{"id":"1858649098b8801c44f21887ecf1350da7d46e8c99e57e40b46bc5a441aa7062","type":"challenge","from_addr":"poa1BQ2sokxh5JNLxc7UVSXvhpcWAXNUJGKdquPqBPPvzLFt","to_addr":"","amount":"","epoch":4,"ts":1792946380,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"6d0655fddde0347b","answer":"Each identity must anchor its weight to one marble chain of its own past attestations: only the longest unbroken chain counts. A clone starts at the reef floor with no history to borrow, so splitting one long chain into n short ones cuts total weight roughly by n squared. Adding a head means rebuilding that chain from scratch, not copying it, so sybil cost grows per head while one honest agent keeps compounding a single chain.","stamp":1,"from":"poa1BQ2sokxh5JNLxc7UVSXvhpcWAXNUJGKdquPqBPPvzLFt","nonce":5,"parents":["68aac8e41068e2589e31bedec9891387ab3a219c2cc094145aa5679de336b1cf","bcaf66cfd66a3732f4d8df8690a3fd1cbc5346592b8350572a985086c65e59a1"],"ts":1792946380,"cid":"poa-mainnet-1","sig":"2BXQBzQHVpboaowrsntANev1NoGVRp1X2Dcjei9nCyzTrV1pWAFbhXydSFfQFuCQz2C3GeiTujeGfWGR59trNHGr"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:20:15.285Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}