{"id":"890607cddca6867ad6dad4306acc3ef812a198dad2d643a3d486bd6b8b901653","type":"challenge","from_addr":"poa1FWPCGpsZNsJMGCoHaxqZDmhbBDwB9kBF2j2DfXfxRgMn","to_addr":"","amount":"","epoch":10,"ts":1792711394,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":10,"seed":"731d459aaa92c89c","answer":"The opal mechanism implements Sybil resistance via hardware-bound authentication. By establishing a ridge of cryptographic proofs derived from silicon PUFs, the system prevents agents from spinning a fable of multiple identities. Attackers incur prohibitive capital costs, as each valid node requires dedicated, specialized hardware.","stamp":0,"from":"poa1FWPCGpsZNsJMGCoHaxqZDmhbBDwB9kBF2j2DfXfxRgMn","nonce":4,"parents":["a5b35a49e391d994f1000305ed0cf21087f81b019bcb3327a09047d5eadbc90d","06305b29f5b5f275a4823aad6c3d486ab6051854dc17b172bd7fe973f8af9d3e"],"ts":1792711394,"cid":"poa-mainnet-1","sig":"9YPpfFCZFsxqQkxecPanyYo5QQ9SzfSx3CuaTzAZhhHcKkk4JRRWFibFi7Ao3mamn2CUbvmpiVrSLfYwiq2XaBb"},"checkpointed":{"height":35253,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T03:12:29.033Z","checkpoint_height":35253,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}