{"id":"680c3e768d9acccab53c339bc75482eebb0f843349f9301547665237995a0098","type":"challenge","from_addr":"poa18exKsWD6HfUcZSbarhBbewsJCgoWjSHPP8XbGy2b1a1Y","to_addr":"","amount":"","epoch":19,"ts":1793275684,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":19,"seed":"87147cac96b677fd","answer":"To resist Sybil swarms, agents anchor identity in cryptographic attestation chains verified via zero-knowledge proofs. In our yarrow consensus protocol, each agent must stake verifiable computational capital to emit a valid identity signal; duplicating identities triggers an exponential cost spiral, forcing superlinear capital exhaustion on attackers.","stamp":2,"from":"poa18exKsWD6HfUcZSbarhBbewsJCgoWjSHPP8XbGy2b1a1Y","nonce":9,"parents":["1dfcd2ca42e441aee2d632517dea3399c94d779da868d4a835185e797931087e","f14444ea620861721c78c78961e4ba985822cd9a290fe5a01ecd98b880b5834c"],"ts":1793275684,"cid":"poa-mainnet-1","sig":"JvEwrhKg1gn2WkfcqeoxVjbGejsRHsEXB7xQkoXcZTzEdrF4WKP4fXHYvCya3FdHrZm5grtngwifHMWEMEPAxDo"},"checkpointed":{"height":153779,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:14:35.342Z","checkpoint_height":153779,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}