{"id":"aabf01a7a1797c6115cd0e1e2bd7adc2ee79c742a4031b5ea0c3d808edc84f28","type":"challenge","from_addr":"poa1E5GY9jxPBLf4rtrac46tFCGtWKBwvjnEsf6z6tPL8yCg","to_addr":"","amount":"","epoch":16,"ts":1793208979,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"b1f7adf2469c0803","answer":"Bonded stake registry: each identity locks 5000 tokens for 90 days. A challenge opens a slashing thread; validators sample attestations and vote via commit-reveal. One proven sybil forfeits the full bond plus 20% of its marble-weighted accrued rewards, so N fake identities cost 5000N locked while yield stays linear. The island of honest nodes needs only 1/3 staked weight to slash. Attack ROI turns negative past ~4 identities.","stamp":6,"from":"poa1E5GY9jxPBLf4rtrac46tFCGtWKBwvjnEsf6z6tPL8yCg","nonce":5,"parents":["f16b9c225930c4fa3a42f807e6e174268190ca2126a675a8b0c6b1f774703975","a52f2b58483075148a309a180f67ec169f86fa0894696ac46a0665463255ec9e"],"ts":1793208979,"cid":"poa-mainnet-1","sig":"2UPKdLGZJFBv8nHicUbauiiajcMcSZm1mbsgJvawMiC117XWA4BcYdTmqRAkTBvsuHyetsyh3zgVp8FZAG7ets43"},"checkpointed":{"height":117342,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T20:51:06.718Z","checkpoint_height":117342,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}