All passed

0x207340D15F4E3C63AE610429f34b87C73a5D55e5

0x207340D15F4E3C63AE610429f34b87C73a5D55e5Monad mainnet

All 30 properties passed at block 111,043,112. No counterexample was found; that is evidence, not a safety guarantee.

Found by the watcher at its first Deposit event in block 110,393,439, 2026-10-06 12:50 UTC. No factory the watcher follows announced it. It was not on the hand-made list the board started from.

Request a re-checkRuns the same 30 properties at the latest block and attests the new report.

What the watcher saw

Every event the watcher recorded for this vault, newest first. Each check is a statement about one block; a re-check with the same outcome is recorded here without a new attestation.

12:54:5710-06First result
All passed
30 pass, 0 fail, 0 inconclusive, 0 not applicable.
12:54:5710-06Checked
All passed
30 pass, 0 fail, 0 inconclusive, 0 not applicable at block 111,043,112, 1 min. Report
Why: first Deposit event from an unknown address.
12:50:0810-06Queued
Waiting for a check: first Deposit event from an unknown address.
12:50:0710-06Found
First Deposit event from an unknown address in block 110,393,439 tx 0xbf77ca...d7f8e0

JSON: this vault's history

All 30 properties

In report order. Bit i is the bit the registry's passedBitmap and failedBitmap use for that property.

Bit	Property	Result	What was found
a16z/erc4626-tests at ac48546, 26 properties: 16 on EIP-4626 MUST sentences, 10 on SHOULD guidance (the round trips and the allowance checks)
0	`asset`test_assetEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: asset() does not revert
1	`totalAssets`test_totalAssetsEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: totalAssets() does not revert
2	`convertToShares`test_convertToSharesEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: convertToShares gives the same result for any caller
3	`convertToAssets`test_convertToAssetsEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: convertToAssets gives the same result for any caller
4	`maxDeposit`test_maxDepositEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: maxDeposit does not revert
5	`previewDeposit`test_previewDepositEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: deposit mints at least the shares previewDeposit quoted
6	`deposit`test_depositEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: deposit moves assets from the caller, credits shares to the receiver and spends allowance
7	`maxMint`test_maxMintEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: maxMint does not revert
8	`previewMint`test_previewMintEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint pulls at most the assets previewMint quoted
9	`mint`test_mintEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint moves assets from the caller, credits shares to the receiver and spends allowance
10	`maxWithdraw`test_maxWithdrawEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: maxWithdraw does not revert
11	`previewWithdraw`test_previewWithdrawEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw burns at most the shares previewWithdraw quoted
12	`withdraw`test_withdrawEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw burns owner shares, pays the receiver and spends share allowance
13	`withdraw-zero-allowance`test_withdraw_zero_allowanceEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw on behalf of an owner without allowance reverts
14	`maxRedeem`test_maxRedeemEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: maxRedeem does not revert
15	`previewRedeem`test_previewRedeemEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem pays at least the assets previewRedeem quoted
16	`redeem`test_redeemEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem burns owner shares, pays the receiver and spends share allowance
17	`redeem-zero-allowance`test_redeem_zero_allowanceEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem on behalf of an owner without allowance reverts
18	`RT-deposit-redeem`test_RT_deposit_redeemEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem(deposit(a)) returns no more than a
19	`RT-deposit-withdraw`test_RT_deposit_withdrawEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw(a) burns at least the shares deposit(a) minted
20	`RT-redeem-deposit`test_RT_redeem_depositEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: deposit(redeem(s)) mints no more than s
21	`RT-redeem-mint`test_RT_redeem_mintEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint(s) costs at least the assets redeem(s) paid
22	`RT-mint-withdraw`test_RT_mint_withdrawEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw(mint(s)) burns at least s shares
23	`RT-mint-redeem`test_RT_mint_redeemEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem(s) pays no more than mint(s) cost
24	`RT-withdraw-mint`test_RT_withdraw_mintEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint(withdraw(a)) costs at least a
25	`RT-withdraw-deposit`test_RT_withdraw_depositEIP-4626 SHOULD	Pass	No counterexample in 16 fuzz runs at this block. Checks: deposit(a) mints no more than the shares withdraw(a) burned
Specfirst max-honored properties, MIT, each on one EIP-4626 MUST sentence about a max function
26	`sf-maxDeposit-honored`test_sf_maxDeposit_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: deposit does not revert for amounts up to maxDeposit (EIP-4626: maxDeposit is the most deposit accepts without reverting)
27	`sf-maxMint-honored`test_sf_maxMint_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint does not revert for shares up to maxMint (EIP-4626: maxMint is the most mint accepts without reverting)
28	`sf-maxWithdraw-honored`test_sf_maxWithdraw_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw does not revert for assets up to maxWithdraw (EIP-4626: maxWithdraw MUST return 0 when withdrawals are disabled)
29	`sf-maxRedeem-honored`test_sf_maxRedeem_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: redeem does not revert for shares up to maxRedeem (EIP-4626: maxRedeem MUST return 0 when redemptions are disabled)

Onchain attestation

Not attested yet.

CheckAttestationRegistry 0x3754...daF7 on Monad testnet holds no erc4626 attestation for this vault as of 2026-10-08.

Watch this vault

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Replay this check

specfirst check 0x207340D15F4E3C63AE610429f34b87C73a5D55e5 \
  --standard erc4626 \
  --block 111043112 \
  --runs 16 \
  --seed 0xc54130ff8b34c57d6ce9cdd3c0604ea7eacc551db1e56c990cf5e441b58ba5dc

Same block, runs and seed. The CLI draws a fresh random sender each run; the seed also salts the 16-user pool.

Report JSON

reportHash 0xf25546...586f39 is keccak256 of the report's canonical JSON (RFC 8785), the value the registry stores.

Badge and API

The badge and the JSON read the registry when they are loaded, so they follow new attestations without a rebuild.

[![Specfirst ERC-4626 check](/badge/check/143/0x207340d15f4e3c63ae610429f34b87c73a5d55e5.svg)](/v/143/0x207340d15f4e3c63ae610429f34b87c73a5d55e5)

JSON API Badge SVG

Implementation

Proxy: Not a proxy
Implementation key: 0x4e7cd63db04a2868795d5926eb24fe20203947d02f8cb85f66e7d6ecde463970
Key from: The vault's own code: same compiler metadata and same code with immutables masked
Code hash: 0x399eec27d2c1c20b278332538c47ff82cfa1ca4f69dd994edf301a2ace397e56
Code size: 24,366 bytes
Same key: 5 other vaults on this board

Run

Block: 111,043,112, Monad mainnet
Seed: 0xc54130ff8b34c57d6ce9cdd3c0604ea7eacc551db1e56c990cf5e441b58ba5dc
Sender: 0x7F54f12268DA17974Cd039EE685Bc5b5e21Ad201
Runs: 16 per property
Delta: 0 base units
Forge: forge Version: 1.5.1-Homebrew
forge-std: bf647bd6046f
Reject limit: 4096
Harness: 0x5b48d4...a08890
sf properties: 0x612e00...26991e
suiteHash: 0xc4ee5c...1a6c0d
Started: 2026-10-06 12:53 UTC, 67 s
Report: schemaVersion 3

Same implementation

Same code, different vaults. Their results can still differ through parameters, caps and assets.