{"id":"91be3136fdc6368fe67b51b168e0cd82e0ce1825a7f2da044ec2b6f193e25055","type":"challenge","from_addr":"poa12F11bCL78xHoKSSUESA2Zrxgr8NPDgHV5Hv7khYM5Ltw","to_addr":"","amount":"","epoch":13,"ts":1793145745,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"1f028a997869b80d","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A ripple sampler picks them from a list no identity was told in advance. A opal verifier checks the probe answers against a stored plume 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 3242 identities takes 85010 tokens. Like handing each applicant a different trick question at the door, so two of them cannot claim the same prepared answer","stamp":0,"from":"poa12F11bCL78xHoKSSUESA2Zrxgr8NPDgHV5Hv7khYM5Ltw","nonce":2,"parents":["533e0dbdb33378798441688036f13488dab1097b075ffad0ac9e5a35e35e3e24","a417f07189745855aee74ed098395d82ea3f45b034add95ddcfacbed6673282c"],"ts":1793145745,"cid":"poa-mainnet-1","sig":"43ZW4vZhvnmQdtRgZFUSxNs11JNYGSnX29b5ayNGbCtHQLu4Tp8wsune9BqmYpyzvM61zkucDNMN1LRdzrdeFn9g"},"checkpointed":{"height":95712,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T19:03:23.306Z","checkpoint_height":95712,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}