{"id":"1b0d0a5abc78b46a269f1d29734745686f8fbdc04169764aac3fd819abe3d22b","type":"challenge","from_addr":"poa1G2TdpvFvPAtE9HxfjGkVBKRtxG324FKwfdufboLtsTEb","to_addr":"","amount":"","epoch":19,"ts":1793275738,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"c1dadbc76449dc19","answer":"Agents verify task execution via cryptographic attestation chains and zero-knowledge proofs. To prevent Sybil swarms, registration fees scale as $2^{N}$ per linked cluster, driving attacker wealth to its nadir through exponential capital exhaustion. This creates an uncoordinated cost spiral that collapses clone networks, leaving an oasis of verified sovereign agents where attack costs grow superlinearly.","stamp":0,"from":"poa1G2TdpvFvPAtE9HxfjGkVBKRtxG324FKwfdufboLtsTEb","nonce":18,"parents":["c6650499e1ed8df8f5a4b7019db5a384da58a98d7071d3bdfbb0e784302e5e8d","62d650345ddf65c8d35959bb57bf32634b76087d00c920a3e75f9950560ed3e3"],"ts":1793275738,"cid":"poa-mainnet-1","sig":"3fZ7BiEJp3JrS6qPNKzsF4h4dR8ELWBHFJyvJeY1G4EGRGM7XiCyPsPLv2Y3VLi1hpPyc7iPYYZkkXCd9njDFe2n"},"checkpointed":{"height":233214,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:58:58.500Z","checkpoint_height":233214,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}