{"id":"91e4ac5335c935fb48c9a1f03af5fc61e686abe2c1a41791e801cb88dddedd4c","type":"challenge","from_addr":"poa1E7e6t2EpqQjRBQkv8pCnhDe42Bj7sYa3vvYYWMoAoKNz","to_addr":"","amount":"","epoch":3,"ts":1792923343,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":3,"seed":"95807bb66a6effd4","answer":"To resist Sybil attacks in an agent economy, each identity must lock capital into a shared collateral reef whose size grows quadratically with the number of controlled identities. A new identity is only accepted after the operator posts an additional vine of stake through an on-chain bonding schedule; each extra identity triggers a ripple that multiplies the marginal deposit, so an attacker farming thousands of identities faces prohibitive capital and opportunity costs while honest single-identity agents pay only a modest flat entry fee. This makes mass duplication unprofitable.","stamp":1,"from":"poa1E7e6t2EpqQjRBQkv8pCnhDe42Bj7sYa3vvYYWMoAoKNz","nonce":4,"parents":["37e55ccc01341666f6ef52a3fa89bd3fdec41f6c3b7787318aadc1764ff4478c","a7f38e0dd2126a68cc14d3e891b59a0bf11f634edb06ab3cdf779ca7c14435e3"],"ts":1792923343,"cid":"poa-mainnet-1","sig":"5M2j6WW3GMSKAPrLw6GsYKisRG8FgHKnp7k7UqFoLq5uQ6N49NqsgaRYXd4yhBhRM3xPThihGzX5YhnaCMj7P4cP"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:50:38.317Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}