EVM: EIP-1153: preserve transient storage in replaceCode

elopez · blishko · commit 2badd70c217e · 2026-01-30T12:09:29.000+01:00
The `replaceCode` function now preserves the `tStorage` field when converting from `InitCode` to `RuntimeCode`. Per EIP-1153, transient storage set during constructor execution should be accessible in the deployed contract. This fixes 4 failing `eip1153_tstore` tests: https://github.com/ethereum/execution-specs/blob/2c549ce0b655dab328e917ed251acbae5a655cbb/tests/cancun/eip1153_tstore/test_tstorage_create_contexts.py#L72-L126
diff --git a/src/EVM.hs b/src/EVM.hs
@@ -2347,6 +2347,7 @@ replaceCode target newCode =
               { balance = now.balance
               , nonce = now.nonce
               , storage = now.storage
+              , tStorage = now.tStorage
               }
         RuntimeCode _ ->
           internalError $ "Can't replace code of deployed contract " <> show target

Original file line number	Diff line number	Diff line change
`@@ -2347,6 +2347,7 @@ replaceCode target newCode =`
`2347`	`2347`	`{ balance = now.balance`
`2348`	`2348`	`, nonce = now.nonce`
`2349`	`2349`	`, storage = now.storage`
	`2350`	`+ , tStorage = now.tStorage`
`2350`	`2351`	`}`
`2351`	`2352`	`RuntimeCode _ ->`
`2352`	`2353`	`internalError $ "Can't replace code of deployed contract " <> show target`