> For the complete documentation index, see [llms.txt](https://docs.zkbob.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zkbob.com/implementation/client-library-sdk/account-less-mode-operations/helpers.md).
# Helpers
## Getting the Pool Identifier
Typically each pool has a unique `poolId`. The following method retrieves the currently selected pool ID:
```typescript
async poolId(): Promise
```
{% hint style="info" %}
**Exception:** Polygon BOB and Sepolia BOB pools share the same `poolID` which is 0.
{% endhint %}
### Returns
`Promise` returns `number`: pool identifier
### Example
```typescript
console.log(`Working on the pool with ID: ${await zkClient.poolId()}`);
// output: Working on the pool with ID: 0
```
## Get the Network (Chain) Name
```typescript
networkName(): string
```
### Returns
Name of the current chain (e.g. `polygon`, `sepolia` etc). The name is retrieved locally from the integrated hard-coded mapping. The default value for unknown chains is `unknown-chain`.
### Example
```typescript
console.log(`Working on ${zkClient.networkName()} chain`);
// output: Working on polygon chain
```
## Get Token Seller Contract
```typescript
async tokenSellerContract(): Promise
```
### Returns
`Promise` returns the `tokenSeller` contract address.
### Example
```typescript
console.log(`${await zkClient.tokenSellerContract()}`);
// output: 0x1b9d7af7793df23782b43af2566cc614745c32cf
```
---
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