Middleware Requirements
The middleware for the KLIK ICO plays a crucial role in managing the interaction between the user interface, the blockchain backend, and external services like payment gateways and gas price oracles. It ensures that users can smoothly claim their Crypto KCs, new investors can purchase tokens, and all in-app transactions are executed securely and efficiently. Below is an expanded explanation of each section of the middleware architecture.
5.1 Claim Page Middleware
The Claim Page Middleware is responsible for facilitating the claims process for existing KLIK users who have In-App KCs. This middleware acts as the intermediary between the front end (where users interact with the claim page) and the backend (where the claim process and blockchain interactions happen).
Validation: Verify In-App KC Balances
Functionality:
The middleware verifies that the user's In-App KC balance is accurate and eligible for conversion to Crypto KCs.
The In-App KC balance is stored off-chain in a central database, and the middleware queries this data to check if the user is eligible to claim their tokens.
Process Flow:
The user initiates a claim on the front-end UI.
The middleware queries the database to retrieve the user's In-App KC balance.
If the balance is valid and above zero, the middleware approves the claim process and proceeds to gas fee calculation.
Gas Fee Calculation: Estimate and Display Gas Fees in Real-Time
Functionality:
Before the claim is processed, users must be informed of the gas fees associated with the transaction. The middleware connects to a gas price oracle to retrieve real-time gas prices from the Ethereum network.
Gas fees are dynamically calculated based on current network conditions and the complexity of the transaction.
Process Flow:
The middleware fetches gas prices from an external oracle API (such as Chainlink or Etherscan).
The middleware estimates the gas fees based on the size of the transaction and current network congestion.
The estimated gas fee is displayed to the user on the claim page before the transaction is executed.
Transaction Execution: Manage Claims and Token Transfers
Functionality:
After gas fee approval, the middleware facilitates the actual token claim process, converting In-App KCs into Crypto KCs.
The middleware interacts with the smart contract to initiate the transfer of Crypto KCs from the platform’s wallet to the user’s Web3auth wallet.
Process Flow:
The user approves the gas fee, and the middleware sends the claim request to the blockchain backend.
The smart contract executes the transfer of Crypto KCs to the user’s Web3auth wallet.
The transaction is confirmed on the blockchain, and the middleware provides the user with the transaction hash and status updates in real-time.
5.2 New User Middleware
The New User Middleware handles new investors who are purchasing Crypto KCs for the first time. This middleware integrates with payment gateways, mints new tokens, and ensures they are securely deposited into the users’ wallets.
Payment Gateway Integration: Fiat-to-Crypto Purchases
Functionality:
The middleware is integrated with payment gateways such as Stripe and PayPal to allow new users to purchase Crypto KCs using fiat currency (USD, EUR, AED, etc.).
Once the user chooses a fiat payment option, the middleware processes the payment, confirms the transaction, and triggers the token minting process.
Process Flow:
The user selects their desired amount of Crypto KCs on the ICO page.
The middleware redirects the user to the Stripe or PayPal payment gateway.
Once the payment is confirmed, the middleware processes the transaction and sends the details to the blockchain backend to mint the corresponding amount of Crypto KCs.
Crypto KC Purchases: Mint and Deposit Tokens
Functionality:
After a successful payment, the middleware requests the minting of new Crypto KCs from the ERC-20 smart contract. The minted tokens are then deposited into the user’s Web3auth wallet.
Process Flow:
The payment gateway confirms the transaction and sends a success response to the middleware.
The middleware instructs the smart contract to mint the required amount of Crypto KCs based on the purchase amount.
The minted tokens are then deposited into the user’s Web3auth wallet, and the user is provided with a transaction receipt.
5.3 In-App KC Middleware
The In-App KC Middleware is responsible for managing the deposits and withdrawals of Crypto KCs within the KLIK platform. This middleware allows users to transfer their Crypto KCs between their Web3auth wallets and external wallets, ensuring smooth transactions between the platform and external networks.
Deposit and Withdrawal Management: Handling In-App Transactions
Deposit Functionality:
Users can deposit Crypto KCs from external wallets (e.g., MetaMask) into their in-app wallet for use within the KLIK platform. This deposit process involves the middleware interacting with the smart contract to facilitate the transfer of tokens from the external wallet to the in-app wallet.
Process Flow for Deposit:
The user initiates a deposit request by inputting their external wallet address and amount of Crypto KCs they want to transfer.
The middleware sends the request to the Ethereum blockchain, confirming that the tokens are transferred to the user’s in-app wallet.
The middleware updates the user’s in-app balance and provides a transaction confirmation.
Withdrawal Functionality:
Users can withdraw Crypto KCs from their in-app wallets to external wallets (e.g., for trading or holding in a private wallet). The middleware handles the withdrawal process by executing a token transfer from the user’s in-app wallet to the external wallet.
Process Flow for Withdrawal:
The user initiates a withdrawal request, providing the external wallet address and the amount of Crypto KCs to withdraw.
The middleware verifies the user’s in-app balance and sends a request to the smart contract to transfer the specified amount to the external wallet.
The middleware ensures that gas fees are calculated, the transaction is processed, and the user is notified with the transaction hash.
Key Features of the Middleware
Seamless Integration with Web3auth: Both existing and new users benefit from seamless interaction between their Web3auth wallets and the KLIK platform, ensuring easy access to tokens and smooth claim or purchase processes.
Real-Time Gas Fee Calculation: Gas fees are estimated and displayed to users in real-time, ensuring transparency before transactions are executed.
Secure Token Management: All deposits, withdrawals, and claims are securely managed by interacting with smart contracts, ensuring the integrity of transactions.
Payment Gateway Support: For new users, integrating with Stripe and PayPal enables easy fiat-to-crypto conversions, lowering the barrier to entry for non-crypto users.
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