Add WETH token on Ethereum

.github/ISSUE_TEMPLATE/token-submission.yml

@@ -1,7 +1,7 @@
 name: Token Submission
 description: Submit a new token to the MegaETH Token List
-title: "[Token] "
-labels: ["token-submission"]
+title: '[Token] '
+labels: ['token-submission']
 body:
   - type: markdown
     attributes:
@@ -37,14 +37,14 @@ body:
     attributes:
       label: Ethereum Address
       description: Leave blank if not deployed on Ethereum
-      placeholder: "0x..."
+      placeholder: '0x...'
 
   - type: input
     id: megaeth-address
     attributes:
       label: MegaETH Address
       description: Leave blank if not deployed on MegaETH
-      placeholder: "0x..."
+      placeholder: '0x...'
 
   - type: dropdown
     id: token-type
@@ -61,7 +61,7 @@ body:
     attributes:
       label: Bridge Address
       description: Required if token is bridged
-      placeholder: "0x..."
+      placeholder: '0x...'
 
   - type: input
     id: website

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,25 +1,30 @@
 ## Token Submission
 
 ### Token Information
+
 - **Token Name**:
 - **Token Symbol**:
 - **Decimals**:
 
 ### Chain Addresses
+
 - [ ] Ethereum: `0x...`
 - [ ] MegaETH: `0x...`
 
 ### Bridge Information (if applicable)
+
 - [ ] This is a **native** token (no bridge)
 - [ ] This is a **bridged** token
   - Bridge Address: `0x...`
 
 ### Checklist
+
 - [ ] Created folder `data/<SYMBOL>/`
 - [ ] Added `data.json` with correct token information
 - [ ] Added `logo.svg` or `logo.png` (256x256 recommended)
 - [ ] Addresses are checksummed (EIP-55)
 - [ ] Token is deployed on specified chain(s)
 
 ### Additional Information
+
 <!-- Any additional context about the token -->

.github/workflows/generate.yml

@@ -21,11 +21,14 @@ jobs:
       - name: Install dependencies
         run: npm install
 
+      - name: Format files
+        run: npm run format
+
       - name: Generate token list
         run: npm run generate
 
       - name: Commit changes
         uses: stefanzweifel/git-auto-commit-action@v5
         with:
-          commit_message: "bot(ci): regenerate token list"
-          file_pattern: "megaeth.tokenlist.json"
+          commit_message: 'bot(ci): regenerate token list'
+          file_pattern: '*.json data/**'

.github/workflows/validate.yml

@@ -30,3 +30,18 @@ jobs:
             exit 1
           fi
           echo "✅ PR only modifies allowed files in data/"
+
+  format-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Check formatting
+        run: npx prettier --check .

.gitignore

@@ -2,3 +2,5 @@ node_modules/
 dist/
 *.log
 .DS_Store
+src/__tests__/
+.claude

.prettierignore

@@ -0,0 +1,5 @@
+node_modules/
+dist/
+package-lock.json
+megaeth.tokenlist.json
+*.svg

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "semi": false,
+  "singleQuote": true,
+  "arrowParens": "always"
+}

README.md

@@ -2,14 +2,12 @@
 
 The official token registry for the MegaETH ecosystem. This repository maintains a curated list of ERC-20 tokens deployed on MegaETH and their corresponding Ethereum mainnet addresses for bridging.
 
-Built following the [Uniswap Token List](https://uniswap.org/blog/token-lists) standard.
-
 ## Supported Chains
 
-| Chain | Chain ID | Type |
-|-------|----------|------|
-| Ethereum | 1 | L1 |
-| MegaETH | 4326 | L2 |
+| Chain    | Chain ID | Type |
+| -------- | -------- | ---- |
+| Ethereum | 1        | L1   |
+| MegaETH  | 4326     | L2   |
 
 ## Adding a Token
 
@@ -42,6 +40,7 @@ Built following the [Uniswap Token List](https://uniswap.org/blog/token-lists) s
 - **Bridged token**: Has `bridge` field with the bridge contract address
 
