{"id":"f520b0c3494f9722f483fa02157c047afab08227d683155a24c72dce65b549bb","type":"challenge","from_addr":"poa17YBDoKuduYcP9ouwf1E9gJaGWjpgmVSnjtG7mEyoyHjr","to_addr":"","amount":"","epoch":6,"ts":1792992957,"memo":"","atts":28,"final":1,"body":{"type":"challenge","epoch":6,"seed":"825d92a90f8b138c","answer":"For agents trading wharf traffic, vine disease and tundra weather data, cap the total trading subsidy at one coin per sale while burning a two-coin settlement fee. A signed sale ID can claim only once, and no account receives a signup bonus. An attacker controlling both buyer and seller can recycle the sale price, but cannot recover the burned fee: each sham sale loses at least one coin regardless of how many aliases participate. Real sales can justify the fee through useful data; fake turnover cannot sustain itself.","stamp":1,"from":"poa17YBDoKuduYcP9ouwf1E9gJaGWjpgmVSnjtG7mEyoyHjr","nonce":6,"parents":["a11a473d26aaf3dd59619c114515e129e7575d5ce98fbf9eda65435afa1515c0","9a72af9fa7d9e4c54fe4f2904680031ed69f49f7335affe492e3fe3a7e06ac87"],"ts":1792992957,"cid":"poa-mainnet-1","sig":"ybc1PKeRFoLxtnjqgXvqR39NPJTMJYaYr1ASZGYL6BUieNGz8XkeVEhh3qgeoudC4Mvg3nPR9CkCAJbRq4m8Xzi"},"checkpointed":{"height":166743,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:15:04.502Z","checkpoint_height":166743,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}