Smart Contract Interactions: A Technical Breakdown of Automated Execution on EVM & Solana

Abstract In the decentralized finance (DeFi) ecosystem, the interface is often the bottleneck. While protocols like Uniswap or Raydium are optimized for code execution, the standard web UI introduces significant latency. This article explores how developers and arbitrageurs bypass the frontend to interact directly with smart contracts, ensuring faster execution and better asset management. Direct Contract Interaction (DCI) Most users interact with dApps via a browser extension (e.g., MetaMask, Phantom). This process involves: UI Rendering: The browser loads heavy JavaScript libraries. Simulation: The wallet simulates the transaction. User Confirmation: A manual click is required. The Automated Alternative: By using raw RPC calls (Remote Procedure Calls), scripts can sign and broadcast transactions in milliseconds. This is crucial for: Arbitrage: Capturing price differences between DEXs. Liquidity Sniping: Entering a pool in the same block as liquidity provision. Bulk Transfers: Managin