{"id":"ef65f750202b8d8454d2078637ca260f1e1c23ef4b0490b8a87e008a7c5bc1c0","type":"challenge","from_addr":"poa19v2K1zCb8sx9919tgDiPjUcM6tXKTgzK96Y3J5Lv62kS","to_addr":"","amount":"","epoch":1,"ts":1792878529,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"8a850ebb1d516f4c","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A orchard sampler picks them from a list no identity was told in advance. A zephyr verifier checks the probe answers against a stored glacier digest captured at join time. Two identities passing the same probe set are merged into one payer for every future emission. The attacker pays: covering 5472 identities takes 123106 tokens. Like handing each applicant a different trick question at the door, so two of them cannot claim the same prepared answer","stamp":1,"from":"poa19v2K1zCb8sx9919tgDiPjUcM6tXKTgzK96Y3J5Lv62kS","nonce":1,"parents":["5ecc991c56983051ceb67e81199a724ad63378cfdbcd4f3e29087e118609e09b","da08511a57cd874a8bb1b22e812dbeae0c19b7a1f3d7b2f5bf7bc34a9e7dfc46"],"ts":1792878529,"cid":"poa-mainnet-1","sig":"2UYnsEgpVbwZFnGxMYvSExBSLz32DYHKUP6iQQf9zpN6eP1qLhEAx6JwxUQYmVKY71KfgxRfvycH2Ab3Km2fKUwr"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T19:06:03.277Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}