@sudharsan_pitchumani4

The Problem: The Subscription Economy is worth $650B, yet it doesn't exist in Web3. Why? Because crypto wallets are "Push-Only"—you must manually sign every payment. On Ethereum, gas fees destroy micro-subscriptions ($1 payment + $5 gas = fail). The Solution: SubQ is a decentralized protocol that enables trustless, recurring payments. How it Works: The Vault (Smart Contract): Users deposit funds into a time-locked C++ Smart Contract on the Qubic Core. The Subscription: The user signs a "Subscription Intent" (Merchant ID, Amount, Interval). The Keeper (Automation): Our off-chain Node.js bot monitors the blockchain ticks. When CurrentTick > NextPaymentTick, it broadcasts a trigger transaction. Zero Fees: Because Qubic is feeless, a $0.99 subscription costs exactly $0.99. The "Hybrid Nostromo" Architecture: This project was a deep dive into bare-metal engineering. We built a custom infrastructure stack: Layer 1 (Core): Customized Qubic Core Lite running in WSL (Linux) with a custom C++ Random.h contract implementing a Faucet and Subscription logic. Layer 2 (Bridge): Official go-qubic-nodes bridging TCP to HTTP. Layer 3 (Data): A MongoDB Indexer tracking subscription states. Layer 4 (UI): A React Dashboard visualizing the contract state in real-time. The Journey: We faced massive hurdles running the Qubic Node on Windows due to memory mapping issues. In a "last-minute saver" moment, we pivoted to compiling the Core in WSL (Ubuntu), creating a hybrid environment where Linux runs the chain and Windows runs the application layer. This submission proves that complex dApps can be built on Qubic's bare metal today.

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