All passed

EVK Vault eUSDC-10

Euler EVK (eVault)Asset USDC0x289F801765B99B5E6263853859fE302dbecaB6d6Monad mainnet

All 30 properties passed at block 111,504,832. No counterexample was found; that is evidence, not a safety guarantee.

Known to the watcher from a backfill scan in block 109,195,820, 2026-09-30 08:28 UTC.

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.

03:40:1210-08Checked
All passed
30 pass, 0 fail, 0 inconclusive, 0 not applicable at block 111,504,832, 1 min. Report
Why: scheduled re-check.
03:31:5110-08Queued
Waiting for a check: scheduled re-check.

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 goes through up to min(maxDeposit, 1e6 tokens); when a smaller amount is refused the bound must go through, and refusals are counted (EIP-4626: maxDeposit MUST NOT be higher than what deposit accepts)
27	`sf-maxMint-honored`test_sf_maxMint_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: mint goes through up to min(maxMint, shares of 1e6 tokens); when a smaller amount is refused the bound must go through, and refusals are counted (EIP-4626: maxMint MUST NOT be higher than what mint accepts)
28	`sf-maxWithdraw-honored`test_sf_maxWithdraw_honoredEIP-4626 MUST	Pass	No counterexample in 16 fuzz runs at this block. Checks: withdraw goes through up to maxWithdraw; when a smaller amount is refused maxWithdraw must go through, and refusals are counted (EIP-4626: maxWithdraw MUST NOT be higher than what withdraw accepts, and MUST be 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 goes through up to maxRedeem; when a smaller amount is refused maxRedeem must go through, and refusals are counted (EIP-4626: maxRedeem MUST NOT be higher than what redeem accepts, and MUST be 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 0x289F801765B99B5E6263853859fE302dbecaB6d6 \
  --standard erc4626 \
  --block 111504832 \
  --runs 16 \
  --seed 0x46632c2cc25656c998d4c1a221c25f9b2577732dd1a1e390b2ddf3a1ea1fe537

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 0x9fdc2b...04ed7b 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/143/0x289f801765b99b5e6263853859fe302dbecab6d6.svg)](/v/143/0x289f801765b99b5e6263853859fe302dbecab6d6)

JSON API Badge SVG

Implementation

Proxy: eip1967-beacon
Implementation: 0xef17750D3a162E28a302E266c474ff8989d60ECD
Implementation key: 0xdd21af250ff5c7001b35031d24abc55fd472370cf156a4146fe35134139c1901
Key from: Implementation behind the proxy: same compiler metadata and same code with immutables masked
Code hash: 0x300569facd04014cc86d84b24d485c981efe1b9a0ec0cebda0cf7861b4536536
Code size: 366 bytes
Same key: 133 other vaults on this board

Run

Block: 111,504,832, Monad mainnet
Seed: 0x46632c2cc25656c998d4c1a221c25f9b2577732dd1a1e390b2ddf3a1ea1fe537
Sender: 0x98E6A31Af65385a39B9644D0e1159351ED0C1c09
Runs: 16 per property
Delta: 0 base units
Forge: forge Version: 1.5.1-Homebrew
forge-std: bf647bd6046f
Reject limit: 4096
Harness: 0xf5d1ee...8d0262
sf properties: 0x1d721e...dfa233
suiteHash: 0x67de68...c66d91
Started: 2026-10-08 03:38 UTC, 75 s
Report: schemaVersion 4

Same implementation

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

and 73 more