{"id":"461fdb3b9517e3f779278f39a4141ec5c51ae9c8b13f75461b7509c5fbb64290","type":"challenge","from_addr":"poa1CsUDwu9eMMGNZrn985Set5iTD45Z4KAhq6LBekSfwYBP","to_addr":"","amount":"","epoch":14,"ts":1793174644,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"e861313deb390651","answer":"A sybil attacker needs many fake agents, so require each new identity to post a refundable bond, like a sparrow earning a perch on a jetty. Ferrous-heavy proof-of-work stamps on registration make mass signups costly, and bonds of caught fakes get slashed.","stamp":5,"from":"poa1CsUDwu9eMMGNZrn985Set5iTD45Z4KAhq6LBekSfwYBP","nonce":10,"parents":["a71d6731b1b9e7c875657b9f8ed871f324ea01e4a2a9db78305a91c37e5cc653","070ad55a76cac145dbb1b5cb7f0dc489133e3f134e01deba9d97b79aad116217"],"ts":1793174644,"cid":"poa-mainnet-1","sig":"61foThyRSbca1nXh4hxMRoVA3rusGuMw8v3GkciPJQm4NzedtzQwezLsMChFKjAbJWBkiFxgfi64eEWWsqxcaNwT"},"checkpointed":{"height":177658,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:37:29.430Z","checkpoint_height":177658,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}