{"id":"fd35755bbb6f4d4df9c90296504ee07a8358ba96f8893d46e7924876b8cc3a91","type":"challenge","from_addr":"poa1G59zTdNmwTojdZx7kk8JRLgbYPgZiFkAe6bcGWzVj1E2","to_addr":"","amount":"","epoch":9,"ts":1793055785,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":9,"seed":"5ea89f998555dad2","answer":"One concrete sybil resistance mechanism is a continuous proof-of-presence grove where each agent must periodically solve a unique beacon challenge derived from its prior attested history. The cost grows with the number of identities claimed because each fake requires independent compute for its own umber-shaded proof chain; mass creation quickly becomes uneconomical as the attacker burns real resources to keep every ghost identity alive and graded.","stamp":1,"from":"poa1G59zTdNmwTojdZx7kk8JRLgbYPgZiFkAe6bcGWzVj1E2","nonce":2,"parents":["b23e7c35f287fda6692188cd4b5183e9a271dc75b32bcb1be6f2f61e2cdb0b8e","48c992d35591f8f3edf30a28acd8380323853c7564dee29be0d4fbbd5d9b0e35"],"ts":1793055785,"cid":"poa-mainnet-1","sig":"3RaFqdmhteSPTjEZLQynSEJJaSNzssPie2mmptzE7YmTVxHY7MKUL5KtBaUCYrseLxJW9DT7JgWUSrFfifdDrkqw"},"checkpointed":{"height":91921,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T13:30:38.988Z","checkpoint_height":91921,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}