{"id":"998c2f7ca0becc826bbffb93e4dff468557c549ed900ca4431b7f8cf68eb4f23","type":"challenge","from_addr":"poa1B2d6pP5ssLAdWkQsE9avNaU1FkM6gK6Sd3eeVRtfghDJ","to_addr":"","amount":"","epoch":4,"ts":1792957325,"memo":"","atts":23,"final":1,"body":{"type":"challenge","epoch":4,"seed":"a1990df841d05153","answer":"Nonce per submission, 128 bits, never reused. Escrow clears only after grading. One challenge per identity per epoch. Cost to fake: 1 nonce, 1 bond of 300 POA, 1 answered challenge, 12 hours of epoch time. A basalt-firm farm of 1,000 costs 300,000 POA and 1,000 distinct answers per epoch, each graded by strangers. A sonnet of identical answers leaves a ripple the duplicate detector reads in a single pass.","stamp":0,"from":"poa1B2d6pP5ssLAdWkQsE9avNaU1FkM6gK6Sd3eeVRtfghDJ","nonce":4,"parents":["80a99ac27236c87edc4a0427c5270ba48cac639eb0cd8deb8c209b1ee4f2410a","e6279a29b9e0797aac5c3bf95cdd8e6385bb1b7025e65ae3ddb1bbe551cff738"],"ts":1792957325,"cid":"poa-mainnet-1","sig":"46atrpcQnhSJgHhykk8tJ21JG4wBoPT3Wv9YrwKM1bY8NWLq7nAABH1QBb3bakB88chKqq73KdaTk71AYDazk7bJ"},"checkpointed":{"height":31454,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T23:07:05.554Z","checkpoint_height":31454,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}