useContractWrite

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

const { write: writeYourContractAsync } = useContractWrite({
  abi: [YourContractABI],
  address: "0xabca6bf26964af9f7eed9e03e53415d37aa90123",
  functionName: "setGreeting",
});

The following configuration options can be passed to the hook:

Configuration

Parameter	Type	Description
abi	object[]	ABI of the contract to read from.
address	string	Address of contract to read from.
functionName	string	Name of the function to be called.
args (optional)	unknown[]	Arguments for the function.
value (optional)	bigint	Value in ETH that will be sent with transaction.
blockConfirmations (optional)	number	Number of block confirmations to wait for (default: 1).
gasLimit (optional)	bigint	Transaction gas limit.

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

<Button
  onPress={async () => {
    try {
      await writeYourContractAsync({
        args: ["The value to set"],
        value: parseEther("0.1"),
      });
    } catch (e) {
      console.error("Error setting greeting:", e);
    }
  }}
>
  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 write function (writeYourContractAsync instance) sends the transaction to the smart contract.

Below is the configuration for write function:

Configuration

Parameter	Type	Description
args (optional)	unknown[]	Array of arguments to pass to the function (if accepts any). Types are inferred from contract's function parameters.
value (optional)	bigint	Amount of ETH to send with the transaction (for payable functions only).

Return Values

• The loading state is stored in the isLoading property.
• write function sends the transaction to the smart contract.