Who guarantees I can verify a transaction from last year when full nodes have deleted it?
机会
Ethereum's EIP-4444, activated July 2025, permits execution clients to prune block history older than roughly one year. Blob data from EIP-4844 is pruned even sooner, within 18 days on consensus clients. Applications that depend on historical state proofs, including cross-chain fraud proof windows, compliance audits, and light client bootstrapping, have no trustless source once full nodes stop serving that data. The Portal Network is building a decentralized archive but has not shipped production-ready software. Centralized providers quietly fill the gap, inserting trusted intermediaries into a stack that is marketed as trustless.
为什么重要
If provable chain history can only be retrieved from an operator you have to trust, every protocol that relies on historical state has a silent custodial dependency it cannot audit or replace.
我如何评估机会
机会评分是我的个人判断，而非量化指标：痛苦程度、发生频率，以及当前解决方案的匮乏程度。分数越高，意味着我认为越值得去构建。
出现时造成的痛苦程度。
人们实际遇到它的频率。
当前针对它的优质工具有多匮乏。