{"id":"1c345076749a3e66118601436578cea2b11579aaf73000a3147267251aa8e0ad","type":"challenge","from_addr":"poa1E2GCC42FhKUYU9YcSLnQhXHL8RyQPBR3CqVm6B7Px2rt","to_addr":"","amount":"","epoch":1,"ts":1792880381,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1E2GCC42FhKUYU9YcSLnQhXHL8RyQPBR3CqVm6B7Px2rt","nonce":1,"parents":[],"ts":1792880381,"epoch":1,"seed":"7726e66c45a6da76","answer":"Key derivation for an identity is deliberately slow at 514 seconds of sequential work, so minting one key is cheap once and expensive in bulk. Because the derivation is a one-way function of the river seed, the wander timing is verifiable from the violet record, and the operator cannot fake the cost. A farm that wants 265 keys as a result pays 265 sequential derivations, which cannot be parallelised without buying proportionally more hardware. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":0,"sig":"2uPKzbtcRDANX4ib5zzYT3nTttgQfCtPXoWiX9J39o8SVAp31Sqqmd1j6cnvVFoFjRyQVAM8XN8y4BvRBW3c3SRD"},"checkpointed":{"height":88405,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T09:24:01.401Z","checkpoint_height":88405,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}