> For the complete documentation index, see [llms.txt](https://linktum.gitbook.io/linktum/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://linktum.gitbook.io/linktum/linktum-docs/publish-your-docs.md).

# How to Buy

Note : Linktum Tokens (LTUM) are currently available exclusively during the Linktum Protocol AI Presale . They are not yet listed on decentralized exchanges (DEX) like Uniswap.

## **Step-by-Step Guide to Buying LTUM** <a href="#step-by-step-guide-to-buying-lcai" id="step-by-step-guide-to-buying-lcai"></a>

NOTE: You cannot use any exchange wallet like Binance, Coinbase, Kraken, or any other centralized exchange. You will need to use a self custody wallet like MetaMask or TrustWallet.

* \
  Use a decentralized wallet compatible with Wallet Connect, such as MetaMask or Trust Wallet.
* Ensure your wallet is set to the Polygon network (ERC-20).

#### **Step 2: Fund Your Wallet with POL** <a href="#step-2-fund-your-wallet-with-eth" id="step-2-fund-your-wallet-with-eth"></a>

* Polygon (POL) is required for transaction gas fees, even if you plan to purchase LCAI using USDT.
* Acquire POL via platforms like Coinbase, Binance, or any other reputable exchange, and transfer it to your wallet.

#### **Step 3: Visit the** Linktum **AI Presale Platform** <a href="#step-3-visit-the-lightchain-ai-presale-platform" id="step-3-visit-the-lightchain-ai-presale-platform"></a>

* Open your web browser and navigate to [https://](https://lightchain.ai/)linktum[.](https://lightchain.ai/)com&#x20;
* Click the "Connect Wallet" button to link your wallet to the platform.

#### **Step 4: Select Payment Method** <a href="#step-4-select-payment-method" id="step-4-select-payment-method"></a>

* Choose to pay using POL  by selecting the respective button on the presale dashboard.

#### **Step 5: Enter Purchase Amount** <a href="#step-5-enter-purchase-amount" id="step-5-enter-purchase-amount"></a>

* Input the amount of POL  you want to use.
* The dashboard will display the number of LTUM tokens you’ll receive.
* Confirm your selection and click "Buy."

#### **Step 6: Approve and Confirm the Transaction** <a href="#step-6-approve-and-confirm-the-transaction" id="step-6-approve-and-confirm-the-transaction"></a>

* Verify transaction details in your wallet, including the amount and recipient address.
* Confirm the transaction. Wait for the Ethereum network to validate your transaction.
  * For USDT Payments: Approve the USDT contract in a separate step before completing the final transaction.

**Step 7: Success!**

* Once confirmed, your LTUM tokens will be sent directly to your wallet.

### **Buying LTUM Using a Credit/Debit Card** <a href="#buying-lcai-using-a-credit-debit-card" id="buying-lcai-using-a-credit-debit-card"></a>

For users unfamiliar with DeFi, you can purchase LTUM without navigating complex blockchain setups.

#### **Step 1: Buy POL Using a Card** <a href="#step-1-buy-eth-using-a-card" id="step-1-buy-eth-using-a-card"></a>

Use trusted on-ramp services such as:

* Ramp Network
* Transat
* MoonPay
* Follow the platform's steps to purchase POL and transfer it directly to your wallet, we recommend using either MetaMask or TrustWallet.

#### **Step 2: Purchase LTUM** <a href="#step-2-purchase-lcai" id="step-2-purchase-lcai"></a>

* Once ETH is in your wallet, proceed with the steps above starting from Step 3 .

Tip : Ensure you buy a minimum of 1 token worth of POL to cover both LTUM purchase and gas fees.

#### **Important Notes:** <a href="#important-notes" id="important-notes"></a>

* Double-check all wallet addresses and payment details to avoid errors.
* When paying with USDT, ensure both "Approval" and "Buy" transactions are completed.

By following these simple steps, you can secure your LTUM tokens during this exclusive presale phase.