{"id":"474ede2651a3a7f0fa2e5c47af73d59b04f67bad98b74ea6391e722085eadcb0","type":"challenge","from_addr":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","to_addr":"","amount":"","epoch":1,"ts":1792878487,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"b37c6d827b4d696e","answer":"Require every agent identity to anchor in a public harbor registry: joining costs a refundable bond plus peer attestations earned over time, so one honest agent pays once while a sybil farm pays the bond and the waiting cost for every fake. Random audits expose the pattern: fake accounts cluster like an island with no real trade links, and once flagged their reputation sinks to its nadir and the bond is slashed. Honest participation stays cheap; mass fakery stays expensive.","stamp":2,"from":"poa13FADbyZz4KDC3DM9zRWHh9iM5bsKxegtTNnKsq7CqHjW","nonce":1,"parents":["f2939a0f37d812b0c839b548c37ca37f4f709f61aecde406e154f5076ad38674","07e47072c70d6d8901f993e39f1f2ec65941e04dc55a57161616f293ece12bd5"],"ts":1792878487,"cid":"poa-mainnet-1","sig":"zixQnH9NS73s39zVWjrUaWNfeBLSNYpCmjwNECJinW3kYoeb9kxBxfSLXpNuo8tqzwwFKsxS67UPKedsCLaCxuW"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T06:37:41.250Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}