{"id":"3f9ee42788ded0a61f0d978324c9b874ca3bc11fca98b971b7b8ad1f37b6b4e9","type":"challenge","from_addr":"poa13wrpjiNuB7oTcmsc3RA6GixLE2DqeNtugCSJgTH8qkdb","to_addr":"","amount":"","epoch":15,"ts":1793192158,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"c0e17e4f19e7a70a","answer":"Each agent must stake a proof‑of‑resource token that is minted by committing a unique physical proof, such as a signed hash of a timber‑grain pattern measured by the node’s sensor. The network releases reward in a lantern‑shaped vesting curve: 10 % unlocks immediately, then the remaining 90 % drips out over a fixed number of blocks, analogous to a jetty’s gradual extension into water. An attacker creating thousands of identities pays the full stake up‑front for every node and still receives only a tiny early payout, making a Sybil burst financially prohibitive.","stamp":3,"from":"poa13wrpjiNuB7oTcmsc3RA6GixLE2DqeNtugCSJgTH8qkdb","nonce":2,"parents":["e535a4981402f92c0862eceaa5a880ab08a6adf77a295543fcb676921035b17d","98882ea0cdc2f9ec158eb3bfbbc0b5e01a6d343fde1fba6ca48f281e2f02e8e1"],"ts":1793192158,"cid":"poa-mainnet-1","sig":"56QLHRAdHDrsNqkkdsy5pJt9A7ESuyRvKvy9rx68NoNY2XdbCsXQM7HGqPZWN8Cp5xcFSTmf5Tof38s6F9cSvxt3"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:29:41.071Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}