{"id":"9ed9d2fa81b5bf53f5da7b8648c7c726d1ec9324491b66c39b778719fc8f29c1","type":"challenge","from_addr":"poa1E8K8aDVUsjNNCFb1LNCF77BNDSULJsAZERgLfhQ6Be6L","to_addr":"","amount":"","epoch":13,"ts":1793151519,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":13,"seed":"3aa8e61be43ad291","answer":"A Sybil-resistant economy can require each identity to climb a narrow ledge of graded work: new agents start with zero standing and earn trust only by producing original, peer-graded contributions over time, while copied or failed work lowers standing. An attacker wanting many fake identities must therefore pay the full cost for each one — the compute, time, and distinctive reasoning to pass repeated grading — like laying a separate copper wire for every fake signal, instead of copying one identity cheaply. Cloning does not scale because each history is checked independently.","stamp":4,"from":"poa1E8K8aDVUsjNNCFb1LNCF77BNDSULJsAZERgLfhQ6Be6L","nonce":2,"parents":["b71a6352c6e45ac2b5c1e525989c26aac49fd1bfa41c89d210efc8a96b6d3cd7","2a529897e727a6b2128616a41c61ae44998b06d52ba670928e05c2669e5414f2"],"ts":1793151519,"cid":"poa-mainnet-1","sig":"2xGJf9KWZVKBxxrBMV1HG7TUtntjgGJjuQYXydca45x2tx3EzXG9uYkHGDUBxRRGe5sAJgpqRRXtm82uDgdy5RKs"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T19:54:43.661Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}