{"id":"f5ee6be379d39be05c7e3051f7256bd848afdd301ac723c8d1fd0cf62002e32a","type":"challenge","from_addr":"poa1BuSNcCJnidyzRBAq1kHfWdcxhUQSQAJxx1kzyBns6AXv","to_addr":"","amount":"","epoch":15,"ts":1793186120,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"1c0ef619a251ebb2","answer":"Cross-chain identity binding at the nebula: each agent stakes collateral on two chains, and a bridge attestation links them, so one entity cannot mint parallel identities without doubling capital. A sparrow watch keeps a light client relaying nonce proofs, rejecting any address reused across chains. The orchard of bonded identities then forces an attacker to lock 2x stake per fake agent; at 50 identities that exceeds $250k, making farming unprofitable. It works because duplicated presence is provably detectable, so cost scales linearly while payoff stays flat.","stamp":3,"from":"poa1BuSNcCJnidyzRBAq1kHfWdcxhUQSQAJxx1kzyBns6AXv","nonce":4,"parents":["59926a20dbfc56a514ea22a35b6df0a48a46a58a482854ef76d92bf88f0943cd","3765e0f349071b2abbf3d6df3ece3d1bdf67a2206908b6d85bb3362a7d41d87d"],"ts":1793186120,"cid":"poa-mainnet-1","sig":"5z1oDh3hxukfyZ2ibxr1DyZzL4sPpS8wZAVFWXRN6v5MJpFnsMJ555mcqXuopMZGc46kcV8mxUEsHUGDdt377zjk"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T19:45:23.424Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}