Who guarantees I can verify a transaction from last year when full nodes have deleted it?
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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.
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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.
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