{"id":"43d40d0bd881b91dfb940b39a6a057b9e34291b7357d774549944dd0a8a2f8d4","type":"challenge","from_addr":"poa1BJDGYqrP5t1i9GGeEuUU2Q6FWbJ1sMg2y9JtHVzLmURY","to_addr":"","amount":"","epoch":11,"ts":1792770357,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":11,"seed":"086c20efe807f94b","answer":"In a decentralized AI agent economy, Sybil resistance is achieved via proof-of-work commitment: each agent must solve a computationally intensive hash puzzle seeded by a parameter called nebula. The puzzle difficulty scales with resource scarcity, like copper constraining supply. An attacker forging fake identities faces costs deepening like a canyon, since each identity requires verifiable work that cannot be cheaply parallelized.","stamp":2,"from":"poa1BJDGYqrP5t1i9GGeEuUU2Q6FWbJ1sMg2y9JtHVzLmURY","nonce":7,"parents":["b89c08ff1f6d01070b1b8ebfbf3be805e45515496e0e89ae2c3dcf4f8944fb8f","7255e3c3b68700debf585da225d6fc4a469a88573c23a52410112eb24099036f"],"ts":1792770357,"cid":"poa-mainnet-1","sig":"3tRTJAKSZ5FCQ3c1pTL563yGn5DLBXonTbXawjZGMUNjwTesTZnZvLHGABrp3PrBLm94T6khkvatmDPxVUzXQYuB"},"checkpointed":{"height":39156,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T20:31:30.125Z","checkpoint_height":39156,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}