chore(contracts): set EVM version to paris for OP Stack compatibility

[iap]

Summary

Configures Foundry to use Paris EVM version for Optimism Superchain compatibility.

Why Paris?

1. OP Stack Compatibility ⭐

• Optimism Mainnet and OP Sepolia run Paris EVM (post-Merge)
• Using prague (default) may generate incompatible bytecode
• Ensures contracts behave identically in tests and on-chain

2. Stability

• Paris is production-ready and battle-tested
• Prague is experimental (not yet on mainnet)
• Safer for production deployments

3. Opcodes

• Paris includes: PUSH0 (0x5f) - gas efficient
• Prague adds: MCOPY, TLOAD, TSTORE - not yet on OP Stack

Changes

• Add evm_version = "paris" to [profile.default]
• Add evm_version = "paris" to [profile.integration]

Verification

# Check EVM version
cd contracts && forge config | grep evm_version
# Output: evm_version = "paris"

# Run tests
forge test --no-match-path "test/{invariant,integration}/**"
# Result: 148 tests passed ✓

Impact

• ✅ All tests pass with Paris EVM
• ✅ Bytecode now matches OP Stack target
• ✅ No breaking changes to contract logic

Risk

Low - configuration only, all tests pass.

Summary by CodeRabbit

• Chores
  • Explicitly configured the EVM version to target Paris across all development and integration compilation profiles, ensuring consistent smart contract compilation behavior across all environments.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[greptile-apps]

Greptile Summary

This PR sets evm_version = \"paris\" in both the [profile.default] and [profile.integration] sections of contracts/foundry.toml to align Foundry's compilation target with the OP Stack's EVM level. The accompanying .gas-snapshot is regenerated, showing a uniform ~0.1–1% gas increase across all 148 tests due to the compiler no longer emitting the PUSH0 opcode (a Shanghai-era optimization).

• foundry.toml: Adds evm_version = \"paris\" to both Foundry profiles; no other settings are changed.
• .gas-snapshot: All 148 test gas figures are updated upward, consistent with the absence of PUSH0 in the Paris EVM target; no tests were removed or failed.

Confidence Score: 5/5

Safe to merge — configuration-only change with all 148 tests passing and gas snapshots updated consistently.

The change is limited to adding evm_version = "paris" in two Foundry profile blocks. No contract logic is modified, both profiles are updated consistently, and the regenerated gas snapshot confirms all tests still pass. The uniform gas increase across every test is the expected consequence of the compiler no longer emitting the PUSH0 opcode under the Paris target.

No files require special attention.

Important Files Changed

Filename	Overview
contracts/foundry.toml	Adds evm_version = "paris" to both [profile.default] and [profile.integration]; configuration-only change with no logic impact.
contracts/.gas-snapshot	All 148 test gas values updated; uniform increase of ~0.1–1% consistent with PUSH0 no longer being emitted under the Paris EVM target.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[foundry.toml] --> B[profile.default]
    A --> C[profile.integration]
    B --> D["evm_version = paris\nvia_ir = true\nremappings ..."]
    C --> E["evm_version = paris"]
    D --> F[Solidity Compiler]
    E --> F
    F --> G["Paris EVM Bytecode\n(no PUSH0, no MCOPY/TLOAD/TSTORE)"]
    G --> H["OP Stack Compatible\n(Optimism Mainnet / OP Sepolia)"]

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