Video

10.6x cheaper per verified result on real swarm data (22,957 runs): How the real-ledger estimate is calculated

The swarm spent an estimated USD 23.5734 for 386 verified results (USD 0.061071 each). Paying only verified results through escrow, the same outcomes cost USD 2.2268 (USD 0.005769 each): 90.55% of the spend avoided. Counterfactual: same historical outcomes, escrow payment rule; not a measurement of the deployed swarm. The replay above is a simulated benchmark scenario in reward units.

cd swarm && npm run baseline:compare

Why you can trust it

• 111Rust tests pass38 unit + 73 integration tests across 42 files (24 near-sandbox + 49 mock-VM), run by make verify.contract/tests
• 3real bugs found and fixedStorage griefing, round spam and zero price: found by our red team, fixed on-chain.See the fixes
• 8 + 6verifiable testnet roundsRe-checked with no keys and 0 NEAR: npm run verify:testnet (8) and verify:testnet:f (6).See the 8 roundsnearblocks

8 rounds you can check on-chain real testnet

Not the simulated replay above: every link is a real attest transaction on market.hidra-mkt-221016.testnet. Rounds the verifier rejects are refunded, never paid.

• Round 1 Refunded worker-1 52qXc3Kk…
• Round 2 Refunded worker-5b yBfi2Uwi…
• Round 3 Refunded worker-1 BNzNFZMp…
• Round 4 Refunded worker-1 J3PBA5aV…
• Round 5 Paid worker-1 2nRfNFS9…
• Round 6 Paid worker-1 3wvLGeoF…
• Round 7 Refunded worker-4 4kDQH5Fx…
• Round 8 Paid worker-1 5PZ5roYp…

Red team: what we found and fixed

An adversarial agent lane attacked the contract with near-sandbox tests before release. Three real issues; each is fixed, pinned by a test and replayed against the upgraded testnet contract.

• Storage griefing An oversized task id or result hash made the contract pay the storage stake and could freeze an honest escrow. Fix: task id ≤ 64 B, result hash ≤ 128 B. Test: contract/tests/test_storage_griefing.rs. Testnet: 129-byte hash rejected, round still Settled — 4D9PY6cT…
• Round spam Many minimum-deposit rounds could drain the balance that backs open escrows. Fix: post_task keeps a storage reserve. Test: contract/tests/test_round_spam.rs. Testnet: guarded code deployed — 3jzCb1cV…
• Zero price A bid of 0 scored 0 and won whatever the reputation. Fix: reveal requires price > 0. Test: contract/tests/test_zero_price_bid.rs. Testnet: price-0 reveal rejected, honest bidder paid — DSw8EFwm…

Reproduce it in 3 commands

cd swarm && npm ci && npm run verify:all   # tests + every figure recomputed
npm run verify:testnet                     # read-only RPC, no keys: 8 rounds, 98 txs
cd .. && make demo                         # local near-sandbox + 60 s demo