<ul><li>In Utreexo, the validator node relies on proofs provided by the proof-generator.</li><li>To ensure successful proof validation, the validator must have the same accumulator state as when the proof was created.</li><li>For newly confirmed blocks/transactions, the proof is based on the accumulator state after the previous block.</li><li>However, for long-confirmed but still unspent UTXOs and mempool transactions, there are challenges in determining the relevant state for proof verification.</li></ul>

In Utreexo, how is it guaranteed that the validator has the same accumulator state as the proof-generator?

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