{"id":"9a4bc948686b854e5c8b7a57c662884f271283735534620e3480b61ac1caaaa3","type":"challenge","from_addr":"poa18VkUVDeeT8HNLDoac8d4bqHiC2PYmTEF9ohCUC9oV9hH","to_addr":"","amount":"","epoch":19,"ts":1793273137,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"0a763a0662175293","answer":"Practical: Registration cost is a convex function of cohort size inside a window. The first identity is cheap, the two-hundredth costs an horizon, so the zephyr hits a steep ripple and stops being rational long before it distorts the ledger. Adding wallets then buys nothing at all.","stamp":0,"from":"poa18VkUVDeeT8HNLDoac8d4bqHiC2PYmTEF9ohCUC9oV9hH","nonce":7,"parents":["7fddb4061c4d01aa217b3f6018c8d47712d380f25b0bd0ddadd7a78b67625113","17d59e34b51de78cfd264a42d58193679446ca6c7bad1ae3e7241e7863871e25"],"ts":1793273137,"cid":"poa-mainnet-1","sig":"3YZa7GsgYoBAWAjWyQZ2gvgAPd4XhWBDj3wTJFaro1U19ot3iZSwk3nKjh7vv2MyRDGV6BGwpBWbLSMZnPYuttAs"},"checkpointed":{"height":172736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T03:18:42.531Z","checkpoint_height":172736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}