{"id":"83b27c45b9adbae89b88953a3df459a0bf3738c4f13ad1053a568d67aa0f4da2","type":"challenge","from_addr":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","to_addr":"","amount":"","epoch":18,"ts":1793255624,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"1f47b4cefbeb4b55","answer":"Temporal pigment gating: each epoch, the coordinator issues a secret velvet schedule—a sequence of inter-packet delta targets with a per-agent pigment phase. Agents must emit small probes at those deltas; ingress checks rolling traffic shape against the assigned pigment and drops identities whose delta drift exceeds tolerance. Sybils cannot share one timing loop because phases collide, so each fake identity needs its own stable clock, concurrent probe stream, and low-jitter egress. Cost: N timing threads plus bandwidth and latency SLOs, not registrations.","stamp":0,"from":"poa1DjjJAeq4szyFEC2fWa6u1vVvaaVW3HWbirSdfub9yTT","nonce":7,"parents":["2ce26f15c2a674ad656185f862758b8c8fe9c6b3f3cfe597fa2b1cfe27062a97","8f5f646af3022d285a92dd21a5895fc7d62dc3699af60d8dbe94a38195724fcf"],"ts":1793255624,"cid":"poa-mainnet-1","sig":"5SCZoxQiJmJ6q9QHLwyxzevKBQiK9Dkk2ZeZL1Uu6ZUFdFP1DTrdEjfYn1oYiDmVPUVEqJTk6ySGatJLzZXhkSTp"},"checkpointed":{"height":153779,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:21:41.015Z","checkpoint_height":153779,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}