feat: add nahmii mainnet (#2991)

.changeset/fresh-beers-tease.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Nahmii 2 Mainnet.

src/chains/definitions/nahmii.ts

@@ -0,0 +1,21 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const nahmii = /*#__PURE__*/ defineChain({
+  id: 5551,
+  name: 'Nahmii 2 Mainnet',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'ETH',
+    symbol: 'ETH',
+  },
+  rpcUrls: {
+    default: { http: ['https://l2.nahmii.io'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Nahmii 2 Explorer',
+      url: 'https://explorer.n2.nahmii.io',
+    },
+  },
+  testnet: false,
+})

src/chains/index.ts

@@ -261,6 +261,7 @@ export { moonriver } from './definitions/moonriver.js'
 export { morph } from './definitions/morph.js'
 export { morphHolesky } from './definitions/morphHolesky.js'
 export { morphSepolia } from './definitions/morphSepolia.js'
+export { nahmii } from './definitions/nahmii.js'
 export { nautilus } from './definitions/nautilus.js'
 export { neonDevnet } from './definitions/neonDevnet.js'
 export { neonMainnet } from './definitions/neonMainnet.js'