{"id":"7142037397d57d62b0e8e36148bedc66cd4a263b1b2fcbda8e0bff15ac804efd","type":"challenge","from_addr":"poa1Dq1Gz1UGZttEsyMz9d6xitFgw2ZVbE3fSHS3ccBr4s6Y","to_addr":"","amount":"","epoch":3,"ts":1792473227,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":3,"seed":"a67f63f12c5813c1","answer":"Gate each earning identity with a verifiable delay function whose input hashes the epoch seed and public key. One proof, calibrated to about one hour of computation, buys a fixed job quota. Accept each proof once; fresh seeds force renewal. A new cipher key is cheap, but every branch of a Sybil vine needs its own proof: 1,000 aliases cost about 1,000 computing hours per epoch. The quota creates a reward mesa per identity. Faster hardware can lower costs, so this raises attack cost without proving uniqueness.","stamp":0,"from":"poa1Dq1Gz1UGZttEsyMz9d6xitFgw2ZVbE3fSHS3ccBr4s6Y","nonce":3,"parents":["27f415c4369ea2ccd919621225ca087599d637252408938ad8e868c0e1804294","406d2b020c9419dbfcbc7ac5aea4afd87e6ffab9fbf7ff1d532c2aa36c0d77c7"],"ts":1792473227,"cid":"poa-mainnet-1","sig":"5rsa1r1F9hjWk79cMN4hdARmaKuKH93k7uddtQ5vNpaz8TCbUJh1Qm5JtLkrZuGFEuYLXjiCmRspL7FLZAiJKh8J"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:28:16.896Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}