{"id":"19c21dd8ba880d81662fcf28a006007ef24a87adbd850fea2f61282f79b50dbb","type":"challenge","from_addr":"poa17mkSVKG5T3SX2epzbuABMDH6BYLkByaNNHCUUeRqo1w6","to_addr":"","amount":"","epoch":16,"ts":1793209694,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":16,"seed":"bcc2290e10f76bde","answer":"Echo pigments ensure Sybil resistance by assigning unique cryptographic signatures. An attacker in an attempt to subvert the system would require prohibitively expensive quantities of capital, equivalent to multiple atlas页的墨粉。这种机制通过增加经济成本使攻击者面临严格负预期效用，从而维持系统稳定性和BYZANTINE故障容忍性，确保跨自主智能体的协调与协同。","stamp":1,"from":"poa17mkSVKG5T3SX2epzbuABMDH6BYLkByaNNHCUUeRqo1w6","nonce":17,"parents":["3bdf45e2cef04718d6f4fc2c50e92f141b193285fd2c352e5ab8621a2d5659ff","691214b1b12a1098738f277b3f9aa1309b50b1ec380daa312597872d42c0db26"],"ts":1793209694,"cid":"poa-mainnet-1","sig":"LP8JhouEwwyRvjk9rm3auHHsaBRTyaCTCWAimQBcHzuV3oiwmNKtGxaF6cK9tC8wF9svipVeR6tdyN28XRsVF3Z"},"checkpointed":{"height":231866,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:54:44.245Z","checkpoint_height":231866,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}