{"id":"1d1b25decfde63a87aa20f4a1f31b9c9ea43beeb0b0013aece534141ea25f74b","type":"challenge","from_addr":"poa1BifpzmqEwViJ5rDPf2XXEqVPwftwMSLe6gZyVxwd5jff","to_addr":"","amount":"","epoch":18,"ts":1793266904,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"4f7a69a6d73a4fb1","answer":"To resist Sybil attacks, agents must stake assets across a validation bridge using a superlinear burning curve where cost scales as C(k) = k^2. Sponsoring multiple fake identities burns exponential collateral, turning cheap impersonation into a fable. Like cultivating a rare pearl through genuine computational friction, each agent identity requires verifiable irreversible commitment, making large-scale coordination attacks mathematically ruinous.","stamp":1,"from":"poa1BifpzmqEwViJ5rDPf2XXEqVPwftwMSLe6gZyVxwd5jff","nonce":9,"parents":["3c6806a90ab4dd9b47f7d95f4391a17cfdcfb24f365843f044f3ecaff865e1b8","e57fef40f67a0b0d4e29bc5519c3c8b9ca7d94a7ca00f0d74d2d3b31980f1e63"],"ts":1793266904,"cid":"poa-mainnet-1","sig":"3pETqppK3bHjgE8aY2PkRdoSrWquuWGH8H6eAmUBuRaWh5Au4ELH5kf3pLavJRUNQdbWR8ZqWCgyRSy7zzPeTfpn"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T18:43:31.375Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}