feat: add Metal L2 (#2270)

* Add metal l2

* Create modern-peaches-fix.md

---------

Co-authored-by: jxom <jakemoxey@gmail.com>

.changeset/modern-peaches-fix.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Metal L2 chain.

src/chains/definitions/metalL2.ts

@@ -0,0 +1,51 @@
+import { chainConfig } from '../../op-stack/chainConfig.js'
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+const sourceId = 1 // mainnet
+
+export const metalL2 = /*#__PURE__*/ defineChain({
+  ...chainConfig,
+  id: 1750,
+  name: 'Metal L2',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Ether',
+    symbol: 'ETH',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.metall2.com'],
+      webSocket: ['wss://rpc.metall2.com'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Explorer',
+      url: 'https://explorer.metall2.com',
+      apiUrl: 'https://explorer.metall2.com/api',
+    },
+  },
+  contracts: {
+    ...chainConfig.contracts,
+    l2OutputOracle: {
+      [sourceId]: {
+        address: '0x3B1F7aDa0Fcc26B13515af752Dd07fB1CAc11426',
+      },
+    },
+    multicall3: {
+      address: '0xcA11bde05977b3631167028862bE2a173976CA11',
+      blockCreated: 0,
+    },
+    portal: {
+      [sourceId]: {
+        address: '0x3F37aBdE2C6b5B2ed6F8045787Df1ED1E3753956',
+      },
+    },
+    l1StandardBridge: {
+      [sourceId]: {
+        address: '0x6d0f65D59b55B0FEC5d2d15365154DcADC140BF3',
+      },
+    },
+  },
+  sourceId,
+})

src/chains/index.ts

@@ -147,6 +147,7 @@ export { mantleTestnet } from './definitions/mantleTestnet.js'
 export { merlin } from './definitions/merlin.js'
 export { metachain } from './definitions/metachain.js'
 export { metachainIstanbul } from './definitions/metachainIstanbul.js'
+export { metalL2 } from './definitions/metalL2.js'
 export { meter } from './definitions/meter.js'
 export { meterTestnet } from './definitions/meterTestnet.js'
 export { metis } from './definitions/metis.js'

src/op-stack/chains.ts

@@ -5,6 +5,7 @@ export { baseGoerli } from '../chains/definitions/baseGoerli.js'
 export { baseSepolia } from '../chains/definitions/baseSepolia.js'
 export { fraxtal } from '../chains/definitions/fraxtal.js'
 export { fraxtalTestnet } from '../chains/definitions/fraxtalTestnet.js'
+export { metalL2 } from '../chains/definitions/metalL2.js'
 export { optimism } from '../chains/definitions/optimism.js'
 export { optimismGoerli } from '../chains/definitions/optimismGoerli.js'
 export { optimismSepolia } from '../chains/definitions/optimismSepolia.js'