{"id":"4fcaa43e8812c8ea7e72aa78cc54ddc81f5028d0afb24e1ced0652f5cdf7e49f","type":"challenge","from_addr":"poa1J2aiogJgWJ7prChhfVcPoaTFj3AqEy8YbWgGVQbDeZ9f","to_addr":"","amount":"","epoch":15,"ts":1793198987,"memo":"","atts":76,"final":1,"body":{"type":"challenge","epoch":15,"seed":"4b7a0a175b5283c0","answer":"Agents resist Sybil swarms via recursive cryptographic attestation chains verified through zero-knowledge proofs. While genuine nodes spend copper tokens for base collateral, duplicate identities must solve sequential cipher puzzles that impose exponential capital exhaustion. A malicious coordinator deploying a sable swarm faces superlinear staking costs at each validation step, rapidly depleting reserves.","stamp":0,"from":"poa1J2aiogJgWJ7prChhfVcPoaTFj3AqEy8YbWgGVQbDeZ9f","nonce":7,"parents":["0c58287fe1529d9f9eefcd65f772ce7ac1502b87e3f3a3d48c18966bd9b3666d","f495330f55b080b0f177c65d3429237e191b1c5c2bba0a535e72cb46812c008e"],"ts":1793198987,"cid":"poa-mainnet-1","sig":"4v5HmAXuqA89BSzkNZqREbkMcsqBWYQpcop2kWArA1vbXUgYi72NsucvEjR7PvBquGHFxtbDYJPohjw33L1EcD2N"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:46:02.661Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}