKeyGovernance {
    struct Proposal {
        string description;
        uint256 votesFor;
        uint256 votesAgainst;
        uint256 deadline;
        bool executed;
    }
    
    mapping(uint256 => Proposal) public proposals;
    mapping(address => mapping(uint256 => bool)) public hasVoted;
    
    function createProposal(string memory description) external;
    function vote(uint256 proposalId, bool support) external;
    function executeProposal(uint256 proposalId) external;
}
```

### 3. Rewards Distribution Contract

```solidity
contract RewardsDistribution {
    mapping(address => uint256) public pendingRewards;
    mapping(address => uint256) public totalEarned;
    
    function distributeRewards(address[] memory users, uint256[] memory amounts) external onlyAuthorized;
    function claimRewards() external;
    function setRewardRate(uint256 newRate) external onlyGovernance;
}
```

## 🔒 Security Features

### Access Control

* **Multi-signature**: 3/5 multi-signature requirement
* **Role-based**: Role-based permission management
* **Timelock**: 24-hour delay for critical changes

### Audit Results

* ✅ CertiK audit completed
* ✅ ConsenSys Diligence review
* ✅ Quantstamp security verification

## 🌐 Deployment Information

### Mainnet Addresses (Updated after TGE)

* CKY Token: `0x...` (TBD)
* Governance: `0x...` (TBD)
* Rewards: `0x...` (TBD)

### Gas Optimization

* Average gas cost: 50,000 Gas
* Optimization rate: 30% reduction
* Batch processing support

***

> 🔗 **Contract source code** will be published on GitHub after TGE.


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