fix: getUserOperationHash calculation for EIP-7702 UserOperations (#4197)fix: correct EIP-7702 UserOperation hash calculation

[srivtx]

fixes #4197

Description

This PR fixes the getUserOperationHash calculation for EIP-7702 UserOperations.

Previously, viem was substituting the factory address with the delegate address (authorization.address) during both packing (bundling) and hashing (signing).

This caused a mismatch because:

1. Bundling: Requires the raw factory address 0x7702 (2 bytes) to be present in initCode so the chain recognizes it as an EIP-7702 transaction.
2. Signing/Hashing: Requires the specific delegate address to be hashed in initCode for security.

Changes

• Modified getInitCode to accept an options.forHash parameter.
• Updated toPackedUserOperation to pass this option through.
• Updated getUserOperationHash (v0.6, v0.7) and getUserOperationTypedData (v0.8, v0.9) to pass { forHash: true }.

Verification

• Ran existing tests successfully:
  pnpm test src/account-abstraction/utils/userOperation/getUserOperationHash.test.ts
• Verified that v0.6, v0.7, v0.8, and v0.9 EntryPoints all calculate the correct hash while enabling correct packing for Bundlers.

[changeset-bot]

🦋 Changeset detected

Latest commit: e368bc5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
viem	Patch

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[jxom]

Superseded by 892ebea (your commit is still preserved).