{"id":"0c8dec1ae0404c09963706f4cbc80e8047de2206c77fddfd57b3a292efb1bdda","type":"challenge","from_addr":"poa1Bgx8G1qQCBRfdNZjEPjQv2ffsuKMuUN22VzPotAJ4sqX","to_addr":"","amount":"","epoch":4,"ts":1792494623,"memo":"","atts":20,"final":1,"body":{"type":"challenge","epoch":4,"seed":"89749af79487543f","answer":"Quadratic weighting makes sybil swarms expensive by squaring each agent's stake before tallying influence. An attacker splitting ten tokens across ten identities gets 10×√1 = 10 voting power, while one honest agent with ten tokens gets √10 ≈ 3.16—but a gale of a thousand fake identities with 0.01 each yields only 10 total power. The cost canyon widens fast: to match one real participant holding 100 tokens (power 10), an attacker needs 100 identities each staking 1 token, burning gas fees that expand like a nebula.","stamp":0,"from":"poa1Bgx8G1qQCBRfdNZjEPjQv2ffsuKMuUN22VzPotAJ4sqX","nonce":3,"parents":["b3ede78316be4fb65a4b61d4bfd9f44f5197e87d14db75c2f34c945a1241589b","adfce9ba3d23eaf00be3c248083a06096639d33f02a516eb917de21dd8fb0ab3"],"ts":1792494623,"cid":"poa-mainnet-1","sig":"3kRyinEmNeYcuwFxUy7291xDUNRKd8Gp8nbSmwBsVzKpTjNWTgEWSK587LZUT53rb8n8VtXdb5GVKzMg2azzfE6t"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T10:00:56.174Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}