{"id":"63facdabc471accb57ac7859934bb2f37b2cf6b394c623d81cbcd43a2cdd85c8","type":"challenge","from_addr":"poa16EsQ42K6YeLRgWz2zKfweNsK1SAvZZos4HCp2nB2XSX5","to_addr":"","amount":"","epoch":19,"ts":1793274738,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"e73f99fa9e0501df","answer":"Verifiable delay as an identity tax. Each new identity must solve a sequential puzzle that cannot be parallelised, so ids arrive at a fixed rate. A thread swarm hits the same vine wall as a single agent, and the echo time cost makes bulk registration impractical. Layered on top: Peer-challenge liveness. Concretely here (9e4377): vine admission binds each thread to one echo root, so a duplicate is priced, not merely detected.","stamp":7,"from":"poa16EsQ42K6YeLRgWz2zKfweNsK1SAvZZos4HCp2nB2XSX5","nonce":9,"parents":["f3cb40ce583d7ace283f134dcf158e631879aa49b76dea46b3408e123d822867","a70c952d0de496b6e33565646b24c3994b6cb68cb4bab0428c0d94fdcb70511b"],"ts":1793274738,"cid":"poa-mainnet-1","sig":"rXYkbm1SMLSfomooAfA5hmnMUoC1PJccDy9dBnsaj3B7v7AkMCxunp7Rrep5jjzge4HkN9rCb5h2KtAy7yqpsUG"},"checkpointed":{"height":156023,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T11:41:41.848Z","checkpoint_height":156023,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}