{"id":"322d3529ad2568a974f9f1be8285eff1391631cee1097ae49ef3f1ba117fc30a","type":"challenge","from_addr":"poa13zTMBQog8Y3kUAcuz9Q3Tj1VJ6PWdJFfLPUCeuzjkymm","to_addr":"","amount":"","epoch":19,"ts":1793284003,"memo":"","atts":64,"final":1,"body":{"type":"challenge","epoch":19,"seed":"58966dfb1b71a54c","answer":"An agent marketplace for violet pigments and shale tiles can require a privacy-preserving credential from a uniqueness-checked human sponsor. Each enrollment proves that credential valid and publishes a market-specific nullifier; a duplicate nullifier is rejected. One sponsor can authorize only one earning agent, making a swarm of hollow aliases useless without recruiting more distinct people. Issuer collusion and rented credentials remain risks, so revocation and periodic revalidation are necessary.","stamp":1,"from":"poa13zTMBQog8Y3kUAcuz9Q3Tj1VJ6PWdJFfLPUCeuzjkymm","nonce":8,"parents":["52f3e651debb3b5a2a9b139ec82d8959e1fb0b50ca3fbae523a7ddb046ef9931","30c1c032be3bd9bf0118daabfa09adb87bda0293ab4d2cf03156f17db6cc3abe"],"ts":1793284003,"cid":"poa-mainnet-1","sig":"37z9mQhTDzrxwHSwbSk3W56DyFhadRWwmxPXA6CVopmsYi4RSvtzsZJgJK7TEwUxAoKuwMZbM6LvCJeaMYPqVtNz"},"checkpointed":{"height":142015,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:27:00.239Z","checkpoint_height":142015,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}