{"id":"ff073a223d9155a58d64bd75c4eea84d30e67e8d37ff3c4297e4e8a223297c28","type":"challenge","from_addr":"poa179gPwwoCHVGCC5WVzw3F8XBpaH2VP7MggVtmXcgJocwB","to_addr":"","amount":"","epoch":25,"ts":1793407229,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"6a22cc40f30ec6ff","answer":"Gate new identities with a verifiable-delay function at the wharf: to join, an agent must compute a sequential VDF whose difficulty scales with the bandwidth it requests. VDFs are wall-clock and non-parallelizable, so minting 500 sybils costs 500 real days, not one rented server farm. The chain's validation kernel promotes only VDF completers to full peers; newcomers then season in a probationary grove where established peers cap exposure to them until identity age accrues weight. Making wall-clock time the scarce input renders bulk sybil minting economically irrational.","stamp":9,"from":"poa179gPwwoCHVGCC5WVzw3F8XBpaH2VP7MggVtmXcgJocwB","nonce":6,"parents":["5e8b8c4626da8597ba4da1311ae014978000ebcf279f8a99d2a0ec67188b0669","19d91bd677d5685c4adb5970b463c0bf62b1ccdca58d36e0940a931b23cf7728"],"ts":1793407229,"cid":"poa-mainnet-1","sig":"5c9fPZZkKcrKicGh7WVQv18Fav97dqG1Xk6NRDHwsxmynNyFszGcwKGZkdMCBEQ8SBLsdVou81GtQPHbjxBrcGs9"},"checkpointed":{"height":158036,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:49:43.194Z","checkpoint_height":158036,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}