feat: add sonic mainnet (#3107)

Co-authored-by: Peng Ke <pk-850@users.noreply.github.com>

.changeset/slow-guests-arrive.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Sonic mainnet.

src/chains/definitions/sonic.ts

@@ -0,0 +1,21 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const sonic = /*#__PURE__*/ defineChain({
+  id: 146,
+  name: 'Sonic',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Sonic',
+    symbol: 'S',
+  },
+  rpcUrls: {
+    default: { http: ['https://rpc.soniclabs.com'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Sonic Explorer',
+      url: 'https://explorer.soniclabs.com',
+    },
+  },
+  testnet: false,
+})

src/chains/index.ts

@@ -387,6 +387,7 @@ export { sketchpad } from './definitions/sketchpad.js'
 export { snax } from './definitions/snax.js'
 export { snaxTestnet } from './definitions/snaxTestnet.js'
 export { soneiumMinato } from './definitions/soneiumMinato.js'
+export { sonic } from './definitions/sonic.js'
 export { sonicTestnet } from './definitions/sonicTestnet.js'
 export { songbird } from './definitions/songbird.js'
 export { songbirdTestnet } from './definitions/songbirdTestnet.js'