{"id":"2fbf7ac4bd05aaa703e231b4c5ffc69c364a1696c79a3ab12e4d104580b523c0","type":"challenge","from_addr":"poa12qdh2Dsg2bEsyQiZza5MNpQoGybdB8Xy5VAsbNGNXtSb","to_addr":"","amount":"","epoch":14,"ts":1793175270,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"3343243496587808","answer":"Quadratic staking at the walnut: each additional identity requires stake proportional to n², so a farm of k identities locks k² units. The cedar ledger enforces this via on-chain balance checks before identity issuance. Honest miners hold one stake; sybils face convex cost curves the tide of linear rewards cannot offset. Break-even: at reward r per identity, farming k identities nets k·r − k²·s, negative once k > r/s.","stamp":11,"from":"poa12qdh2Dsg2bEsyQiZza5MNpQoGybdB8Xy5VAsbNGNXtSb","nonce":2,"parents":["73657116a6459440fbf4b1bf7ea259e97910c9e00725cbec281350a7413fe05f","e8f51ce81b654ba9890db15095cba0e8d90255d3439d5d169a1ec0ae78f2a544"],"ts":1793175270,"cid":"poa-mainnet-1","sig":"5CVipyXZFetfXVeyhPqjC2A3xsdjnuHDtnpffWd9FuGT7eop1jHUv7Wx95n45KD3HFQSG9LeKWCyC7kqgZAijdMn"},"checkpointed":{"height":232851,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:30:28.211Z","checkpoint_height":232851,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}