feat: wire debridge to 9 additional evm chains

[gomesalexandre]

Description

Does what it says on the box. deBridge supports these chains that we already have in the codebase but weren't wired up in the swapper mapping. Pure config work - just adding entries to chainIdToDebridgeChainId.

Chains added: Mantle, Cronos, Berachain, Linea, Bob, Sonic, Story, Flow EVM, MegaETH

All chains verified returning valid quotes from deBridge API:

• ETH -> Mantle: ~2,929 MNT per ETH
• ETH -> Cronos: ~26.9M CRO per ETH
• ETH -> Linea: ~0.999 ETH (bridge)
• ETH -> Berachain: ~3.5M BERA per ETH
• ETH -> Sonic: valid quote confirmed

Skipped Solana/Tron for now (non-EVM, needs separate investigation for deposit-address flow).

closes #12139

Risk

Low - config changes behind existing feature flags, no new on-chain interactions.

Testing

Engineering

Verify type-check and lint pass. Verify that DEBRIDGE_SUPPORTED_CHAIN_IDS now includes the 9 new chains by checking the constant derives from the mapping keys.

Operations

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

All 9 chains are gated behind their respective feature flags (VITE_FEATURE_MANTLE, VITE_FEATURE_CRONOS, etc.).

Summary by CodeRabbit

• New Features
  • Added support for 9 additional blockchain networks: Mantle, Cronos, Berachain, Linea, BOB, Sonic, Story, Flow EVM, and Megaeth for swapping operations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 9dc67413-5142-40ec-8eee-e3958c10653c

📥 Commits

Reviewing files that changed from the base of the PR and between ead6a6f and 3cff3f5.

📒 Files selected for processing (1)

• packages/swapper/src/swappers/DebridgeSwapper/constant.ts

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📝 Walkthrough

Walkthrough

Extended the deBridge swapper's chain ID mapping to support nine additional EVM chains: Mantle, Cronos, Berachain, Linea, Bob, Sonic, Story, Flow EVM, and MegaETH. Added corresponding chain ID imports and mapping entries for each chain.

Changes

Cohort / File(s)	Summary
deBridge Chain Support packages/swapper/src/swappers/DebridgeSwapper/constant.ts	Added imports for 9 new chain IDs (mantleChainId, cronosChainId, berachainChainId, lineaChainId, bobChainId, sonicChainId, storyChainId, flowEvmChainId, megaethChainId). Extended chainIdToDebridgeChainId mapping with entries for each chain and their corresponding deBridge chain identifiers.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Nine chains join the bridge so grand,
From Mantle to Sonic, across the land,
Config files updated with care,
New paths for swaps everywhere! 🌉✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: adding deBridge support for 9 additional EVM chains through configuration mappings.
Linked Issues check	✅ Passed	The PR successfully implements all coding requirements from issue #12139: imports 9 chain IDs and adds correct mappings for Mantle, Cronos, Berachain, Linea, Bob, Sonic, Story, Flow EVM, and MegaETH with their deBridge chain IDs.
Out of Scope Changes check	✅ Passed	All changes are in-scope: only the chainIdToDebridgeChainId constant file was modified to add the required EVM chain mappings, with no unrelated alterations.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/debridge-more-chains

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[gomesalexandre]

QA Verification - deBridge quotes on localhost

Ran local dev server on this branch and verified deBridge returns quotes for the new chains.

Test: ETH -> MNT on Mantle via deBridge

• Pay With: 0.01 ETH (~$20.68)
• You Get: 29.41 MNT (~$20.56)
• Protocol: deBridge (confirmed in the UI)
• Rate: 1 ETH = 2,941.38 MNT
• Fee: $0.724

Also verified via deBridge API that all 9 chains return valid quotes:

• Mantle (100000023): 1 ETH -> ~2,929 MNT
• Cronos (100000019): 1 ETH -> ~26.9M CRO
• Berachain (100000020): 1 ETH -> ~3.5M BERA
• Linea (59144): 1 ETH -> ~0.999 ETH (bridge)
• Sonic (100000014): valid quote confirmed

All looking gucci ser.

[NeOMakinG]

✅ Code Review — LGTM

Changes: Add 9 EVM chains to deBridge swapper:

• Mantle, Cronos, Berachain, Linea, Bob, Sonic, Story, Flow EVM, MegaETH

Verification:

• Chain IDs match deBridge's supported chains (verified via API)
• All chains already supported in codebase behind feature flags
• Simple mapping addition, no logic changes
• CI passes ✅

Good expansion of cross-chain bridging support.