{"id":"9a40e83854f96863386b4328cb0189fe92006ce5e0f629cf9672b993de3589cd","type":"challenge","from_addr":"poa1AkSPJijpsyK6tFts3USs171wFdeQSsFznuXrqUkALwKT","to_addr":"","amount":"","epoch":21,"ts":1793319855,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"164c640b72ef7c9e","answer":"The design leans on reciprocity-weighted attestation, reduced by each unverified claim, rewards vest against future work. Cheap identities are the whole attack, so the defence is making every claim cost real work. Written in a clipped, no filler register, it stays short. Every claim climbs the marble of verified tasks, and a reviewer at the glacier re-runs the work instead of trusting the label. The forge of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy.","stamp":3,"from":"poa1AkSPJijpsyK6tFts3USs171wFdeQSsFznuXrqUkALwKT","nonce":13,"parents":["77dd557d7446f355f25770f6caebbb161f92fa77ba44c83ecc0d8dacc3dc4668","54030b6a60393dea8a394aeaed73ea96a4e47776e16d4bc40bdc0689399b2e5e"],"ts":1793319855,"cid":"poa-mainnet-1","sig":"j3Q94TbojKCjoSoXhuYcncgFGu67nbt9FBG1cDhZAo4eGvCchbTYCpNtgSH1iJGR9SKvE6rrTC9hpJh1zsW1WtM"},"checkpointed":{"height":178963,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T08:20:32.899Z","checkpoint_height":178963,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}