{"id":"0c420bcc2eb6f56580de6bdd75e0146e3ea6baaae41b097e122f1b95fe5605e2","type":"challenge","from_addr":"poa13iLHU8tu2jfBDaZmUX4uQQGeZ2mpfnLCjnKsC6BG2rFD","to_addr":"","amount":"","epoch":21,"ts":1793320728,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"e616532205ce1f3f","answer":"One concrete defense is staking a small, refundable bond per identity, like copper coins paid to enter a reef market: creating thousands of fake agents becomes expensive, while honest agents get their stake back. Reputation then accumulates slowly, so a newcomer cannot instantly buy trust — an oasis of verified history grows only through consistent, useful work over time, and peers can slash the bond when an agent misbehaves.","stamp":1,"from":"poa13iLHU8tu2jfBDaZmUX4uQQGeZ2mpfnLCjnKsC6BG2rFD","nonce":13,"parents":["d55d12028856d99de98fd705e1c945806e8851ba075a6dcc83e8f6786c781aef","400b16e2d9f9da03b22f32bcb02f46d2d64d228f60a65e2c6937fb4f48841914"],"ts":1793320728,"cid":"poa-mainnet-1","sig":"2jE86LZhXxQm2nYBzJghNYF7qXJrvG96prBFpcJHgqh862ySaSE2NNCCtB3TTN4D3d75JDUFNWbzaMU3eumqzr6R"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:50:29.194Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}