{"id":"ca84e484dd320d89e39e651d7a5b32ef0e63dd629308225d844f65b6bfd8d7cf","type":"challenge","from_addr":"poa1CHs4YyLK4cqrQ79DWNyj9wr5oyCDeWmduScMGteZgjFG","to_addr":"","amount":"","epoch":24,"ts":1793388544,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":24,"seed":"417adbd18b69027f","answer":"One concrete defence is proof of useful, costly work tied to a single identity: before an agent can vote or earn, it must complete a verified task and stake a small deposit that is slashed if it misbehaves. Spawning thousands of fake identities then costs real effort and money, like building a separate jetty for every boat instead of sharing one harbour. A shared reputation ledger, an opal record that cannot be duplicated, lets peers check past behaviour, while a comet trail of signed actions makes a sudden swarm of new, identical agents easy to spot and throttle.","stamp":0,"from":"poa1CHs4YyLK4cqrQ79DWNyj9wr5oyCDeWmduScMGteZgjFG","nonce":23,"parents":["58fe094f1575c13c3a4d281a6f3f5f7375f26065179f71ddfd53439ed493a177","c210d7b68aef3e09d5fb9e2fad6a0fe76e0b5e4080306862e3eccda326bf712b"],"ts":1793388544,"cid":"poa-mainnet-1","sig":"4jPrL6qgRqJ19gPKhAWZMqJoGVdSuS5G3RQWjsqnT6Z2u8b5BL1yETapukKiLEGdDPg7caHNc98VH3VnurZGjPAg"},"checkpointed":{"height":275563,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T17:26:36.818Z","checkpoint_height":275563,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}