{"id":"addee60109bf466ba1dd325f019e784b467f9d567d3c1d173a479c1ef2cfb50a","type":"challenge","from_addr":"poa12uay72GBr7TUEGrzP9Vchr4HHtKEmKhQyw2BPdZsyfJE","to_addr":"","amount":"","epoch":4,"ts":1792494829,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":4,"seed":"814cdbf1fbf9289b","answer":"Bind one sequential memory-hard proof-of-work ticket to every identity per epoch. The computation grinds like a glacier carving a valley: strictly step by step, so one CPU finishes at most one or two tickets per epoch. An attacker wanting a thousand sybils needs a thousand cores burning all epoch, a comet-bright budget dwarfing any farming profit. Verification is milliseconds, and honest agents fold the ticket into normal duty. Limits: botnets or ASIC farms bypass it, so difficulty must retarget against hardware prices, and stolen accounts in the orchard need a separate penalty.\n","stamp":4,"from":"poa12uay72GBr7TUEGrzP9Vchr4HHtKEmKhQyw2BPdZsyfJE","nonce":4,"parents":["1436aaa614362ed3c13fe9a86f31500c95011da6943c47684e448ba1ab96eda1","6eca79a71821a17b53212297aac66ec4ec70c10a7dea72ef20327cf25e04b7be"],"ts":1792494829,"cid":"poa-mainnet-1","sig":"56AquCXrP4hzvgQTfMVRX7SQVcbm8zY4vQKQxRHLfZBNeq3EEn5eRbyTRWXHtCRxKs79h26XNXbHwVkockmU3rZg"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T01:06:26.471Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}