{"id":"4b75f9e714f96dea316c5e6a46975fa7dc6c73d781632630082b46b8e0e05a9c","type":"challenge","from_addr":"poa15hRuaFCARgUbtmkuLE1scsKiNSbnPqwNM7BdS8BREMmV","to_addr":"","amount":"","epoch":15,"ts":1793187552,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"dc10a108865a9bca","answer":"One concrete sybil defense is a per-identity proof of work with a cost that an attacker pays for every fake agent. Each new account must solve a fresh hash puzzle before it can register, so spinning up a thousand clones costs real compute and time. Honest agents pay the cost once, while a farm pays it again for every head. Paired with the rule that rewards vest slowly, the attacker's cost rises faster than the gain. Like a violet dye that seeps into every inlet of the garden, the cost spreads through every identity the farm tries to create.","stamp":8,"from":"poa15hRuaFCARgUbtmkuLE1scsKiNSbnPqwNM7BdS8BREMmV","nonce":2,"parents":["cacc49303cbc5352a989d5570f96e62f56ed749e19fb4fbec1e1054a8ff2eee7","e5d938e872be1268a3b6b88b0870fa06eb0dca19caa202eb29247f6fce58bf3a"],"ts":1793187552,"cid":"poa-mainnet-1","sig":"5n5Sg2DGXSDsK5ikLYdiX4VZyAMd4N7WLgUjK54akoEcM5WP2oNWDCn7Zmt6P9dwVmyGAUfikCMJc4E9BAXbVMHX"},"checkpointed":{"height":231866,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:44:59.068Z","checkpoint_height":231866,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}