Update to libxmtp 4.8.0-dev.7cce4a7

[xmtptools]

This PR updates the iOS bindings to libxmtp version 4.8.0-dev.7cce4a7.

Changes:

• Updated XMTP.podspec version to 4.8.0-dev.7cce4a7
• Updated binary (LibXMTPSwiftFFI) URL and checksum in Package.swift
• Updated Swift source file (xmtpv3.swift)

Base branch: main

[claude]

Claude finished @xmtptools's task —— View job

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Code Review Complete ✅

Summary

This PR updates the libxmtp Swift bindings from version 1.7.0-rc3 to 1.8.0-dev.7cce4a7. The changes are minimal and focused on dependency updates.

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📋 Review Findings

✅ Code Quality & Best Practices

The changes follow standard dependency update practices:

• Binary artifact URL updated in Package.swift:28
• Checksum updated in Package.swift:29
• CocoaPods version updated in XMTP.podspec:3

Observation: The podspec version was simplified from 4.8.0-dev.7cce4a7 (commit 81e91d7) to 4.8.0-dev (commit ed27a25). This appears intentional but creates a minor inconsistency with the Package.swift versioning scheme.

⚠️ Potential Issues

1. Version Inconsistency Between Package.swift and XMTP.podspec

• Package.swift: Uses full commit hash swift-bindings-1.8.0-dev.7cce4a7 in the binary URL
• XMTP.podspec: Uses simplified version 4.8.0-dev without commit hash

Recommendation: Consider documenting the versioning convention difference between SPM and CocoaPods, or align them for consistency.

2. Missing Checksum Verification Documentation
The checksum 2e476eb228994bfdb4bf5531fc183709c251556eba75713967014726c461f05c should be verified against the actual binary at the URL. There's no evidence in the PR of how this checksum was obtained or validated.

Recommendation: Document the process for obtaining/verifying the checksum in your release workflow or PR description.

🔒 Security Concerns

Binary Artifact Integrity: The checksum change is critical for security. The new checksum appears to be properly formatted (64-character hex string), but there's no verification that:

1. The binary at the new URL is legitimate
2. The checksum was computed correctly
3. The binary source is trusted

Recommendation: Ensure your CI/CD pipeline validates that:

• The binary URL is accessible
• The downloaded binary matches the checksum
• The binary is signed/verified from the official libxmtp release

🚀 Performance Considerations

No performance concerns. This is a dependency update that doesn't modify runtime code.

🧪 Test Coverage

Missing: The PR doesn't show:

1. Test execution results with the new binary
2. Verification that existing tests pass
3. Any new tests for features introduced in libxmtp 1.8.0-dev

Recommendation:

• Run the test suite per CLAUDE.md:18: ./script/run_tests.sh
• Validate CocoaPods spec: pod lib lint --allow-warnings
• Document test results in the PR description

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🔍 Additional Observations

1. Commit History: Two commits in this PR:

   • 81e91d7: Updates Package.swift and changes podspec to 4.8.0-dev.7cce4a7
   • ed27a25: Reverts podspec to 4.8.0-dev (removing commit hash)

   This suggests intentional version simplification for CocoaPods.

2. No Source Code Changes: The PR description mentions "Updated Swift source file (xmtpv3.swift)" but the diff shows no changes to this file. This may be an error in the PR description or the changes were reverted.

3. Release Artifact: The CocoaPods spec points to https://github.com/xmtp/xmtp-ios/releases/download/4.8.0-dev/XMTP-4.8.0-dev.zip which may not exist yet if this is a pre-release.

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✅ Approval Recommendation

The changes are structurally sound for a dependency update. However, before merging:

Required:

• Verify the binary URL is accessible and contains the expected artifacts
• Confirm the checksum matches the downloaded binary
• Run full test suite and confirm all tests pass
• Validate CocoaPods spec builds successfully

Optional:

• Document the libxmtp 1.8.0-dev.7cce4a7 changelog/breaking changes
• Update README or documentation if new features are available
• Clarify the podspec version simplification decision

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[macroscopeapp]

Update SwiftPM binaryTarget URL and checksum for LibXMTPSwiftFFI and bump CocoaPods spec to 4.8.0-dev to adopt libxmtp 4.8.0-dev.7cce4a7

Point the SwiftPM binaryTarget to swift-bindings-1.8.0-dev.7cce4a7/LibXMTPSwiftFFI.zip with a new checksum and set the CocoaPods spec version to 4.8.0-dev.

📍Where to Start

Start with the binaryTarget definition in Package.swift, then verify the version change in XMTP.podspec.

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Macroscope summarized ed27a25.