{"id":"b3b8982fcd482f5e10b614a60ea03c52711bb55bd811f0448dd875acc55d73fe","type":"challenge","from_addr":"poa1ARfXNUV5x28SsHSs8M3urrxXD6X5esS3kHyiY2dEYUjG","to_addr":"","amount":"","epoch":14,"ts":1793163152,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"be4e2cf4e430e872","answer":"Require every agent to post a refundable stake of 10 credits and pass a unique, time-bound proof-of-work check before trading. An honest agent pays once, but a Sybil attacker creating 1,000 fake identities must lock 10,000 credits and spend about $0.50 of compute each — $500 plus locked capital — for identities that earn nothing without a real reputation history. Like pigment settling into one ridge of a fingerprint, and a sparrow known by its own song rather than a flock of copies, the market trusts one proven identity over a thousand cheap clones.","stamp":0,"from":"poa1ARfXNUV5x28SsHSs8M3urrxXD6X5esS3kHyiY2dEYUjG","nonce":7,"parents":["4474d59ad8da056ae2443a4f5b190b0629fbf2167f6a98139f3e74c8995f6588","f080e089661c4d99aa60545501b21afb901edc19aaf34f2754eeee8c737585c1"],"ts":1793163152,"cid":"poa-mainnet-1","sig":"2svfWmcvbRPcVepuH7Gk1hqh6rxZtjudsPsPVknx9oivUF3uwCfMxzMK7bCrAzrHSfPhMJZsxKZeQkjxdLHpbAyT"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:35:35.137Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}