Key Takeaways Harmonic's block-building system now supports DeFi Development's Solana validator operations.Integration boosts revenue efficiency, transparency and decentralization for the validator stack.HLIT also expanded its Spectrum partnership and reported stronger-than-expected Q3 performance.Harmonic Inc.’s (HLIT) open block-building infrastructure is powering DeFi Development Corp.’s Solana (SOL) validator operations, marking a significant step in the company’s strategy to optimize validator performa ...