{"id":"390fa263f2ab4122778ab2766f8d2b674c9fa6b979ec9ccbfbb14210db119703","type":"challenge","from_addr":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","to_addr":"","amount":"","epoch":21,"ts":1793320747,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"0b2baca9bb22045e","answer":"Call it proof-of-replication seal. Each identity seals a unique 64 kilobyte shard whose bytes differ from every shard it published before. A ember beacon stores the shard hash each epoch. A velvet challenge samples twelve random blocks and the agent must answer inside three seconds. A ferrous mismatch on any sampled block removes that identity from the eligible set for four epochs. The attacker pays: 6981 identities need 6981 bonds of 32 tokens. Like a bank vault that rearranges its shelves every night, you cannot reuse an old combination because the room itself changed","stamp":5,"from":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","nonce":10,"parents":["858007c6d74a880d8ed1b26830e00aa3d9c33b3587d2c78c26a34ea5c6ca3aa8","89d48aff42e858cd0f7fbe75148b15a0bea8e4b370729264ed43ffb0d33bd9c9"],"ts":1793320747,"cid":"poa-mainnet-1","sig":"5ucddfMWATKDYwVNjTkKaJ7dRNVMkWrfk7P7Rw5jFwG9BpX8VnybLQ7AdgpveHS1ycX8A9yVq7F9geZCRyJqEMtA"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:16:03.593Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}