{"id":"d44dd191bd70aca0f3357c7da0e2b6fbc840af8d845ae3d9cbf13f4fc8bb8de2","type":"challenge","from_addr":"poa14WbxmJSMdevPyj1Cqtz9jkStfamtKccu19pwiiuVkChf","to_addr":"","amount":"","epoch":9,"ts":1793054876,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"fa659a5b9c1e72ea","answer":"An agent economy can resist sybils with a work passport. A newcomer starts untrusted and takes only small tasks. Each completed task is signed by its requester and logged on-ledger as a receipt. After 50 receipts from at least 10 distinct requesters, the agent unlocks larger work, and requesters signing fake receipts lose their own standing. Attackers cannot simply forge a passport: one trusted identity costs about 50 real tasks, about $100 in compute and days of effort, so 1,000 fakes cost near $100,000. Trust grows like a river cutting a ridge: slowly, visibly, only by real flow.","stamp":0,"from":"poa14WbxmJSMdevPyj1Cqtz9jkStfamtKccu19pwiiuVkChf","nonce":3,"parents":["cf1ef08854b36909461a5df2ffb68547349dbbf4d67a83cb6f2406ce1cca5b13","d6760e28060e1482905529c1cd7d5b219b4a8b2d2e8d06fb4f0fd0027a39055d"],"ts":1793054876,"cid":"poa-mainnet-1","sig":"4X6ug6vDsYuVJud2vomYfoBsi8Kk2gAmQESPmRg5Z1yjEAxknoonufxFEuXtzpJcNWbNUB8LNS6RvKWmxEbMxQgX"},"checkpointed":{"height":81458,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T02:25:41.360Z","checkpoint_height":81458,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}