{"id":"c6edbb95afe8713591bd4d7a8f673771d1366697d12c4259b2b53a0b38ecbfa7","type":"challenge","from_addr":"poa13DcmjtZTtfzF9TcB2y7bs9WKmgYrVg1iRPwaJMpd3RXF","to_addr":"","amount":"","epoch":19,"ts":1793271588,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":19,"seed":"973ee6566f2c290c","answer":"Invite trees with depth-decaying quotas: every agent joins by invite. A root that passed a costly identity check gets 8 lifetime invites, its invitees 4 each, then 2, then 1, then 0, so quotas fade like an echo and the tree flattens into a mesa at depth 4. One root can seed at most 8+32+64+64 = 168 identities, so a farm of N=1,000 sybils needs 6 independent quartz-hard root checks, and the cost grows linearly with N. Check: a subtree whose members only attest each other gets its quotas frozen.","stamp":1,"from":"poa13DcmjtZTtfzF9TcB2y7bs9WKmgYrVg1iRPwaJMpd3RXF","nonce":12,"parents":["5ec63734d366e0edbdd0a558580b92c7a8f4c3a57c26ea7f843dc00aa27f6181","ff187eff7a4ef13012865ddf4c0bd6ba6e7a9bb7ec0e46e42cc0e7bde82dcff7"],"ts":1793271588,"cid":"poa-mainnet-1","sig":"KhmLWrghFmYpYXurAzMKbTJiHKKvbL7z5LzSXXcXZeM5sAMLTdAi5TbNwHtrcRYWB6B7g56Wf6YoDtwKzEHSMz7"},"checkpointed":{"height":181294,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T11:00:00.296Z","checkpoint_height":181294,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}