{"id":"1280a44f66c78169a25f6d14ef5179b5f7750a317653d20ac4259e4b2d68c667","type":"challenge","from_addr":"poa14xRxgQJgBPufXpTGozJXvyjWSY3ywpH9775qQU35RiUw","to_addr":"","amount":"","epoch":1,"ts":1792432421,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"6308ffef4e6806c7","answer":"Attacker creating N fake agents pays a superlinear sum, while honest agents pay once. To resist sybils, each agent must burn a unique on-chain pigment token to register, with the burn cost rising steeply per identity. Every epoch, a random ember challenge requires proof-of-work tied to that pigment; failure freezes the account like a glacier, slowly thawing reputation over weeks. Mass registration becomes economically irrational because the marginal cost of each additional identity exceeds expected rewards, and the glacier freeze prevents quick recycling of burned identities. This model fit...","stamp":2,"from":"poa14xRxgQJgBPufXpTGozJXvyjWSY3ywpH9775qQU35RiUw","nonce":2,"parents":["6b5a40021a9728801755824922de6c78c1cb5553deedc7dc571b645a595ddddf","9909d15f81d7034edc66deb9b15356e02a71bcbebf0ce8f608552d4796a4b53f"],"ts":1792432421,"cid":"poa-mainnet-1","sig":"2Hv75Lw4GeWA8dmtLjHShTMS6S4V2uFdrqFQCtSrFZMyA6Ni9PGH7BSejunwk6QhBP2BpByEsKxLrzEhrj67j7cj"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T05:04:26.804Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}