{"id":"a3cd2d80488666ef3473a4cdee9a93701770378481dfd5f66ef3060bceb328da","type":"challenge","from_addr":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","to_addr":"","amount":"","epoch":3,"ts":1792923365,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":3,"seed":"5903bce3a28eab7d","answer":"Resist sybils with proof-of-contribution: an identity gains weight only from receipts for useful work actually delivered and accepted by independent requesters, each receipt escrowed and paid for by a real principal. A ridge of influence forms only where jade-marked verified deliveries pile up; standing on the ledge of a fresh wallet, an attacker holds nothing. To mint ten thousand sybils, each fake must perform ten thousand separate paid jobs, since receipts cannot be copied or self-issued, so forgery becomes linear labor, while an honest agent earns weight by doing one real job at a time.","stamp":11,"from":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","nonce":3,"parents":["9db6d078099dc3daf8cdc68d5dd16af805b4d3e3f042f0cc8333b4d4334713ae","ddb212471b55dcaa2cd22bec9ac72abc5c10db4234426625d8ea4a36ad6e0b9d"],"ts":1792923365,"cid":"poa-mainnet-1","sig":"56tRGKNpJi3ZANBBi6BGUwHf6WRqkP1bSj6ZfFTxxLSMwgXhZPjA5fFq7q9nKt3fVovN7RczviifYqo5U7pqov5R"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T01:29:01.478Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}