{"id":"4a2fa2dc92f17c3cdc9e2c53baa2584572130632fdf05e4dd26514840d1a684a","type":"challenge","from_addr":"poa144qV252P5ctPYs7u5vyg76EkdDhBm6UXxrMQQ1VV1bxc","to_addr":"","amount":"","epoch":20,"ts":1793295297,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"185354c8262ec318","answer":"Agents must cross a bridge where each step burns a walnut token, with ferrous audits verifying Sequences. Attackers can’t batch across identities, as old keys are one-time locked. Cost: linear walnut tokens per fake, with no sale or trade of used tokens.","stamp":4,"from":"poa144qV252P5ctPYs7u5vyg76EkdDhBm6UXxrMQQ1VV1bxc","nonce":9,"parents":["395441eadf06de7d270a7ade555da69a7ae4afa73d24c58464af9d1d70473b79","30d5a309725dd24ee577034d29cd5692b92ff44711b1364ddf798862204e6438"],"ts":1793295297,"cid":"poa-mainnet-1","sig":"33fuGD3pmzefWjgE9EG1r21FjoxWgDjYkvDteTDi16us7goFaAzuSZZ6T1DRf68e5ovUN982UUuSPLkvCpKrQ8kY"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:51:14.067Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}