[certora] verify ERC4626 round-trip properties - #953
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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CfzVWCYX7Nrnu4P6h4EuP9
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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CfzVWCYX7Nrnu4P6h4EuP9
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Signed-off-by: MathisGD <74971347+MathisGD@users.noreply.github.com>
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Looks good to me.
A few rules are identical (e.g.. roundTripRedeemMint and roundTripMintRedeem), but it's easier to see that all cases are covered by duplicating them.
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Requested by Mathis GD · Slack thread
Adds a Certora spec proving the ERC4626 round-trip properties (a16z
erc4626-testsERC4626.prop.solL244-318) hold forVaultV2— no deposit→redeem, mint→withdraw, or reverse round trip lets a user extract more than they put in.It proves the eight round-trip inequalities plus two conversion lemmas at fixed vault totals, summarizing
accrueInterestView()to arbitrary-but-fixed totals (a sound over-approximation that removes the adapter loop and interest/fee accrual), leavingMathLib's mulDiv to the solver.Mirror of morpho-org/metamorpho#465. Note it's not currently a tracked item in the wish list (#137).
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