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# Receipt Helpers

Utility functions to extract deployed contract addresses from transaction receipts after a spawn action.

## Import

```ts
import { 
  extractConduitAddress, 
  extractAccessControlAddress, 
  extractMultiVehicleContracts, 
  extractAaveV3VehicleAddress 
} from '@railnetorg/railnet-sdk'
```

## Usage

The typical flow involves spawning a contract, waiting for the transaction receipt, and then using a helper to extract the deployed address(es).

```ts
import { createPublicClient, createWalletClient, http } from 'viem'
import { base } from 'viem/chains'
import { 
  spawnConduit, 
  extractConduitAddress,
} from '@railnetorg/railnet-sdk'

const publicClient = createPublicClient({
  chain: base,
  transport: http(),
})

const walletClient = createWalletClient({
  chain: base,
  transport: http(),
})

const factoryAddress = '0x1234...'

// 1. Spawn the contract
const hash = await spawnConduit(walletClient, {
  factory: factoryAddress,
  name: 'My Conduit',
  symbol: 'COND',
  vehicle: '0x5678...',
  initialExpectedSupply: 1000000000000000000n,
  transferEnabled: true,
  accessControl: '0x...',
  feeManager: '0x...',
  accountList: '0x...',
  ownerRegistry: '0x...',
  account: '0xd2135CfB216b74109775236E36d4b433F1DF507B',
})

// 2. Wait for the receipt
const receipt = await publicClient.waitForTransactionReceipt({ hash })

// 3. Extract the deployed address
const conduitAddress = extractConduitAddress(receipt, factoryAddress)
```

## extractConduitAddress

Extracts the deployed conduit address from a `spawnConduit` transaction receipt.

```ts
const conduitAddress = extractConduitAddress(receipt, factoryAddress)
```

### Parameters

#### receipt

* **Type:** `TransactionReceipt`

The transaction receipt.

#### factoryAddress

* **Type:** `Address`

The address of the conduit factory.

### Returns

`Address | null`

The deployed conduit address, or `null` if not found.

## extractAccessControlAddress

Extracts the deployed access control address from a `spawnAccessControl` transaction receipt.

```ts
const accessControlAddress = extractAccessControlAddress(receipt, factoryAddress)
```

### Parameters

#### receipt

* **Type:** `TransactionReceipt`

The transaction receipt.

#### factoryAddress

* **Type:** `Address`

The address of the access control factory.

### Returns

`Address | null`

The deployed access control address, or `null` if not found.

## extractMultiVehicleContracts

Extracts the deployed MultiVehicle contract addresses from a `spawnMultiVehicle` transaction receipt.

```ts
const contracts = extractMultiVehicleContracts(receipt, factoryAddress)
```

### Parameters

#### receipt

* **Type:** `TransactionReceipt`

The transaction receipt.

#### factoryAddress

* **Type:** `Address`

The address of the MultiVehicle factory.

### Returns

`MultiVehicleContracts | null`

The deployed MultiVehicle contract addresses, or `null` if not found.

#### MultiVehicleContracts

```ts
type MultiVehicleContracts = {
  multiVehicle: Address
  queryRedeemQueue: Address
  queueStrategyEngine: Address
  sectorAccountingEngine: Address
  subQueryEngine: Address
  vehicleManager: Address
}
```

## extractAaveV3VehicleAddress

Extracts the deployed Aave V3 vehicle address from a `spawnAaveV3Vehicle` transaction receipt.

```ts
const vehicleAddress = extractAaveV3VehicleAddress(receipt, factoryAddress)
```

### Parameters

#### receipt

* **Type:** `TransactionReceipt`

The transaction receipt.

#### factoryAddress

* **Type:** `Address`

The address of the Aave V3 vehicle factory.

### Returns

`Address | null`

The deployed Aave V3 vehicle address, or `null` if not found.