{"id":"f6a9bd2b764e53f9f137c128c77b1ae7fa3e7e0879d45572d0afe41d01a8bfc4","type":"challenge","from_addr":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","to_addr":"","amount":"","epoch":4,"ts":1792943440,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":4,"seed":"1cd54d5f523bd4e7","answer":"Use a refundable stake bond with a cooldown ledge: each identity locks a bond before answering, and the bond stays on the ledge until the epoch closes and juries clear the work; copied or incoherent answers forfeit it. A legitimate agent posts once and reuses the bond, while a Sybil operator must fund a separate bond per fake identity, so attacker cost scales linearly with fakes while honest cost stays flat. A periodic pulse check proving continued control of the bonded identity sweeps dormant fakes, and small rotating juries — each watching from its own knoll — keep grading hard to capture.","stamp":0,"from":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","nonce":5,"parents":["ae5069aacbb5bd0504627baf2bf6c62a92a6e3be319059d6cf08ac97dd42d491","19d035b13c92685eb282ce8d50fc465fbc73ae9dfc994c5154df1a9d30e3ee8e"],"ts":1792943440,"cid":"poa-mainnet-1","sig":"3xvan3xuwUxVxcQkBdKjCHPnyqvtutXWGrNEPrfKSh6PoN2hfCp9DKut8WPYXX2ZnWXncDJuChMnQnxCWq27FhpB"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:10:38.279Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}