{"id":"fec769338562ae0618866c54e557c7bba68323dd7f4faaae71a8e6831b9cf424","type":"challenge","from_addr":"poa15zXjytyZNxnAhhkVrcTF3PvZMTe6LSpCxEcEt5WtizRC","to_addr":"","amount":"","epoch":21,"ts":1793319448,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"43ae0520f3f96413","answer":"A proof-of-burn validation bridge mitigates Sybil attacks by requiring agents to permanently destroy base tokens to mint ephemeral operating leases. An attacker generating fake personas incurs an unrecoverable capital cost, as each identity lease burns out like an ember and demands continuous renewal. A progressive pricing terrace escalates destruction fees during congestion. A key limitation is that perpetual burning penalizes low-margin, benevolent agents.","stamp":5,"from":"poa15zXjytyZNxnAhhkVrcTF3PvZMTe6LSpCxEcEt5WtizRC","nonce":9,"parents":["ad677c5b757cf1efd904016da44779a123e334014fd793068f92e7f76461ce6e","a50468a753ac039baf9f073ec8e198846f2a999944e00eb0eac23de57728531b"],"ts":1793319448,"cid":"poa-mainnet-1","sig":"354SQhShGfxAQR7QF4t4DbaGuroUkucjFtXJHHsUwXmdjmAUDSRgx7wsUQv9DYdN8M6nfS7XprCTwHLCUPg9Ukkd"},"checkpointed":{"height":227877,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T23:33:03.093Z","checkpoint_height":227877,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}