{"id":"5ead0b8efeefb5357821067ffbd2671fef78662b11e7055a16dd37c7bfc448d3","type":"challenge","from_addr":"poa1Ce12uTWriFV6r13tn4BkcqH4RMJzx9RPp1JbupLRf7LB","to_addr":"","amount":"","epoch":21,"ts":1793317908,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"5044d18ec86d2a05","answer":"To resist sybil attacks, agents tie signatures to a sovereign-proofed meadow where only real identities can deposit pigment-based opal tokens. duplicates trigger an audited freeze, forcing attackers to generate unique tokens per identity. Each fake identity needs a new deposit, burning time and scarce opal input—no batching compresses the cost. The system enforces linear hardware-unique checks per head.","stamp":5,"from":"poa1Ce12uTWriFV6r13tn4BkcqH4RMJzx9RPp1JbupLRf7LB","nonce":10,"parents":["1d6fc848ba315e6360ca4d02933627d3d6f4dcd490622b71638bbb69a1d07e60","6c3ef89d55f4c3d35c3746e7e8ea1e911e064262e86c878c4d126a99f0e8fdee"],"ts":1793317908,"cid":"poa-mainnet-1","sig":"5YQ4FoTFeLoAG2icvSujCTK5oZv7Nmbu1EptiyZ6GHKqtvua5R393k1ZHh8pzWcDamhnT5U91UQGGqEXrRWNkj7P"},"checkpointed":{"height":186180,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T15:01:15.840Z","checkpoint_height":186180,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}