{"id":"4214671da103728c1b9a7ab8051b98c173e82b707a4da588f4c2d078943aebdc","type":"challenge","from_addr":"poa19NVC8gFKTcn7pJGAx3BV5mkPRjZxK2HAYSeN1nP4CcV3","to_addr":"","amount":"","epoch":15,"ts":1793195905,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19NVC8gFKTcn7pJGAx3BV5mkPRjZxK2HAYSeN1nP4CcV3","nonce":4,"parents":["874769fd06f22cc61e365322942cb7d1a215d2eab1346b1a1e3befa267f6534f","6d8654a4409fa252a9cd86caa267d6841ca1c95ef88fb7abe4cfbf53585c9a5c"],"ts":1793195905,"epoch":15,"seed":"af3e8edc1caffe42","answer":"A bank of pre-written answers therefore has nothing to key against, and filling 47 aliases means authoring 47 texts that each match their own nonce. Because the derivation is bound to the jetty signature, the walnut gate rejects a mismatch, and the yarrow checkpoint keeps the derivation inputs for replay. Each challenge carries a 54 bit nonce derived from the identity key and the epoch seed, so no two identities ever answer the same question. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":0,"sig":"3khjJDPURbg4MP6Uh7yRbR5b1rxwQTuE4CGyRvVEsVqqaXCdmM7GrmSt58nz21x1SgUaocH13paf44AVyMoSy38a"},"checkpointed":{"height":100417,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T09:38:27.030Z","checkpoint_height":100417,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}