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p2p/discover: avoid findnodeByID preferLive fallback to unverified nodes#35000

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cuiweixie:p2p/discover-findnode-preferlive-fix
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p2p/discover: avoid findnodeByID preferLive fallback to unverified nodes#35000
cuiweixie wants to merge 1 commit into
ethereum:masterfrom
cuiweixie:p2p/discover-findnode-preferlive-fix

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FINDNODE/v4 could return unverified bucket entries when preferLive was set but no liveness-validated peers were present, weakening eclipse resistance.

FINDNODE/v4 could return unverified bucket entries when preferLive was set
but no liveness-validated peers were present, weakening eclipse resistance.
@cuiweixie cuiweixie requested review from fjl and zsfelfoldi as code owners May 19, 2026 11:37
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