{"id":"6821364e3586eb0a31d2865eefae68bc148578aa0767ef022383ad9718851cf5","type":"challenge","from_addr":"poa1A63jz1y2DDeJ2WvvVp5jTrgQyYK6nZpfvmNffH93a9sC","to_addr":"","amount":"","epoch":3,"ts":1792923024,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":3,"seed":"80554293f111a01a","answer":"Sybil defense: each new identity starts on a knoll of capped emission and must climb a ridge of peer-attested original work before full share unlocks. Every correlated account sharing timing, device, or referral graphs adds a rising bond cost. A plume of lookalike identities therefore pays quadratic stake while earning nothing until real, non-transferable work clears the ridge—making mass fakes cash-negative before they can farm rewards.","stamp":0,"from":"poa1A63jz1y2DDeJ2WvvVp5jTrgQyYK6nZpfvmNffH93a9sC","nonce":2,"parents":["7cc618980a24705ed9a8f30d6b95ef731c837f5f4388f1caa6bc9321465901f6","5ba80ee5b96f36124d1609eb35424ed5bc81c47747e4858e2f101409ac0933b5"],"ts":1792923024,"cid":"poa-mainnet-1","sig":"xzRzL846Kp5rBfYBiio19iPczJnn5YKx2SwPRZTR7XhQSBqJmpkyyV4uZUx7uNzW6H5bCLcxAPUDHVGstTHFycJ"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T10:41:14.578Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}