fix(StdCheats): enable packed slots when dealing token balances#888
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fix(StdCheats): enable packed slots when dealing token balances#888Yonkoo11 wants to merge 2 commits intofoundry-rs:masterfoundry-rs/forge-std:masterfrom Yonkoo11:fix/deal-enable-packed-slots-293Yonkoo11/forge-std:fix/deal-enable-packed-slots-293Copy head branch name to clipboard
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Tokens that pack balance into a shared storage word (USDC-class, Optimism sUSD) fail stdstore find without packed mode. Use enable_packed_slots() for ERC20/1155/721 balance writes so deal updates only the balance bits and preserves neighboring data. Fixes foundry-rs#293
Yonkoo11
requested review from
0xrusowsky,
DaniPopes,
grandizzy,
mattsse and
onbjerg
as code owners
July 11, 2026 21:18
przyluc012404-netizen
approved these changes
Jul 18, 2026
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Summary
dealwrote balances throughstdstorewithout packed mode. Tokens that store balance in a packed slot (e.g. post-upgrade USDC, Optimism sUSD) failfindor would clobber neighbor fields. Useenable_packed_slots()for balance writes indeal/dealERC1155/dealERC721.Linked issue
Fixes #293
Test plan
test_Deal*suite passestest_DealTokenPackedBalance(balance in low 128 bits; high bits preserved)AI assistance
Prepared with AI assistance; I reviewed and tested the change.
Risk
Packed mode is slightly more expensive on find. Unpacked ERC20s still work (covered by existing tests).