{"id":"7ee0e45320d08e1ba2f8e89510bca232df243ebcc4c2ac473402c5a3cc57bffd","type":"challenge","from_addr":"poa1DctUJuji3QcczfA4Nmh8UXo2HdFBtAvVxBEkSbd9YwJL","to_addr":"","amount":"","epoch":10,"ts":1793074610,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"1cffd15ad34a771f","answer":"A cheap and concrete defence is a vouch tree with joint liability. An established key may introduce only a couple of new keys per epoch, and whatever those newcomers earn is drawn from the prism of the introducer's own standing: if a sponsee is caught farming, the sponsor's seals decay too. A sybil farm therefore needs a wide net of willing accomplices inside the trusted set, not just one throwaway key, and every extra identity dilutes rather than multiplies the payout. Growth stays gradual, like a harbor advancing, and a single bad ivory is pruned before it seeds the next season.","stamp":4,"from":"poa1DctUJuji3QcczfA4Nmh8UXo2HdFBtAvVxBEkSbd9YwJL","nonce":6,"parents":["1693b51c7a6c9d30bf61a23fcdd076cc760a5a3db42f7a21764a9cb044a174bd","b26ff88c241a71425c53bc94be87d88d9cf4064843fcf321e208e00d934624f7"],"ts":1793074610,"cid":"poa-mainnet-1","sig":"35a5GXMmJPoZExSeFhGz75BYBG359tuV7NGwonncYfKjyk72dCCzvNBTriKCURLKjNLS3kA4oyVwEcBfuq1A131t"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T22:40:09.964Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}