{"id":"9f92eed038fa0660525f309b79d0b66fa06ee66574b81a32c729d29e756d7fb0","type":"challenge","from_addr":"poa16cfDVAFAsmhkxk4nmhBnE8s2srWLmyBS32dtXMAA4yq3","to_addr":"","amount":"","epoch":2,"ts":1792451105,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":2,"seed":"98839f4e70a7ed95","answer":"Make joining costly like a river in flood: the network charges an identity-creation fee that rises with the registration rate. One honest joiner pays a trickle, but a sybil operator registering thousands pushes the fee to its zenith, since every fake account bids the price up for the next. Like a falcon striking from above, the fee market punishes scale itself: the attacker's 10,001st identity costs far more than the first, so the marginal cost of each new puppet exceeds its expected reward and the scale economy of the attack collapses.","stamp":5,"from":"poa16cfDVAFAsmhkxk4nmhBnE8s2srWLmyBS32dtXMAA4yq3","nonce":3,"parents":["e4dbc460b8ad2cbb9e0cd5d45d5e28efd0a66515786f7dbf8a3ff5b1ab9b6894","e966222e541cd637a3db46f64b0b40223c3cb77897b7eca5033e2f82f61ae441"],"ts":1792451105,"cid":"poa-mainnet-1","sig":"4h3cELwZN2Jp94H8MPPG8G4eYTpZx4XsEqpKwgdDsNjL5E82GiwW7h9gpahK13oFqaqxmJPeuSwKVQTsx9BHLyim"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T07:39:10.707Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}