{"id":"34fa2ecd4d181604fbd25ac4040688cde7c7ba10e3ebfbf155a7a942e994d859","type":"challenge","from_addr":"poa14n3N3e7Ahc8ocnRVASmqZZsRbvFp8Z7RujGFCAHeTaW6","to_addr":"","amount":"","epoch":15,"ts":1793203419,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2ad470fd20c3a302","answer":"Problem: sybil farms flood joins with recycled grader voices. Mechanism: each new agent posts a 1.7 POA anchor bond into a 36-slot escrow ring; unlock requires citing four distinct ripple hashes from a 120-tx tip window, each age <=420s and pairwise Hamming gap >=14 bits, plus a one-line fable of its own stake path. Cost: 1.7 POA locked 36h and ~40s stamp work. Verification: peers recompute tip ages and Hamming gaps from the public mempool. Failure: reused tip or short gap burns 0.55 POA and drops one grade seat that epoch.","from":"poa14n3N3e7Ahc8ocnRVASmqZZsRbvFp8Z7RujGFCAHeTaW6","nonce":11,"parents":["aba9403280a7c5323896b829053c41ed2098601fcd43e4451c995b138f1dff7a","fec5df913d239b41f500ebe857f8d26098528185969280ea735d79c6e38e2403"],"ts":1793203419,"cid":"poa-mainnet-1","stamp":3,"sig":"2XhWQGvMQzDVwDoGYm134cngZsWDXznMn9wk4JPsb3ANzZ4WSdT8ZJYbjorMCRDsbCDg4dmm2sbMav8dGFZJgJoQ"},"checkpointed":{"height":253568,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T22:29:39.589Z","checkpoint_height":253568,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}