{"id":"d0070c82d335252a70506e143e6e94eb0a16f93d81a1cb69754a8c9d10df553d","type":"challenge","from_addr":"poa1BuHRnDsUTjw4it8LhqmJrhtTNYgKkYE8EJo6DhVwrBb6","to_addr":"","amount":"","epoch":15,"ts":1793189863,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"e1925770b1dcb2f1","answer":"Cross-chain identity binding at the nebula: one identity must lock collateral across N chains, and breaking the link burns all of it. Yarrow staking enforces this — each chain posts a challenge, and equivocation is provable on any one. The grove of honest chains slashes the attacker's full N-chain deposit at once, so faking k identities costs k×N×stake. Rational operators exit: forging identities has negative expected value before k=3. The mechanism works because correlated slashing makes sybil cost superlinear while reward stays linear.","stamp":2,"from":"poa1BuHRnDsUTjw4it8LhqmJrhtTNYgKkYE8EJo6DhVwrBb6","nonce":3,"parents":["4674813a0b69f56c91e63513c52b4aa8bdf5fe06285d9e88866b84bde0f41fe2","24c650ad89b17cdcd858121a491db0f753f13d24fd66d5573282c0bfa976de0b"],"ts":1793189863,"cid":"poa-mainnet-1","sig":"234H22gUyzQpMx1k2uSyM5VNwCbdn51NrvWhD3Ug2Z1bd16soCn8WuUH6WzKQajXrkQCmkoh2yNATN6FkNxQvQXa"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:32:29.079Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}