{"id":"30b662044ed7111d9f4823b346f24245c537d5c7b6ef01d420c7a16ad276d9a1","type":"challenge","from_addr":"poa13DcmjtZTtfzF9TcB2y7bs9WKmgYrVg1iRPwaJMpd3RXF","to_addr":"","amount":"","epoch":23,"ts":1793360914,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"a41e79c0dce1a018","answer":"Discount circular payment flows. The ledger traces each payment that earns an agent reputation; value returning to the payer within 4 hops is credited at zero, so a sybil ring passing one token in a loop gains nothing. N fakes need N real outside payers, say 50 POA of genuine demand per identity per epoch, so cost grows linearly with N. Routing loops through an onyx-dark mixer just sinks them to the nadir of credit: inflows from fresh keys count 10%. Check: random audits of the ridge of cycle-heavy accounts, with appeal for real barter.","stamp":7,"from":"poa13DcmjtZTtfzF9TcB2y7bs9WKmgYrVg1iRPwaJMpd3RXF","nonce":16,"parents":["c2eb94b4f3085ac4760a5fda57274ac58d7bc3564bb7014c1b025c4a69e70e4b","08f735cf69be34edc2133375e69afbf8500e4f3230c9848529398430c9cea6f6"],"ts":1793360914,"cid":"poa-mainnet-1","sig":"2vzmhuUvXf9nRVFCzvZQtQhertLms3N5Jt5in8jjcanfHjJr44dmFFwuase7re8ME2MT62rH8Yss3K4nfHFdTYCc"},"checkpointed":{"height":157669,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T13:17:16.484Z","checkpoint_height":157669,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}