# Tx Builder

> You won't need to use this class directly. In `0xWeb` generated classes `TxDataBuilder` and `TxWriter` are used under the hood to send transactions.

Prepares the [Tx Data](https://github.com/0xweb-org/dequanto/blob/master/src/txs/TxDataBuilder.ts)🔗 to be submitted to the chain. 

```typescript
import { TxDataBuilder } from '@dequanto/txs/TxDataBulder'

let builder = new TxDataBuilder(client, account?)
let txData = builder
    // demo with types
    .setInputDataWithTypes(types: any[], paramaters: any[])
    .setInputDataWithABI(fnAbi: string | AbiItem, ...params)
    .setValue(wei: bigint)
    .setNonce(nonceConfig?: TNonceConfig)
    .setGas(gasConfig?: TGasConfig)
    .signToString(privateKey: string);

    
type TNonceConfig {
    // sets the nonce of the first tx in pending state
    overriding?: boolean
    // set the nonce of the N-th tx in pending state
    noncePending?: number
    // custom nonce value
    nonce?: number
}
type TGasConfig {
    price?: bigint
    priceRatio?: number
    gasLimitRatio?: number
    gasLimit?: string | number
    gasEstimation?: boolean
    from?: TAddress
    type?: 1 | 2
}
```


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