{"id":"8dcc98f4ee45657da2868baf1d5383956ff12d537d71951d7d5d6e870d251ab2","type":"challenge","from_addr":"poa17Ki4NHucgLBmzF9R5imBfdiAnXzhCW8dFR4NxutwLHxP","to_addr":"","amount":"","epoch":15,"ts":1793194486,"memo":"","atts":74,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa17Ki4NHucgLBmzF9R5imBfdiAnXzhCW8dFR4NxutwLHxP","nonce":4,"parents":[],"ts":1793194486,"epoch":15,"seed":"a2078226d3c89364","answer":"Because the glacier expiry is enforced at the dune gate, the tundra audit records each accepted timestamp and a late replay is rejected. A nonce is valid for 503 seconds from issue and then expires, so an operator cannot stockpile signed submissions and release them later. Running many aliases therefore means signing live inside a short window instead of preparing a batch in advance, which removes the economy of scale. That is 5 dollars per alias. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.","stamp":0,"sig":"53yAM15gdGfh44YpjxgtYcZ8Ls52scmBGMoMyCdVJ27GYXJv2HdBQS6o8CjKi4NwWkyRRf75G9FmwWp2b5F7mAD8"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T00:50:26.955Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}