Initial commit: add .gitignore and README

src/utils/rpc.ts

@@ -0,0 +1,42 @@
+import { createRpcClient, createWalletRpcClient } from './chain-config.js';
+import type { PublicClient, WalletClient } from 'viem';
+
+export { createRpcClient, createWalletRpcClient };
+
+export async function getBalance(
+  client: PublicClient,
+  address: `0x${string}`
+): Promise<bigint> {
+  return await client.getBalance({ address });
+}
+
+export async function getTokenBalance(
+  client: PublicClient,
+  token: `0x${string}`,
+  address: `0x${string}`
+): Promise<bigint> {
+  const balance = await client.readContract({
+    address: token,
+    abi: [
+      {
+        name: 'balanceOf',
+        type: 'function',
+        stateMutability: 'view',
+        inputs: [{ name: 'account', type: 'address' }],
+        outputs: [{ name: '', type: 'uint256' }],
+      },
+    ],
+    functionName: 'balanceOf',
+    args: [address],
+  });
+  return balance as bigint;
+}
+
+export async function waitForTransaction(
+  client: PublicClient,
+  hash: `0x${string}`,
+  confirmations: number = 1
+): Promise<void> {
+  await client.waitForTransactionReceipt({ hash, confirmations });
+}
+