<VersionWarning version="0.1" />

# writeContract

Uses a smart account to executes a write function on a contract.

A "write" function on a Solidity contract modifies the state of the blockchain.

## Usage

:::code-group
```ts [example.ts]
import { smartAccountClient } from "./smartAccountClient"
import { simpleAbi } from './abi'

const hash = await smartAccountClient.writeContract({
    address: '0xFBA3912Ca04dd458c843e2EE08967fC04f3579c2',
    abi: simpleAbi,
    functionName: 'mint',
})
```

```ts [smartAccountClient.ts]
import { ENTRYPOINT_ADDRESS_V07, createSmartAccountClient } from "permissionless"
import { privateKeyToSimpleSmartAccount } from "permissionless/accounts"
import { createPimlicoPaymasterClient } from "permissionless/clients/pimlico"
import { createPublicClient, http } from "viem"
import { sepolia } from "viem/chains"

export const publicClient = createPublicClient({
	transport: http("https://sepolia.rpc.thirdweb.com"),
})

// if using a paymaster
const paymasterClient = createPimlicoPaymasterClient({
	transport: http("https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY"),
	entryPoint: ENTRYPOINT_ADDRESS_V07,
})

export const simpleSmartAccount = await privateKeyToSimpleSmartAccount(publicClient, {
	privateKey: "0xPRIVATE_KEY",
	factoryAddress: "0x91E60e0613810449d098b0b5Ec8b51A0FE8c8985", // simple version
	entryPoint: ENTRYPOINT_ADDRESS_V07,
})

export const smartAccountClient = createSmartAccountClient({
	account: simpleSmartAccount,
	entryPoint: ENTRYPOINT_ADDRESS_V07,
	chain: sepolia, // or whatever chain you are using
	bundlerTransport: http("https://api.pimlico.io/v2/sepolia/rpc?apikey=YOUR_PIMLICO_API_KEY"),
	middleware: {
		sponsorUserOperation: paymasterClient.sponsorUserOperation, // if using a paymaster
	},
})
```

```ts [abi.ts]
export const simpleAbi = [
  ...
  {
    inputs: [],
    name: "mint",
    outputs: [],
    stateMutability: "nonpayable",
    type: "function",
  },
  ...
] as const;
```
:::

## Return Value

* **Type:** `Hash`

The transaction hash of the associated write operation

## Parameters

### address

* **Type:** `Address`

The contract address.

### abi

* **Type:** `Abi`

The contract's ABI.

### functionName

* **Type:** `string`

A function to extract from the ABI.

### args (optional)

* **Type:** Inferred from ABI.

Arguments to pass to function call.

### gas (optional)

* **Type:** `bigint`

The gas limit for the transaction. Note that passing a gas limit also skips the gas estimation step.

### nonce (optional)

* **Type:** `number`

Unique number identifying this transaction.

### value (optional)

* **Type:** `number`

Value in wei sent with this transaction.

### gasPrice (optional)

* **Type:** `bigint`

The price (in wei) to pay per gas. Only applies to Legacy Transactions

### maxFeePerGas (optional)

* **Type:** `bigint`

Total fee per gas (in wei), inclusive of `maxPriorityFeePerGas`. Only applies to EIP-1559 Transactions

### maxPriorityFeePerGas (optional)

* **Type:** `bigint`

Max priority fee per gas (in wei). Only applies to EIP-1559 Transactions

### dataSuffix (optional)

* **Type:** `Hex`

Data to append to the end of the calldata.

### account (optional)

* **Type:** `SmartAccount`

The Account to write to the contract from.