Simple Payment Application

import { createWalletClient, createPublicClient, http, parseEther, formatEther } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { riseTestnet } from 'viem/chains'
import { sendRawTransactionSync } from 'shreds/viem'
 
// Setup
const account = privateKeyToAccount('0x...')
const walletClient = createWalletClient({
  account,
  chain: riseTestnet,
  transport: http()
})
 
const publicClient = createPublicClient({
  chain: riseTestnet,
  transport: http()
})
 
// Payment function with instant confirmation
async function sendPayment(to: string, amount: string) {
  console.log(`Sending ${amount} ETH to ${to}...`)
  
  try {
    // Get current balance
    const balanceBefore = await publicClient.getBalance({ 
      address: account.address 
    })
    
    // Prepare and sign transaction
    const request = await walletClient.prepareTransactionRequest({
      to: to as `0x${string}`,
      value: parseEther(amount)
    })
    const serializedTransaction = await walletClient.signTransaction(request)
    
    // Send with instant confirmation
    const receipt = await sendRawTransactionSync(publicClient, {
      serializedTransaction
    })
    
    console.log('[SUCCESS] Payment confirmed instantly!')
    console.log('Receipt:', receipt)
    
    // Check new balance
    const balanceAfter = await publicClient.getBalance({ 
      address: account.address 
    })
    
    console.log('Balance change:', 
      formatEther(balanceBefore - balanceAfter), 'ETH'
    )
    
    return receipt
  } catch (error) {
    console.error('[ERROR] Payment failed:', error.message)
    throw error
  }
}
 
// Example usage
await sendPayment('0x742d35Cc6634C0532925a3b844Bc9e7595f6E98d', '0.1')