add lachain and latestnet to chains

packages/chains/README.md

@@ -61,6 +61,8 @@ const { chains, provider } = configureChains(
 - `hardhat`
 - `iotex`
 - `iotexTestnet`
+- `lachain`
+- `latestnet`
 - `localhost`
 - `mainnet`
 - `mantle`

packages/chains/src/index.ts

@@ -61,6 +61,8 @@ export { harmonyOne } from './harmonyOne'
 export { haqqMainnet } from './haqqMainnet'
 export { haqqTestedge2 } from './haqqTestedge2'
 export { klaytn } from './klaytn'
+export { lachain } from './lachain'
+export { latestnet } from './latestnet'
 export { linea } from './linea'
 export { lineaTestnet } from './lineaTestnet'
 export { localhost } from './localhost'

packages/chains/src/lachain.ts

@@ -0,0 +1,36 @@
+import { Chain } from './types'
+
+export const lachain = {
+  id: 274,
+  name: 'LaChain',
+  network: 'lachain',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'LaChain',
+    symbol: 'LAC',
+  },
+  rpcUrls: {
+    public: {
+      http: [
+        'https://rpc1.mainnet.lachain.network',
+        'https://rpc2.mainnet.lachain.network',
+      ],
+    },
+    default: {
+      http: [
+        'https://rpc1.mainnet.lachain.network',
+        'https://rpc2.mainnet.lachain.network',
+      ],
+    },
+  },
+  blockExplorers: {
+    etherscan: {
+      name: 'LaChain Explorer',
+      url: 'https://explorer.lachain.network',
+    },
+    default: {
+      name: 'LaChain Explorer',
+      url: 'https://explorer.lachain.network',
+    },
+  },
+} as const satisfies Chain

packages/chains/src/latestnet.ts

@@ -0,0 +1,30 @@
+import { Chain } from './types'
+
+export const latestnet = {
+  id: 418,
+  name: 'LaTestnet',
+  network: 'latestnet',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'LaTestnet',
+    symbol: 'TLA',
+  },
+  rpcUrls: {
+    public: {
+      http: ['https://rpc.testnet.lachain.network'],
+    },
+    default: {
+      http: ['https://rpc.testnet.lachain.network'],
+    },
+  },
+  blockExplorers: {
+    etherscan: {
+      name: 'LaTestnet Explorer',
+      url: 'https://testexplorer.lachain.network',
+    },
+    default: {
+      name: 'LaTestnet Explorer',
+      url: 'https://testexplorer.lachain.network',
+    },
+  },
+} as const satisfies Chain