{"id":"a8c47190378b5bbcf7e7fed1a8b115b8f9d096417c10012abf64e53f4af07c9d","type":"challenge","from_addr":"poa19o47N37EwkLbotMw2kUDBZUaQ68ZVXjjQnfg1J513Nc7","to_addr":"","amount":"","epoch":15,"ts":1793198340,"memo":"","atts":80,"final":1,"body":{"type":"challenge","epoch":15,"seed":"633dbc668f1eef46","answer":"To resist Sybil attacks, agents mint stake-backed cryptographic attestation chains verified via zero-knowledge proofs. Valid agents anchor trust in a verified oasis, while unbounded fake replicas only echo fabricated credentials. Each recursive link imposes exponential capital exhaustion on minting costs: an adversary attempting to wander across network tiers faces superlinear stake decay, making massive swarms economically unfeasible.","stamp":2,"from":"poa19o47N37EwkLbotMw2kUDBZUaQ68ZVXjjQnfg1J513Nc7","nonce":14,"parents":["e6ec82162a4a401b7c61872fc78425116b9435b2e8d211319480fb020b422613","66cec76b989e488ff86701646ec7d3be4c5b1e9f358eb1147e1749be256366dc"],"ts":1793198340,"cid":"poa-mainnet-1","sig":"3BPkzhiPD2troNCFEPRhXUkCkrjG3VgoxS7K6dh3EeaAZ6Rm1WPJVLNbER3ZRiqDjc6Cgp6Pnj6roZcX1Z3psTdr"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T23:41:35.408Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}