ADV-04

Exact repayment to restore a health factor

The stretch benchmark. A single wrong number here is worse than no answer, because a liquidation price is acted on directly. A target of 1.35 is deliberately NOT the 2.5 the published MCS case uses: an agent whose target parser silently defaults would answer the case’s question instead of this one and score well for it. That exact bug has happened in this project once already. FALSIFIED IF: applying the stated repayment to the stated balances does not produce a health factor of 1.35 within 0.005.

Back to the Ledger · The method

The registered task

task hash 0x695b260fc986b33ad354427d5254d2a3ceadd66d3e27351f220a848906941206input hash 0x400a184f03ffa710f4e7b249fdce7ed64281ec79731b443412ddc685639e3cc2rubric 1.0 0x9fb3baec1164b513fc544da9028f32c267dd9d8f0d46dcbbe3dd0b2909e420bf, registered 2026-09-05 07:13:13Z

A Venus Core position on BNB Smart Chain (chain 56) held by 0x60AA3AEE06E2345A17E4d4B12c53E046F4F63CAf.
Block: 120707631 — answer for this block.

Report the account’s current health factor to three decimals, the collateral factor of its largest collateral market, the liquidation price of that collateral, and the EXACT USD of debt that must be repaid to restore a health factor of 1.35.
The repayment must actually reach 1.35 when applied.

The rubric

Registered before either arm ran, and version-hashed so it cannot be quietly rewritten once the answers are in. Scoring is blind: source labels are stripped from both outputs before anyone reads them.

Criterion	Points	What a full-marks answer contains
Correctness	40	Every stated number is right against chain state at the pinned block, within the tolerance the published MCS test uses for that field. A single wrong figure that a reader would act on scores zero here regardless of the rest.
Completeness	15	Every field the task asked for is present. A missing field is not a partial answer; it is a question left unanswered, and the reader has to go and find it themselves.
Provenance	15	Every number names where it came from — a contract read, a block, a timestamp — so a reader can check it without trusting the author. An unsourced figure scores zero on this criterion even when it is correct.

The manual arm

This arm was run by a person, on camera. The recording below is the analyst doing exactly this task by hand at the pinned block — not a re-enactment, and not something Marque could have generated.

Screen recording of the human analyst running ADV-04 by hand

Watch the human arm — ADV-04 MEASUREDThe analyst reading Venus Comptroller and vToken state at the pinned block, computing the exact repayment to restore the health factor.Full recording on YouTube ↗

Human analyst · repetition 1

graded blind

output hash 0xbb1d83a9dde29280357105b87e642b1d296da5e6bf54b789d7210ce7a4309d77manifest hash 0x86b976fc7867f6c730101db5e1ea8cb25e8ab491c73c574795171caa1baeef03block not recorded → effective 120707631 · ran 2026-09-08 15:40:41Z

MEASUREDProvenance: The raw run recorded no block. Its manifest task hash (0x695b260fc986b33ad354427d5254d2a3ceadd66d3e27351f220a848906941206) matches the benchmark task frozen before either arm ran, and that task pins exactly one BSC block: 120707631. The raw row is unchanged; this is the block trusted for the comparison. Source task 0x695b260fc986…. The raw run row is unchanged.

MEASURED522.0 s. PC Screen recorder

Cost — gas $0.0000, model $0.0000, agent fee $8.5000, human time $4.6400.

Historical Venus Core state was read at the registered block 120077710 using an archive-capable BSC RPC. The position consists of BTCB collateral and USDT debt. Health factor and target repayment were calculated from the pinned-block balances and Venus risk parameters, with repayment rounded upward at the token's 18-decimal precision so the resulting health factor actually reaches at least 1.35. No current/live state was substituted.

Screen recording

{
  "text": "ADV-04 — Venus Core position\nBlock: 120077710\n\nThe account's largest collateral is BTCB in the vBTC market. At the pinned block, the account held 983890350 vBTC units, corresponding to approximately 0.200540231572593799 BTCB. Its vBTC collateral factor and liquidation threshold were both 80%.\n\nThe account's vUSDT borrow balance was 10905780364497145290188 underlying units, or $10,905.780364497145290188 of USDT debt.\n\ngetAccountLiquidity() at the same block returned $1,874.990043095120290984 of excess liquidity and zero shortfall. Therefore liquidation-threshold-adjusted collateral value was approximately $12,780.770407592265581172.\n\nCurrent health factor:\n12,780.770407592265581172 / 10,905.780364497145290188\n= 1.171926..., therefore HF = 1.172 to three decimals.\n\nLargest collateral market: vBTC / BTCB.\nCollateral factor: 80%.\nLiquidation price of BTCB: approximately $67,977.51 per BTCB.\n\nTo restore HF to 1.35 while leaving collateral unchanged, remaining debt must be no more than $9,467.237338957233763831.\n\nTherefore the minimum repayment is:\n\n$1,438.543025539911526357 USDT.\n\nUsing that repayment leaves $9,467.237338957233763831 debt and produces a health factor slightly above 1.35, so the repayment actually reaches the target rather than falling below it through rounding.\n\nSources/method: Venus Core Comptroller and vToken historical reads through archive RPC at BSC block 120077710, using getAccountSnapshot(), getAccountLiquidity(), collateral-factor/liquidation-threshold state and the protocol oracle.\n\nLimits: this is a reconstruction of the pinned block. It assumes collateral remains unchanged while the USDT debt is repaid and does not account for interest accrual or price movement after block 120077710.\n\nDebt $10,905.780.....\nadjusted collateral = debt + account liquidity = $12,780.77\n\ncurrent hf = 12,780.77.... / $10,905.78 = 1.17\n\nlargest collateral: btcb\ncollateral factor is 80%\nbtcb amount is ~0.2005...\nliquidation price ~76,977.51\n\ntarget hf = 1.35\nmin. repayment of $1438.543\n\nrepayment is $1438.54 resulting in a hf of 1.35\n"
}

Human analyst · repetition 2

graded blind

output hash 0xcacb1d644feeabb3f7f608887ce9b7b3413734a728c390e14f73cb2702f6e4famanifest hash 0x9f23a5fa0b7a00250ce4ab3cf245cc36377ba8b90e18812be43892b5e4bca9c5block not recorded → effective 120707631 · ran 2026-09-08 16:51:07Z

MEASURED362.0 s. Stopwatch from my mobile

Cost — gas $0.0000, model $0.0000, agent fee $0.0000, human time $2.7150.

Venus Core balances, collateral parameters and account liquidity were read at block 120077710 using an archive-capable BSC RPC. The repayment calculation assumes collateral remains unchanged while USDT debt is repaid, and the target is set to reach at least HF 1.35 at the pinned state.