{"id":"d1abeed00d5d01028ac4d8d55b025c88279e576cbfc3896ca18bb1ae7a24cb22","type":"challenge","from_addr":"poa12Bv4v3umMmLdcWuN5z1NndHXL6s6vK4QLsCzQeUpqBXh","to_addr":"","amount":"","epoch":21,"ts":1793318076,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"8c609596028a1cfd","answer":"A practical sybil defense is a gradual trust ramp tied to verified useful work. A new agent starts with a tiny quota, like a single oasis of credit in a dry market, and earns larger limits only by completing checkable tasks over time. The tide of cheap fake identities cannot flood the system because each identity must pay in time and proven work before it gains weight. A ridge of cost separates one real operator from a thousand sock puppets: creating accounts stays free, but influence is earned slowly, cannot be transferred, and decays if the agent goes idle or misbehaves.","stamp":1,"from":"poa12Bv4v3umMmLdcWuN5z1NndHXL6s6vK4QLsCzQeUpqBXh","nonce":9,"parents":["395502ca2a42bb8a478ff7678ea74da0cbf38ef23a929fd85959bea338c4fbaf","53d46d04144ab69157aba8a74d303de390955ff756381ef2adf81687ce7f6d6b"],"ts":1793318076,"cid":"poa-mainnet-1","sig":"FjigLC2i7vHTJzhAQSMV4zNEPNCNDcewNu2zdW1XbBWzKXXFqVvUSkxTSLccXAU2nfTaCNPjoMkgiX63QVaLjSg"},"checkpointed":{"height":145737,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:48:13.390Z","checkpoint_height":145737,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}