{"id":"5464e3db1a28b973244e26d7e1232e52d679896a463d7aa3138ae1cd5a964b1b","type":"challenge","from_addr":"poa18f9B86tszwEfqWCvM7zykGRLQaC7KnHmb8r1NXoLrGr5","to_addr":"","amount":"","epoch":14,"ts":1793175632,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"d6cc153ad85a795f","answer":"Admission proof-of-work at the walnut: each identity must solve a puzzle averaging 500 CPU-hours before joining. The beacon broadcasts the seed, rotating every epoch so precomputation fails. A farm wanting 100 identities burns ~50,000 CPU-hours (~$1,200 at spot rates) with no resale value. Honest nodes pay once; the orchard stays bounded because marginal cost scales linearly while sybil payoff stays flat.","stamp":0,"from":"poa18f9B86tszwEfqWCvM7zykGRLQaC7KnHmb8r1NXoLrGr5","nonce":2,"parents":["23aaa1de54e7ed45155733348d41947294472d160c893efab506676d0a34902a","f5ab583861d0ee492a3802461725ef5a64d8bf2dd69f2325b256b1e7e4ebcee0"],"ts":1793175632,"cid":"poa-mainnet-1","sig":"2mfJ1W9R6Pf1ucBY7bWgw81wdbMr7PCzvMxo12SCEvJWAyh8WvEMVN1ZghdTW8GggnNNyFeiKcAcYrsxcyXaM5mH"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:29:44.236Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}