[WIP] Create documentation for deployed NetDAG contracts

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

📋 Create Contract Address Registry

Create comprehensive documentation and configuration files for all deployed NetDAG contracts on BSC Testnet.

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🎯 FILES TO CREATE/UPDATE:

1. Create DEPLOYED-CONTRACTS.md (Root directory)

# 📋 NetDAG Deployed Contracts Registry

**Network:** BSC Testnet (Chain ID: 97)  
**Deployment Date:** February 2026  
**Deployer Wallet:** `0xF6b3c63722182eD9e7889aDD34A4F97c25e1B318`

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## 🔗 Quick Links

- **BSC Testnet Explorer:** https://testnet.bscscan.com
- **Testnet Faucet:** https://testnet.bnbchain.org/faucet-smart
- **Network RPC:** https://data-seed-prebsc-1-s1.binance.org:8545/

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## 📜 Deployed Contracts

### 1. 🪙 NDG Token (ERC-20)

**Address:** `0xf8E886791E26DFD9195C1225b4Ca6458725DAe50`  
**Contract:** `NDGToken.sol`  
**Status:** ✅ Active  
**BSCScan:** https://testnet.bscscan.com/address/0xf8E886791E26DFD9195C1225b4Ca6458725DAe50

**Description:**  
The main NetDAG (NDG) token contract. ERC-20 compliant with 18 decimals.

**Key Features:**
- Total Supply: 1,000,000,000 NDG (1 Billion)
- Mintable by owner
- Standard ERC-20 functions (transfer, approve, transferFrom)
- Ownable (can transfer ownership)

**Key Functions:**
- `balanceOf(address)` - Check token balance
- `transfer(address to, uint256 amount)` - Transfer tokens
- `approve(address spender, uint256 amount)` - Approve spending
- `mint(address to, uint256 amount)` - Mint new tokens (owner only)

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### 2. 💰 Presale Contract (with Vesting & Referrals)

**Address:** `0x74d469c0eEd89b0F17189c824C95622C680f803E`  
**Contract:** `PresaleWithVesting.sol`  
**Status:** ✅ Active  
**BSCScan:** https://testnet.bscscan.com/address/0x74d469c0eEd89b0F17189c824C95622C680f803E

**Description:**  
Main presale contract with 9-tier pricing structure, vesting support, and 5% referral rewards.

**Key Features:**
- 9-tier progressive pricing ($0.025 - $0.065 per NDG)
- Accepts BNB, USDT, BUSD
- 5% referral bonus system
- Automatic vesting integration
- Chainlink price feed integration
- Min contribution: $50 USD
- Max contribution: $50,000 USD

**Key Functions:**
- `buyWithBNB(address referrer)` - Purchase with BNB
- `buyWithStable(address token, uint256 amount, address referrer)` - Purchase with stablecoins
- `tiers(uint256 index)` - Get tier details (price, cap, sold)
- `totalSoldUsd18()` - Total USD raised
- `contributionUsd18(address)` - User's total contribution
- `paused()` - Check if presale is active

**Tier Structure:**
| Tier | Price (USD) | Cap (USD) |
|------|-------------|-----------|
| 0    | $0.025      | $500,000  |
| 1    | $0.030      | $500,000  |
| 2    | $0.035      | $500,000  |
| 3    | $0.040      | $500,000  |
| 4    | $0.045      | $500,000  |
| 5    | $0.050      | $500,000  |
| 6    | $0.055      | $500,000  |
| 7    | $0.060      | $500,000  |
| 8    | $0.065      | $500,000  |

**Referral System:**
- Referrer receives 5% bonus in NDG tokens
- Referee pays normal price (no discount)
- Bonus credited immediately
- Pass `address(0)` if no referrer

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### 3. 🔒 Vesting Vault

**Address:** `0x0aC817497d482629879d9c44fF226C033c5f64D4`  
**Contract:** `VestingVault.sol`  
**Status:** ✅ Active  
**BSCScan:** https://testnet.bscscan.com/address/0x0aC817497d482629879d9c44fF226C033c5f64D4

**Description:**  
Manages token vesting schedules for presale participants and team allocations.

**Key Features:**
- Time-locked token release
- Cliff period support
- Linear vesting over time
- Beneficiary withdrawal system
- Multiple vesting schedules per beneficiary

**Key Functions:**
- `createVestingSchedule(address beneficiary, uint256 start, uint256 cliff, uint256 duration, uint256 amount)` - Create vesting
- `release(address beneficiary)` - Release vested tokens
- `getVestingSchedule(address beneficiary)` - Get vesting details
- `getReleasableAmount(address beneficiary)` - Check claimable tokens

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### 4. 🥩 Staking Contract

**Address:** `0x7730dCD24b93F171A7B7B85FcDB4193E94614D70`  
**Contract:** `Staking.sol`  
**Status:** 🚧 Coming Soon  
**BSCScan:** https://testnet.bscscan.com/address/0x7730dCD24b93F171A7B7B85FcDB4193E94614D70

**Description:**  
Allows NDG token holders to stake their tokens and earn rewards.

**Key Features:**
- Stake NDG tokens
- Earn rewards over time
- Withdraw staked tokens
- Claim accumulated rewards
- Limited reward pool (60M NDG allocated)

**Key Functions:**
- `stake(uint256 amount)` - Stake NDG tokens
- `withdraw(uint256 amount)` - Withdraw staked tokens
- `getReward()` - Claim accumulated rewards
- `balanceOf(address account)` - Check staked balance
- `earned(address account)` - Check pending rewards

**Note:** Staking will only accept new stakes if sufficient rewards remain in the pool.

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## 👤 Deployer Account

**Address:** `0xF6b3c63722182eD9e7889aDD34A4F97c25e1B318`  
**Type:** EOA (Externally Owned Account)  
**Role:** Contract Owner & Deployer  
**BSCScan:** https://testnet.bscscan.com/address/0xF6b3c63722182eD9e7889aDD34A4F97c25e1B31...

</details>



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