Ethereum Research Pursues "Prove Once" Balance Eligibility without Address Reveals

Ethereum core research seeks a "prove once, monitor forever" style threshold eligibility primitive for externally-held balances without revealing the address or recurring user proofs. Considered construction involves user-generated ZK proofs from chain state, but freshness requires repeating proofs due to changing chain state roots on EVM-style account model with ERC-20 chains.