 Example for a bridged token on MegaETH:
+
 ```json
 {
   "megaeth": {

data/WETH/data.json

@@ -4,6 +4,9 @@
   "decimals": 18,
   "description": "Wrapped Ether on MegaETH",
   "tokens": {
+    "ethereum": {
+      "address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
+    },
     "megaeth": {
       "address": "0x4200000000000000000000000000000000000006"
     }

jest.config.js

@@ -2,4 +2,4 @@ module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
   testMatch: ['**/__tests__/**/*.test.ts'],
-};
+}

megaeth.tokenlist.json

@@ -41,4 +41,4 @@
       "logoURI": "https://raw.githubusercontent.com/megaeth-labs/mega-tokenlist/main/data/WETH/logo.svg"
     }
   ]
-}
+}

package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "generate": "ts-node src/generate.ts",
     "build": "pnpm generate",
-    "test": "jest"
+    "test": "jest",
+    "format": "prettier --write ."
   },
   "keywords": [
     "megaeth",
@@ -19,6 +20,7 @@
     "@types/jest": "^29.5.0",
     "@types/node": "^20.0.0",
     "jest": "^29.7.0",
+    "prettier": "^3.2.0",
     "ts-jest": "^29.1.0",
     "ts-node": "^10.9.2",
     "typescript": "^5.3.0"

src/chains.ts

@@ -11,19 +11,19 @@ export const CHAINS = {
     name: 'MegaETH',
     layer: 2,
   },
-} as const;
+} as const
 
-export type Chain = keyof typeof CHAINS;
-export type L1Chain = 'ethereum';
-export type L2Chain = 'megaeth';
+export type Chain = keyof typeof CHAINS
+export type L1Chain = 'ethereum'
+export type L2Chain = 'megaeth'
 
 // Chain ID lookup
 export const CHAIN_IDS: Record<Chain, number> = {
   ethereum: 1,
   megaeth: 4326,
-};
+}
 
 // L2 to L1 mapping (for bridge relationships)
 export const L2_TO_L1: Record<L2Chain, L1Chain> = {
   megaeth: 'ethereum',
-};
+}

src/generate.ts

@@ -1,50 +1,51 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import { CHAIN_IDS, type Chain } from './chains';
-import type { TokenData, TokenList, TokenListToken } from './types';
+import * as fs from 'fs'
+import * as path from 'path'
+import { CHAIN_IDS, type Chain } from './chains'
+import type { TokenData, TokenList, TokenListToken } from './types'
 
-const DATA_DIR = path.join(__dirname, '..', 'data');
-const OUTPUT_FILE = path.join(__dirname, '..', 'megaeth.tokenlist.json');
-const LOGO_BASE_URL = 'https://raw.githubusercontent.com/megaeth-labs/mega-tokenlist/main/data';
+const DATA_DIR = path.join(__dirname, '..', 'data')
+const OUTPUT_FILE = path.join(__dirname, '..', 'megaeth.tokenlist.json')
+const LOGO_BASE_URL =
+  'https://raw.githubusercontent.com/megaeth-labs/mega-tokenlist/main/data'
 
 function getLogoExtension(tokenDir: string): string | null {
-  const svgPath = path.join(tokenDir, 'logo.svg');
-  const pngPath = path.join(tokenDir, 'logo.png');
+  const svgPath = path.join(tokenDir, 'logo.svg')
+  const pngPath = path.join(tokenDir, 'logo.png')
 
-  if (fs.existsSync(svgPath)) return 'svg';
-  if (fs.existsSync(pngPath)) return 'png';
-  return null;
+  if (fs.existsSync(svgPath)) return 'svg'
+  if (fs.existsSync(pngPath)) return 'png'
+  return null
 }
 
 function readTokenData(symbol: string): TokenData {
-  const dataPath = path.join(DATA_DIR, symbol, 'data.json');
-  const content = fs.readFileSync(dataPath, 'utf-8');
-  return JSON.parse(content) as TokenData;
+  const dataPath = path.join(DATA_DIR, symbol, 'data.json')
+  const content = fs.readFileSync(dataPath, 'utf-8')
+  return JSON.parse(content) as TokenData
 }
 
 export function generate(): TokenList {
   // Read all token directories
   const tokenDirs = fs
     .readdirSync(DATA_DIR)
     .filter((name) => {
-      const stat = fs.statSync(path.join(DATA_DIR, name));
-      return stat.isDirectory();
+      const stat = fs.statSync(path.join(DATA_DIR, name))
+      return stat.isDirectory()
     })
-    .sort();
+    .sort()
 
-  const tokens: TokenListToken[] = [];
+  const tokens: TokenListToken[] = []
 
   for (const symbol of tokenDirs) {
-    const tokenDir = path.join(DATA_DIR, symbol);
-    const tokenData = readTokenData(symbol);
-    const logoExt = getLogoExtension(tokenDir);
+    const tokenDir = path.join(DATA_DIR, symbol)
+    const tokenData = readTokenData(symbol)
+    const logoExt = getLogoExtension(tokenDir)
 
     // Create token entries for each chain
     for (const [chain, chainToken] of Object.entries(tokenData.tokens)) {
-      if (!chainToken?.address) continue;
+      if (!chainToken?.address) continue
 
-      const chainId = CHAIN_IDS[chain as Chain];
-      if (!chainId) continue;
+      const chainId = CHAIN_IDS[chain as Chain]
+      if (!chainId) continue
 
       const token: TokenListToken = {
         chainId,
@@ -53,23 +54,27 @@ export function generate(): TokenList {
         symbol: tokenData.symbol,
         decimals: tokenData.decimals,
         extensions: chainToken.bridge
-          ? { isNative: false, bridgeAddress: chainToken.bridge, bridgeType: 'canonical' as const }
+          ? {
+              isNative: false,
+              bridgeAddress: chainToken.bridge,
+              bridgeType: 'canonical' as const,
+            }
           : { isNative: true },
-      };
+      }
 
       if (logoExt) {
-        token.logoURI = `${LOGO_BASE_URL}/${symbol}/logo.${logoExt}`;
+        token.logoURI = `${LOGO_BASE_URL}/${symbol}/logo.${logoExt}`
       }
 
-      tokens.push(token);
+      tokens.push(token)
     }
   }
 
   // Sort tokens by chainId, then symbol
   tokens.sort((a, b) => {
-    if (a.chainId !== b.chainId) return a.chainId - b.chainId;
-    return a.symbol.localeCompare(b.symbol);
-  });
+    if (a.chainId !== b.chainId) return a.chainId - b.chainId
+    return a.symbol.localeCompare(b.symbol)
+  })
 
   const tokenList: TokenList = {
     name: 'MegaETH Token List',
@@ -80,14 +85,14 @@ export function generate(): TokenList {
       patch: 0,
     },
     tokens,
-  };
+  }
 
-  return tokenList;
+  return tokenList
 }
 
 // Main execution
 if (require.main === module) {
-  const tokenList = generate();
-  fs.writeFileSync(OUTPUT_FILE, JSON.stringify(tokenList, null, 2));
-  console.log(`Generated ${OUTPUT_FILE} with ${tokenList.tokens.length} tokens`);
+  const tokenList = generate()
+  fs.writeFileSync(OUTPUT_FILE, JSON.stringify(tokenList, null, 2))
+  console.log(`Generated ${OUTPUT_FILE} with ${tokenList.tokens.length} tokens`)
 }