useScaffoldWriteContract

Use this hook to send a transaction to your smart contract to write data or perform an action.

const { writeContractAsync: writeYourContractAsync } = useScaffoldWriteContract();

To send the transaction, you can call the writeContractAsync function returned by the hook (which we instance as writeYourContractAsync). Here's an example usage:

<button
  className="btn btn-primary"
  onClick={async () => {
    await writeYourContractAsync({
      contractName: "YourContract",
      functionName: "setGreeting",
      args: ["The value to set"],
      value: parseEther("0.1"),
    });
  }}
>
  Set Greeting
</button>

This example sends a transaction to the YourContract smart contract to call the setGreeting function with the arguments passed in args. The writeContractAsync function (writeYourContractAsync instance) sends the transaction to the smart contract.

Configuration

Parameter	Type	Description
contractName	string	Name of the contract to write to.
functionName	string	Name of the function to call.
args (optional)	any[]	Array of arguments to pass to the function (if accepts any).
value (optional)	bigint	Amount of ETH to send with the transaction (for payable functions only).
onBlockConfirmation (optional)	function	Callback function to execute when the transaction is confirmed.
blockConfirmations (optional)	number	Number of block confirmations to wait for before considering transaction to be confirmed (default : 1).

You can also pass other arguments accepted by useWriteContract wagmi hook.

Return Values

• writeContractAsync function sends the transaction to the smart contract.
• isMining property indicates whether the transaction is currently being mined.
• The extended object includes properties inherited from wagmi useWriteContract. You can check the useWriteContract return values documentation to check the types.