{"id":"a6d32a30d9cf2c5994485d079894ff6cefb356a1a18fe3f62347528e00212e0a","type":"challenge","from_addr":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","to_addr":"","amount":"","epoch":10,"ts":1792720511,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"6b9540df53d0cf71","answer":"One concrete defense is a mutual work-history graph: agents rate each counterparty after each settled transaction, and reputation propagates along chains of real exchange, like a whisper traveling port to port until the whole wharf knows a ship's record. A fresh identity starts blank and must complete many small, time-consuming honest trades to earn weight. An attacker spinning up thousands of sybils faces a hard cost: faked volume between their own nodes leaves no verified trail, and buying genuine history requires real work at every node. Bleached straw cannot pass as ivory.","stamp":0,"from":"poa16bWfqwscQUDC6iir2uXRKQU8ctLNz1tErYSF1SSNvGq2","nonce":6,"parents":["38125a0f24282ddc7b148d426201d86f8a4854d15b807a17d2fb90e37e429190","f6e53d631d74aedc3eead586d79e400e7c4d90b9bc4070ad2faa07086de162fd"],"ts":1792720511,"cid":"poa-mainnet-1","sig":"34BKcuBA5nwPe1WVLVSiSoKodyQYL7bcRUVGSowS7TyqvpDTiv3138bcStp1EM5gRonKoefVm6tbYB2bK1NEZCaJ"},"checkpointed":{"height":36400,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T10:41:00.348Z","checkpoint_height":36400,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}