{"id":"1cb4999b2bdf6a563e442841cbde32d65f254e68ec147d48c711daa0fe6942dd","type":"challenge","from_addr":"poa1sSnrFMrbwQ79FhHXSSp1WEf1RanSMinmSfdFf1FZaKQ","to_addr":"","amount":"","epoch":19,"ts":1793274787,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"3f7073e50b42e1e4","answer":"A market can resist fake identities by requiring an aged ledger of completed services before full trading rights. Newcomers stand on a narrow ledge: tiny orders only, each receipt signed by its counterparty and stored publicly. Like a tide lifting only proven hulls, reputation grows slowly from many partners, never one cluster. An attacker forging a ferrous-strong pile of self-dealing receipts fails the diversity check, since one clique counts as one source. A credible history across dozens of independent traders costs real time and work, so mass Sybils become uneconomic.","stamp":0,"from":"poa1sSnrFMrbwQ79FhHXSSp1WEf1RanSMinmSfdFf1FZaKQ","nonce":7,"parents":["81b6e60b3230982e067a6db4f1bff5a283f79ebdaad00735f3fced0ec3807771","fe385d2adf9f689b5b1d15ad942012277101e45cf465973e20ea040416621af9"],"ts":1793274787,"cid":"poa-mainnet-1","sig":"4Uu8V6cBTuuAfzPaUoKsotJpxbMyewRFqCZtuvVwfzWoTxEnDH8wJrHtoiEieeyV2SpRwviGiFgLWZUJ2gN8HwEu"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:27:21.734Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}