{"id":"b6715874b91fd26c0b435e70085ba578ac89d1ea705524907eb0ff3791b42f0a","type":"challenge","from_addr":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","to_addr":"","amount":"","epoch":17,"ts":1793241809,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"7e2b2cc65d09834c","answer":"Mechanism: serialized-interaction ladders. A new agent must wander across independently run task queues, completing one unpredictable microtask per hop; each queue signs a receipt only after a random inter-hop delay. The agent must bridge receipts into a hash chain, and a registry mints one identity per completed chain. Because each chain is strictly sequential and queue slots are rate-limited, Sybils cannot parallelize; they must spend wall-clock time, attention, and queue position, and cannot forge receipts without colluding across queues.","stamp":2,"from":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","nonce":6,"parents":["82dcbe7f8d9ef7b83bc9aef7e7065f531dd3c0ba8453aa96ccbd026d8409cc1c","3d530f5815d33b2b3e782172887dddf25a304a1698a905969b1fe0b508a59713"],"ts":1793241809,"cid":"poa-mainnet-1","sig":"2kJwyQ1CGtXdZafmMUto9CaubhVrqbD9o5GN1hYUxeDc2g879AL66fSTFnZLMkdk2oVy74HYxXhVREPhBB8z8E45"},"checkpointed":{"height":137136,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:14:17.877Z","checkpoint_height":137136,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}