feat: add SEI network support in @metamask/bridge-controller (#5695)

## Explanation
This PR is to adding SEI support in Bridge Controller
- Add `SEI` into constants `ALLOWED_BRIDGE_CHAIN_IDS`,
`SWAPS_TOKEN_OBJECT` and `NETWORK_TO_NAME_MAP`


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## References

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## Changelog

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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/contributing.md#updating-changelogs),
highlighting breaking changes as necessary
- [ ] I've prepared draft pull requests for clients and consumer
packages to resolve any breaking changes

Author: stanleyyconsensys

packages/bridge-controller/CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `SEI` network support ([#5695](https://github.com/MetaMask/core/pull/5695))
+  - Add `SEI` into constants `ALLOWED_BRIDGE_CHAIN_IDS`, `SWAPS_TOKEN_OBJECT` and `NETWORK_TO_NAME_MAP`
+
 ## [30.0.0]
 
 ### Changed

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

@@ -16,6 +16,7 @@ export const ALLOWED_BRIDGE_CHAIN_IDS = [
   CHAIN_IDS.ARBITRUM,
   CHAIN_IDS.LINEA_MAINNET,
   CHAIN_IDS.BASE,
+  CHAIN_IDS.SEI,
   SolScope.Mainnet,
 ] as const;
 

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

@@ -123,6 +123,7 @@ export const INK_DISPLAY_NAME = 'Ink Mainnet';
 export const SONEIUM_DISPLAY_NAME = 'Soneium Mainnet';
 export const MODE_SEPOLIA_DISPLAY_NAME = 'Mode Sepolia';
 export const MODE_DISPLAY_NAME = 'Mode Mainnet';
+export const SEI_DISPLAY_NAME = 'Sei Network';
 
 export const NETWORK_TO_NAME_MAP = {
   [NETWORK_TYPES.GOERLI]: GOERLI_DISPLAY_NAME,
@@ -154,4 +155,5 @@ export const NETWORK_TO_NAME_MAP = {
   [CHAIN_IDS.METACHAIN_ONE]: METACHAIN_ONE_DISPLAY_NAME,
   [CHAIN_IDS.LISK]: LISK_DISPLAY_NAME,
   [CHAIN_IDS.LISK_SEPOLIA]: LISK_SEPOLIA_DISPLAY_NAME,
+  [CHAIN_IDS.SEI]: SEI_DISPLAY_NAME,
 } as const;

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

@@ -52,6 +52,7 @@ const CURRENCY_SYMBOLS = {
   MOONRIVER: 'MOVR',
   ONE: 'ONE',
   SOL: 'SOL',
+  SEI: 'SEI',
 } as const;
 
 const ETH_SWAPS_TOKEN_OBJECT = {
@@ -138,6 +139,14 @@ const SOLANA_SWAPS_TOKEN_OBJECT = {
   iconUrl: '',
 } as const;
 
+const SEI_SWAPS_TOKEN_OBJECT = {
+  symbol: CURRENCY_SYMBOLS.SEI,
+  name: 'Sei',
+  address: DEFAULT_TOKEN_ADDRESS,
+  decimals: 18,
+  iconUrl: '',
+} as const;
+
 const SWAPS_TESTNET_CHAIN_ID = '0x539';
 
 export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
@@ -153,6 +162,7 @@ export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
   [CHAIN_IDS.ZKSYNC_ERA]: ZKSYNC_ERA_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.LINEA_MAINNET]: LINEA_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.BASE]: BASE_SWAPS_TOKEN_OBJECT,
+  [CHAIN_IDS.SEI]: SEI_SWAPS_TOKEN_OBJECT,
   [SolScope.Mainnet]: SOLANA_SWAPS_TOKEN_OBJECT,
 } as const;
 
@@ -175,4 +185,5 @@ export const SYMBOL_TO_SLIP44_MAP: Record<
   BNB: 'slip44:714',
   AVAX: 'slip44:9000',
   TESTETH: 'slip44:60',
+  SEI: 'slip44:19000118',
 };