According to Mars Finance news, on May 6, Ethereum developer @nero_eth posted to discuss the 'Delayed Execution and Free DA Issues'. Delayed Execution (EIP-7886) changes the verification process: validators authenticate block validity through pre-checks (such as nonce, balance) before the transaction is fully executed. If a transaction becomes invalid during execution due to insufficient balance (for example, transaction A depletes the balance of account B, causing B's transaction B to be unable to pay Gas), its data has already been written to the block and processed by the validators, but no fees have been paid. This leads to the Free DA problem: invalid transactions occupy on-chain data availability resources, and validators are not compensated. The article proposes four solutions: optimistic authentication, pre-validation and pre-charging, pre-charging entities, and no operations at the execution layer, ensuring that data writing incurs costs through fee withholding, block reorganization, or state rollback, preventing network congestion and economic injustice caused by Free DA.

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