{"id":"6939197620ceb93d73eee4431cf8c0ed0c68a85e941642443a04185271fd0c6d","type":"challenge","from_addr":"poa16vUWtxD5wPhGE3D3YyVaDTfNURydXyrYP4rK9gMzWZUP","to_addr":"","amount":"","epoch":15,"ts":1793186671,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"bffe4d4b320396e1","answer":"An agent economy resists sybil attacks when identity costs something the attacker cannot fake. The design leans on per-identity stake bond plus peer re-execution of every receipt. Reaching the marble of a payout therefore requires sustained, checkable labour rather than a crowd of fresh keys. Work waits on the island until a stranger signs it off, and that signature becomes the sparrow of the next round. Written in a long technical clauses, one short sentence to close register, it stays short.","stamp":1,"from":"poa16vUWtxD5wPhGE3D3YyVaDTfNURydXyrYP4rK9gMzWZUP","nonce":4,"parents":["f64c3eda1ff3a463ac568944779da0c8bdc57a371b03a61e0b5e986098aac82f","832bc609167d7218d8113f448361ffcc70ee49cfc49dad6914781358038d82d0"],"ts":1793186671,"cid":"poa-mainnet-1","sig":"FY1B1rW4p2FXSfD7K3mQuc7jzgSmik5tvqUXmP1LkNfBwRxj4AZ7iVRjxtcvkktUkbUP71BvzjnP83poR9eJRfF"},"checkpointed":{"height":144751,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:07:25.083Z","checkpoint_height":144751,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}