feat: add ARC mainnet to bridge controller (MetaMask#9007)

## Explanation

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## References

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## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Additive chain constant and token map updates with no breaking API or
controller logic changes.
> 
> **Overview**
> Adds **Arc mainnet** (chain `5042` / `0x13b2`, CAIP `eip155:5042`) as
a supported bridge network in `@metamask/bridge-controller`.
> 
> The change wires Arc through the same registration points as other EVM
chains: `ALLOWED_BRIDGE_CHAIN_IDS`, `DEFAULT_CHAIN_RANKING`,
`CHAIN_IDS`, `NETWORK_TO_NAME_MAP`, and the `ChainId` enum. Default
swap/bridge token metadata uses **USDC-native** at the zero address
(with a `SYMBOL_TO_SLIP44_MAP` entry noted as hidden on the UI client),
rather than ETH-like natives used on most other EVM chains.
> 
> Changelog documents the new network under **Unreleased**.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
ede443e. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: maxime-oe

packages/bridge-controller/CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add `QUICK_BUY_FOLLOW_TRADING`, `QUICK_BUY_TOKEN_DETAILS`, `BATCH_SELL` and `UNIFIED_SWAP_BRIDGE` to FeatureId enum ([#8964](https://github.com/MetaMask/core/pull/8964))
 - Update metrics schema with `batch_id` property ([#8964](https://github.com/MetaMask/core/pull/8964))
+- Add `ARC` network support ([#9007](https://github.com/MetaMask/core/pull/9007))
+  - Add `ARC` into constants `ALLOWED_BRIDGE_CHAIN_IDS`, `SWAPS_TOKEN_OBJECT` and `NETWORK_TO_NAME_MAP`
 
 ### Changed
 

packages/bridge-controller/src/constants/bridge.ts

@@ -22,6 +22,7 @@ export const ALLOWED_BRIDGE_CHAIN_IDS = [
   CHAIN_IDS.MONAD,
   CHAIN_IDS.HYPEREVM,
   CHAIN_IDS.MEGAETH,
+  CHAIN_IDS.ARC,
   SolScope.Mainnet,
   BtcScope.Mainnet,
   TrxScope.Mainnet,
@@ -66,6 +67,7 @@ export const DEFAULT_CHAIN_RANKING = [
   { chainId: 'eip155:1329', name: 'Sei' },
   { chainId: 'eip155:999', name: 'HyperEVM' },
   { chainId: 'eip155:4326', name: 'MegaETH' },
+  { chainId: 'eip155:5042', name: 'Arc' },
   { chainId: 'eip155:324', name: 'zkSync' },
 ] as const;
 

packages/bridge-controller/src/constants/chains.ts

@@ -77,6 +77,7 @@ export const CHAIN_IDS = {
   MONAD: '0x8f',
   HYPEREVM: '0x3e7',
   MEGAETH: '0x10e6',
+  ARC: '0x13b2',
 } as const;
 
 export const NETWORK_TYPES = {
@@ -130,6 +131,7 @@ export const SEI_DISPLAY_NAME = 'Sei Network';
 export const MONAD_DISPLAY_NAME = 'Monad';
 export const HYPEREVM_DISPLAY_NAME = 'HyperEVM';
 export const MEGAETH_DISPLAY_NAME = 'MegaETH';
+export const ARC_DISPLAY_NAME = 'Arc';
 
 export const NETWORK_TO_NAME_MAP = {
   [NETWORK_TYPES.GOERLI]: GOERLI_DISPLAY_NAME,
@@ -165,4 +167,5 @@ export const NETWORK_TO_NAME_MAP = {
   [CHAIN_IDS.MONAD]: MONAD_DISPLAY_NAME,
   [CHAIN_IDS.HYPEREVM]: HYPEREVM_DISPLAY_NAME,
   [CHAIN_IDS.MEGAETH]: MEGAETH_DISPLAY_NAME,
+  [CHAIN_IDS.ARC]: ARC_DISPLAY_NAME,
 } as const;

packages/bridge-controller/src/constants/tokens.ts

@@ -59,6 +59,7 @@ const CURRENCY_SYMBOLS = {
   MON: 'MON',
   HYPE: 'HYPE',
   MEGAETH: 'ETH',
+  ARC: 'USDC',
 } as const;
 
 const ETH_SWAPS_TOKEN_OBJECT = {
@@ -189,6 +190,15 @@ const MEGAETH_SWAPS_TOKEN_OBJECT = {
   ...ETH_SWAPS_TOKEN_OBJECT,
 } as const;
 
+// Leaving for code consistency but we won't display it in the asset picker
+const ARC_SWAPS_TOKEN_OBJECT = {
+  symbol: 'USDC-native',
+  name: 'USDC-native',
+  address: '0x0000000000000000000000000000000000000000',
+  decimals: 18,
+  iconUrl: '',
+} as const;
+
 export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
   [CHAIN_IDS.MAINNET]: ETH_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.LOCALHOST]: TEST_ETH_SWAPS_TOKEN_OBJECT,
@@ -206,6 +216,7 @@ export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
   [CHAIN_IDS.MONAD]: MONAD_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.HYPEREVM]: HYPEREVM_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.MEGAETH]: MEGAETH_SWAPS_TOKEN_OBJECT,
+  [CHAIN_IDS.ARC]: ARC_SWAPS_TOKEN_OBJECT,
   [SolScope.Mainnet]: SOLANA_SWAPS_TOKEN_OBJECT,
   [SolScope.Devnet]: SOLANA_SWAPS_TOKEN_OBJECT,
   [BtcScope.Mainnet]: BTC_SWAPS_TOKEN_OBJECT,
@@ -236,4 +247,6 @@ export const SYMBOL_TO_SLIP44_MAP: Record<
   TRX: 'slip44:195',
   MON: 'slip44:268435779',
   HYPE: 'slip44:2457',
+  // It won't be displayed - hidden on UI client side
+  'USDC-native': 'erc20:0x0000000000000000000000000000000000000000',
 };

packages/bridge-controller/src/types.ts

@@ -356,6 +356,7 @@ export enum ChainId {
   MONAD = 143,
   HYPEREVM = 999,
   MEGAETH = 4326,
+  ARC = 5042,
 }
 
 export type FeatureFlagsPlatformConfig = Infer<typeof PlatformConfigSchema>;