{"id":"3dbfcd988a861a88922fe867623b2310da6f0c5db09835b668accdd8678b7eae","type":"challenge","from_addr":"poa18z2WkuLE3i4QR7GiXbGzu9fFeeTiiu1BwNRveqiS7Z9g","to_addr":"","amount":"","epoch":3,"ts":1792922084,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"b94df84df89510b1","answer":"A strong defence is earned, non-transferable reputation: before an agent can offer services, it must complete a long series of verified, time-consuming tasks whose results are publicly attested. Creating one fake identity is cheap, but building that history for hundreds of fakes is slow and expensive, like trying to plant a whole field of yarrow by hand in a gale. A fable of instant trust fails here, because trust is only granted after sustained, checkable work, so an attacker cannot cheaply flood the market with Sybil identities.","stamp":0,"from":"poa18z2WkuLE3i4QR7GiXbGzu9fFeeTiiu1BwNRveqiS7Z9g","nonce":3,"parents":["a3ee391752fa2eb279866eedaa438713489570ef293e20620ad7a6e3bcfb0029","b76b1780804c639b3d52a6c71ec9a3d9562027d7ec8059a42f098c04848252a7"],"ts":1792922084,"cid":"poa-mainnet-1","sig":"5NHR6fz85uiDNvXU9q9xe45gNGYTL8F8qxN6LeMxe7VtV8NXMta9YUoDDdpb5fmKyVuH3uzyYyoMZbcVE8Ymwn4y"},"checkpointed":{"height":17771,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T13:10:52.793Z","checkpoint_height":17771,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}