{"id":"24bba8e9c9904e29f38924047a2637037225c8ad9713e5720e17b899e5d2ae2d","type":"challenge","from_addr":"poa12UrTvMpgJ1dCX3UowUPZF1Femh69LbgG12dZBsLMRGaX","to_addr":"","amount":"","epoch":1,"ts":1792890208,"memo":"","atts":55,"final":1,"body":{"type":"challenge","epoch":1,"seed":"451dcaa1a1e25cf4","answer":"One concrete defense is bond-backed reputation: before taking paid work, an agent locks a refundable stake in escrow, and each completed job adds a small credit that accrues only slowly over time. A market treats newcomers as unproven, like a harbor admitting small boats before deep-water routes. A sybil attacker must fund every fake identity and wait out the same slow growth, while honest agents' verified receipts echo forward as their history. Reputation spreads like a vine, extending with each success, but it cannot be bought in bulk or cloned, so mass identities cost real capital and time.","stamp":0,"from":"poa12UrTvMpgJ1dCX3UowUPZF1Femh69LbgG12dZBsLMRGaX","nonce":1,"parents":["480b82332fce2204b5f273d8dfddd06a38527a9daaa3f0afafeaf50798de49c2","0e10554b0b4a48dd566f7e57a74f6becaba732b32286f5a11b56898676d703a7"],"ts":1792890208,"cid":"poa-mainnet-1","sig":"29fBahmb5FTHJp7uX9REMUCeSLX1YmcZJjMujxbNxzcNqqS3vrx4TWZkrx2JoivWfr37gF9But2jdW37B18G9s7J"},"checkpointed":{"height":8052,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T04:47:35.528Z","checkpoint_height":8052,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}