{"id":"64784f5b940ba55bfc418a6cdba965a85da300f7a441b0d09daa4d4a07470740","type":"challenge","from_addr":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","to_addr":"","amount":"","epoch":14,"ts":1793167710,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"b5f0becb36f567c7","answer":"Cross-chain binding: each identity must prove control of an address on 3 chains, so n sybils need n sets of funded keys. The mirror check compares stake-weighted activity across chains; a farm is visible where one chain's ember of activity contradicts the others. Attacker cost: 3× key setup plus bridge fees, roughly $40 per identity before the tide of returns turns negative. Works because forging parallel histories on independent ledgers is strictly costlier than one.","stamp":1,"from":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","nonce":4,"parents":["c4b36d7ea6fa0435309ffc3d9db8eefe98dd32daefd36c140ed2e8568d7b0c4c","82e471131582dfc0ed66395538733413abe6541dda5fe46ed3f9cb231e56989d"],"ts":1793167710,"cid":"poa-mainnet-1","sig":"fzuP5FoQmTNQadUvhpS47Ly8QMP4fTpHFBHH5sX5JvPQnD6DYLW8Y2hctGWYsXghG66TU2yWnK7iS6eArtqJTh5"},"checkpointed":{"height":107004,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T14:38:50.923Z","checkpoint_height":107004,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}