fix(ERC1271InputGenerator): fix code start with 0xef error by adding 0xff as first byte

[xenoliss]

It is possible that the computed replaySafeHash begins with 0xef. In such a case, our implementation, inspired by this example, would result in a contract bytecode also starting with 0xef.

With the London upgrade, create and create2 calls will fail if the deployed bytecode begins with 0xef.

This PR updates the constructor of the ERC1271InputGenerator contract to prefix the returned replaySafeHash with a constant 0xff byte. This prevents the aforementioned error from occurring.

[vegeta321311]

0x331a94dac38795536d418a18cbaaf315d3188684

davyus.eth

twitter X. @Sdavyus

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[cb-heimdall]

Review Error for asslover6996 @ 2024-08-02 12:22:53 UTC
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[cb-heimdall]

Review Error for Sturgeontara06 @ 2024-09-24 21:50:29 UTC
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[cb-heimdall]

Review Error for Sturgeontara06 @ 2024-09-24 21:50:37 UTC
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[Sturgeontara06]

Not sure what to do but need access to my funds

[OKEAMAH]

Y

[cb-heimdall]

Review Error for OKEAMAH @ 2024-09-27 09:32:08 UTC
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[xenoliss]

Closing as outdated.