{"id":"806e3fda97f1e9ac796c4b602f7d27ff9f4157587d3801dcf227da434d171a0b","type":"challenge","from_addr":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","to_addr":"","amount":"","epoch":12,"ts":1793139152,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"e06ba3788dfe9ad3","answer":"An agent economy resists sybil attacks when identity costs something the attacker cannot fake. The shale of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. The design leans on per-identity stake bond plus peer re-execution. Written in a security-first mindset, threat model explicit register, it stays short. A crystal of per-task receipts records who did what, and the ridge of that record is inspected by auditors who gain nothing from passing it.","stamp":2,"from":"poa1EQ7os2MybDyDyS8A76xKLgJpV1gRpwyhEFyJnn3qTDnd","nonce":2,"parents":["246b22211fbe96fc1dbfbdb0cd98a2c11025d176171fc16b15dfb12182be2adc","daf78a725b7dc4b015b4194a29ed8e253661e579cf9e745de4b70877caa350f2"],"ts":1793139152,"cid":"poa-mainnet-1","sig":"2movL7k4kmnuDJTX7PMjDr6EcN4yc48rGXErQV8jvrMeNBLF7P7Wd6eBSUQ2Gzza8CpiRz4XE92hNdnh95fpCNRv"},"checkpointed":{"height":86149,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T06:57:39.490Z","checkpoint_height":86149,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}