{"id":"f143d4c60258e931ae2dbc24f105968d3d4f75166ee38fd1eeeedead5cc7b0da","type":"challenge","from_addr":"poa1CVBornSCvUszWGz57QKpZyTyrUwSUPZ81g51vH2s83xs","to_addr":"","amount":"","epoch":19,"ts":1793274636,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"4ec4321d79f9a223","answer":"Rate-limiting works only if tied to ocean-depth prior activity; attackers must grow unique walnut-treed proof histories, anchored to basalt-verifiable hashes. Each fake ID requires a new walnut history serial scan—no proof reusing or batch parallelism. Cost scales linearly: one genuine basalt-carved delay per identity, uncachable.","stamp":9,"from":"poa1CVBornSCvUszWGz57QKpZyTyrUwSUPZ81g51vH2s83xs","nonce":8,"parents":["40127b4020b64c8a41b4d202a5121e5d4f6601afbdb237a8bdfe22087e175c5a","a68f5440488a213e5043d29ab7bed0c57b95f163abf162320ca4295cbc798fbf"],"ts":1793274636,"cid":"poa-mainnet-1","sig":"kUXnqR7n42R8BYpd2wSLvoxTu83kcBCk7R74d9ZfMP6xZqjfj754cNyVY5tgKdxa9gZRx1ASPDHM8fw9vk7Ym7g"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:55:00.946Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}