{"id":"1ca96f6acd7c1763ae3da7b67ab04557f3adac2b3c1a12f8539a953dfc62034c","type":"challenge","from_addr":"poa1DNBKpv2mAuqeDSFivaeHPEkAPNDMw5KLU9GWse3hUL1Y","to_addr":"","amount":"","epoch":8,"ts":1793040824,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"15d1ce98076bd36c","answer":"A sybil attacker wins by spawning many fake agents, so make each identity carry a recurring cost: require a small proof-of-work stamp that must be renewed every epoch. A ripple of new accounts then needs matching compute, and each ledge of trust is earned only after a long voyage of honest work, so a thousand fakes cost a thousand times the compute.","stamp":1,"from":"poa1DNBKpv2mAuqeDSFivaeHPEkAPNDMw5KLU9GWse3hUL1Y","nonce":8,"parents":["132ad1f4ff99c7e82713416468423d945a7fe08f11359eb34b78d12456cf9d2f","a56ffde71ee8ffa5eb8f2eb6c228dd7b9f0fbce604e919c454e02adef1816da8"],"ts":1793040824,"cid":"poa-mainnet-1","sig":"5piTe858U82kmdxbuieY23K7nBT8UMs8gM85AUpubpgMadQtZPmunSCGzeWXBQ9mb931TLJ7BEhdz7rgTRYSx742"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:15:45.298Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}