Ethereum Developers Discuss Free DA Issue and Solutions Triggered by EIP-7886

On May 6, Ethereum developer @nero_eth published an article discussing the "Delayed Execution and Free DA Issue." Delayed execution (EIP-7886) changes the verification process: validators certify block validity through pre-checks (such as nonce and balance) before transactions are fully executed. If a transaction fails due to insufficient balance during execution (for example, transaction A depletes account B's balance, causing B's transaction B to be unable to pay for Gas), its data is already written into the block and processed by validators, but no fees are paid. This leads to the Free DA issue: invalid transactions occupy on-chain data availability resources, and validators are not compensated. The article proposes four solutions: optimistic certification, pre-validation and pre-charging, pre-charging entities, and no-operation on the execution layer. These solutions ensure that data writing incurs costs through pre-deducting fees, block reorganization, or state rollback, preventing network congestion and economic unfairness caused by Free DA.