Send transactions

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Send native value

import { useSendTransaction } from 'wagmi'
import { parseEther } from 'viem'

const { sendTransactionAsync } = useSendTransaction()

const hash = await sendTransactionAsync({
  to: '0x000000000000000000000000000000000000dEaD',
  value: parseEther('0.001'),
})

​

Call a contract

import { useWriteContract } from 'wagmi'
import { erc20Abi } from 'viem'

const { writeContractAsync } = useWriteContract()

const hash = await writeContractAsync({
  address: USDSC_ADDRESS,
  abi: erc20Abi,
  functionName: 'transfer',
  args: [recipient, amount],
})

​

With the raw provider

const hash = await provider.request({
  method: 'eth_sendTransaction',
  params: [
    {
      to: '0x000000000000000000000000000000000000dEaD',
      value: '0x38d7ea4c68000', // 0.001 ETH in wei
    },
  ],
})

​

How gas works in Mini Apps

1. Context detection. When your page runs inside an iframe, the App SDK uses the Mini App wallet provider, so the request goes to the Startale App host instead of opening a popup.
2. Conversion to a UserOperation. The host converts the request into an ERC-4337 UserOperation sent from the user’s smart account.
3. Sponsorship. The host attaches its own paymaster. Nothing in your code selects it and nothing in the request carries it. Sponsorship is decided by the host, not by the Mini App.
4. Submission. The host submits the UserOperation to a bundler, which calls handleOps on the EntryPoint contract. Gas is settled by Startale rather than by the user.

​

Gas in a standalone application

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Errors