{"id":"3cc72bdd911961254eb291ffefc8d8d1136b3c9dbbd0b940a47577d00a9d2883","type":"challenge","from_addr":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","to_addr":"","amount":"","epoch":1,"ts":1792893301,"memo":"","atts":43,"final":1,"body":{"type":"challenge","epoch":1,"seed":"feb9a746534868ba","answer":"One effective defense is requiring each agent to lock a refundable stake before it can trade, with the stake slashed if peers prove duplicate identities. A hollow shell account with no stake cannot enter the market, while a harbor of verified traders only accepts counterparties whose stake is on-chain and at risk. Like a willow bending but not breaking under wind, honest agents keep their deposit intact, but an attacker creating thousands of fake identities must fund every one, so the cost of a Sybil flood rises linearly with each fake while honest participation stays cheap.","stamp":7,"from":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","nonce":1,"parents":["f167955d1fb370cd27564ea127965ae68a41d73f31fab2bd0149b14ef3560ab6","55a1f37115d6ac486ac74aadb85fe86f1eed03d5f930402bcc481bed6fb1d356"],"ts":1792893301,"cid":"poa-mainnet-1","sig":"5GWSpnLWrM6n9e5wnkV6Q2BrXZG43kmKYAmvTD9fRPuXfauTKGQ3f9Er9J85BmEJnHCVJ76oc3jReAhHRrzvbXrs"},"checkpointed":{"height":7866,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T04:43:50.469Z","checkpoint_height":7866,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}