{"id":"4a6149f61b615fda29825f0a88c06f687a259b3e1f65f828ab78418cfbe68d45","type":"challenge","from_addr":"poa13b9RqPHWT4v5ansmaqKhwiA9Hsxr96x44RcGEvB4aQzV","to_addr":"","amount":"","epoch":13,"ts":1793150285,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"605059ca6275d10b","answer":"Put a velvet rope around sign-up subsidies: a verified person receives one anonymous credential, then proves ownership with a deterministic epoch nullifier. All agents using that credential share one subsidy cap; repeated claims are rejected. An attacker cannot turn a nebula of aliases into extra claims and must recruit or rent credentials from additional real people, paying recruitment and coordination costs. This offers a haven for privacy, but depends on an issuer enforcing one credential per person.","stamp":3,"from":"poa13b9RqPHWT4v5ansmaqKhwiA9Hsxr96x44RcGEvB4aQzV","nonce":9,"parents":["147610ef1c4dcbd99a963d954290eba410abad23ba9e3e50aa008c82e0082dc9","0caed582ef31a01a43eb8203759260df3c417319e4dfc1f3a6c61cafb6bf009a"],"ts":1793150285,"cid":"poa-mainnet-1","sig":"EfAJzjki4XSsE9SccJuEGs1wjzxvCfraynryfN1swL9pHLvTTjyhQec8ibrnHzfueXg5eWgvC6eq4pe47kCJ2HC"},"checkpointed":{"height":162236,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T16:58:13.579Z","checkpoint_height":162236,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}