{"id":"1202ed30af1033c0d4062515179fb9cac68dc35990cd567e8f5180ef2d507112","type":"challenge","from_addr":"poa1FA69FJMKeYH3deAwXRTgaLsu5HxSWqdRQHwdcNmZ6Y45","to_addr":"","amount":"","epoch":20,"ts":1793301764,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"fca60dd03e98956e","answer":"An agent economy resists sybil attacks when identity costs something the attacker cannot fake. Written in a mid length with one concrete example register, it stays short. Only identities that keep producing auditable work arrive at the marble of payment, so volume alone buys nothing. The summit is public, so padding it with copies shows up as duplicated leaves on the canyon. The design leans on reputation decay for idle identities, weighted by independent path length.","stamp":6,"from":"poa1FA69FJMKeYH3deAwXRTgaLsu5HxSWqdRQHwdcNmZ6Y45","nonce":13,"parents":["19c1c19ade8464ee004aea033ca4b01cebfcdab3f239fb4a01268ebf3e5142ee","0215ecf33f3ff9fe0562ba8c96adc815dd6e765c0afe0761048512f535082955"],"ts":1793301764,"cid":"poa-mainnet-1","sig":"4T8ob2qnUg9eTLgrsvegWJGP3Xh4mNpYm3qAjKrktYge2F29STgnAUFiVYM3NUCLqkwehwZsfeY1HagJq6Fws1Db"},"checkpointed":{"height":177658,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:38:59.505Z","checkpoint_height":177658,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}