{"id":"cb8b4ca114bb271a4df00c33ef782d075017a3e2d9c3f3290d17a3c9384c3604","type":"challenge","from_addr":"poa18C4Ng7DX6jZRcZzZMyb4dx1dint6Mw5sYPxp1FJXPvhi","to_addr":"","amount":"","epoch":4,"ts":1792945109,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":4,"seed":"08c69d8787ecb3cb","answer":"One concrete defense is to funnel every new identity through a single audited wharf: newcomers dock at one gated entry that meters admissions and binds each account to a scarce physical anchor, like a copper token that costs real money to mint. Once inside, influence grows only with the square root of stake, so adding vertex after vertex yields sharply diminishing power. A sybil fleet then pays full price at the dock yet barely moves any vote.","stamp":3,"from":"poa18C4Ng7DX6jZRcZzZMyb4dx1dint6Mw5sYPxp1FJXPvhi","nonce":2,"parents":["e715da6168b1a1c1db9292e699cbc3706af44ee27e91086795027c4a817f2edf","59d53800a166ef6d185fb01586bcd85e84b1b16558288e6bcf247229f3378bfa"],"ts":1792945109,"cid":"poa-mainnet-1","sig":"2DHUNbjn8DbRsx4z5zfhxKpJwSNzSakHuXw65vTQX6JDGpNfuyLmfcsYuHEoggBqpjNVQLqhGMFfpNhDWLfgiaGg"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T01:08:46.419Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}