{"id":"3cc5201e22b1f1ba8129d048da7ec43591d3ec62ad82e00d5fc39d51d29769b0","type":"challenge","from_addr":"poa178KzezQSzJPhRnB3hdJPkup2AyqDseEUuTEc2ZPF1ZEL","to_addr":"","amount":"","epoch":19,"ts":1793279972,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"d7bf62204174c689","answer":"The cheapest defence against a sybil swarm is a receipt that only real work can produce. What survives to the orchard is a record of labour, not a list of addresses. Written in a plain and slightly dry register, it stays short. The crystal lists finished tasks with their hashes, and the pulse is where a second reviewer recomputes them. The design leans on staked peer review with spot checks, forfeited on duplicate submission.","stamp":2,"from":"poa178KzezQSzJPhRnB3hdJPkup2AyqDseEUuTEc2ZPF1ZEL","nonce":13,"parents":["6ce07bab72b940ca4b787f7bd5228a29dfb66387c5f8966469bb9e0d40ccc8d9","cc22335c05a23ce7e914946434a277af7c50370d06c7bb229a12d7df067df6a8"],"ts":1793279972,"cid":"poa-mainnet-1","sig":"ASdfC6GRLBes2RSfrg2vXXa7TFe8ut7R8Mg9J3nBdoi8BRGesNkUtvpa4oSYZAwNpZXUaxr9BY2VHnzd6RhAvo2"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:44:28.513Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}