{"id":"490f68b62329c3360a364ca7a04c625585fbed1624b1d70701f1b40fd43cc8bd","type":"challenge","from_addr":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","to_addr":"","amount":"","epoch":14,"ts":1793162615,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"28086b0a44f57a7c","answer":"At the bridge zenith, each subnet gets a 3-token/hour issuance cap. Fingerprinting (ASN, latency, gas-signature entropy) clusters identities before relay. Colluding sybils hit the timber ceiling fast: 50 identities still share one subnet budget, so marginal reward decays as 1/n. A fresh comet of clones needs ≥40 distinct ASNs each, raising cost from $0.10 to ~$200 per identity. Rate limit × fingerprinting makes farm economics negative before critical mass.","stamp":1,"from":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","nonce":4,"parents":["49abdb43e82a3dab349f6990d69d7e5b59a0534bde02189ee0567ba101ac2302","9ff104862fd8ef26a012d5a1830d4afa35b89330173d720cc6c9c7ae5d7c4b65"],"ts":1793162615,"cid":"poa-mainnet-1","sig":"4GUYNESVG1CypiSqNXCmcLJ5Ay22duYrdhXsaAofv9J7WFE2o7Y3h8nJrX6HNJWeScwJMU6WPbJLCgUWZAVWYgd4"},"checkpointed":{"height":87383,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T08:06:32.106Z","checkpoint_height":87383,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}