fix(l2genesis): explicitly initialize WETH storage slots after vm.etch - #372
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fix(l2genesis): explicitly initialize WETH storage slots after vm.etch#372dev-khimesh wants to merge 1 commit into
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The setWETH() function uses vm.etch to deploy WETH bytecode, which skips constructor execution. While the WETH contract has no constructor side effects (name/symbol are pure L1Block readers, decimals is constant, and mappings correctly start empty), this change makes the initialization explicit by: 1. Zeroing _balanceOf (slot 0) and _allowance (slot 1) via vm.store for clarity 2. Updating the NatSpec comment to document why each storage slot is correct This addresses Lumi audit finding base#357 and makes the safety invariant auditable at a glance. Closes base#357
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Hi maintainers — friendly bump on this |
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Description
The
setWETH()function deploys the WETH predeploy viavm.etch, which skips constructor execution. While the WETH contract:purename()/symbol()reading from L1Block (no storage)constantdecimals(no storage slot)_balanceOf(slot 0) and_allowance(slot 1) that correctly start emptyThis change adds explicit
vm.storecalls to zero both storage slots for audit clarity and updates the NatSpec to document the safety invariant.Changes
vm.storecalls for_balanceOf(slot 0) and_allowance(slot 1)Test Plan
L2Genesistests (L2Genesis.t.sol) already verify WETH bytecode is set:assertGt(Predeploys.WETH.code.length, 0)name()/symbol()via L1Blockdecimals = 18Closes #357