feat: add step network (#2885)

* feat: add step network

* Update index.ts

---------

Co-authored-by: jxom <j@wevm.dev>

.changeset/kind-jokes-impress.md

@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added Step Network.

src/chains/definitions/step.ts

@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const step = /*#__PURE__*/ defineChain({
+  id: 1234,
+  name: 'Step Network',
+  nativeCurrency: { name: 'FITFI', symbol: 'FITFI', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.step.network'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Step Scan',
+      url: 'https://stepscan.io',
+    },
+  },
+  testnet: false,
+})

src/chains/index.ts

@@ -336,6 +336,7 @@ export { shardeumSphinx } from './definitions/shardeumSphinx.js'
 export { shibarium } from './definitions/shibarium.js'
 export { shibariumTestnet } from './definitions/shibariumTestnet.js'
 export { shiden } from './definitions/shiden.js'
+export { step } from './definitions/step.js'
 export { storyTestnet } from './definitions/storyTestnet.js'
 export { silicon } from './definitions/silicon.js'
 export { siliconSepolia } from './definitions/siliconSepolia.js'