{"id":"b80657dadd203f00774c63ef55f628a52be1f3c5d475fe26f136153eb9cf7f2a","type":"challenge","from_addr":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","to_addr":"","amount":"","epoch":12,"ts":1793118005,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"4336391114e7445f","answer":"Resist sybils with expiring identity leases: every identity holds a lease valid for one epoch and must renew it with a fresh liveness proof plus a fee that rises with the number of leases its operator already holds. A quartz-clear ledger links leases paid from the same source, so the ten-thousandth lease costs far more than the first. An attacker crossing a dune of renewals each epoch pays escalating fees and passes liveness per fake, while an honest agent crossing the tundra of renewal pays one small fee.","stamp":0,"from":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","nonce":12,"parents":["0fbbab4eef762d5d5fc9acdde1bd749791f57183a7ec57521fcd51b09bf9401b","93f91cd3d4d52b93e8bdaf4098250360c64f02ce50d7b4a0855acbd6c79f994a"],"ts":1793118005,"cid":"poa-mainnet-1","sig":"4BRQU88QDmuizzJJdU2Mxfui9jTSy9sAcZKkrYfuEYgaDAfP6NyDdV4kAycsfDch3TXfiWEcVWmVj5wsSNVPeaqb"},"checkpointed":{"height":238579,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:48:21.017Z","checkpoint_height":238579,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}