# Deposit and Join
This section outlines the process to deposit tokens into a Bancor liquidity pool and join the rewards program in a single transaction.
This process reduces gas costs and ensures your tokens are earning the maximum available yield.
### 1. Approve
In order for the contract to interact with the tokens in your wallet and perform the transaction, an *`Approval`* must be set first for the contract.
{% hint style="info" %}
If you wish to deposit ETH or have already set approval for a very large amount for the token, skip to [step 3](#3.-function-depositandjoin).
{% endhint %}
* Visit the relevant token contract. \
This can be found on Etherscan by searching for the token ticker, or by clicking the Etherscan link on Coingecko token pages. \
For example: [BNT](https://etherscan.io/token/0x1f573d6fb3f13d689ff844b4ce37794d79a7ff1c#writeContract) | [DAI](https://etherscan.io/token/0x6b175474e89094c44da98b954eedeac495271d0f#writeContract) | [LINK](https://etherscan.io/token/0x514910771af9ca656af840dff83e8264ecf986ca#writeContract)
* Connect your wallet as explained in "[Using Etherscan](https://docs.bancor.network/guides/bancor-etherscan-guide/broken-reference)"
* Execute the `Approve` function (this is a Write function)
| |
|---|
| _spender | The address of the StandardRewards found here |
| _value | The amount you would like to approve (it can be identical or larger than the amount you wish to deposit, BUT NOT LESS) in WEI format as explained here |
* Click `Write` to sign the *`Approve`* in your wallet
### 2. Function latestProgramId()
In order to join the latest rewards program, you first need to identify the token's **program ID**.
* Visit the *`StandardRewards`* contract [on etherscan](https://etherscan.io/address/0xb0B958398ABB0b5DB4ce4d7598Fb868f5A00f372#readProxyContract)
* Execute the `latestProgramId` function (this is a Read function)
`Input variable`
| Name | Type | Description |
| ---- | ----- | -------------------------------------------- |
| pool | Token | The address of the token you wish to deposit |
{% hint style="info" %}
For ETH use *0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE*
{% endhint %}
`Output response`
| Name | Type | Description |
| ---- | ------- | -------------------------------------------------------------------------- |
| id | uint256 | The unique identifier for the latest program available for the input token |
{% hint style="info" %}
You will require the id value for the depositAndJoin function.
{% endhint %}
### 3. Function depositAndJoin()
{% hint style="danger" %}
Some pools might be in deficit which might effect the ability to withdraw the full amount you have deposited ([more info](https://blog.bancor.network/market-conditions-update-june-19-2022-e5b857b39336)).
{% endhint %}
Now that you know the program ID and have the approval in place, you are ready to deposit your tokens into the Bancor pool and rewards contracts.
Execute the **depositAndJoin** function, with the id you received from the first step, and the number of tokens you wish to deposit.
* Visit the *`StandardRewards`* contract [on etherscan](https://etherscan.io/address/0xb0B958398ABB0b5DB4ce4d7598Fb868f5A00f372#writeProxyContract)
* Execute the *`depositAndJoin`* function (this is a Write function)
| Name | Type | Description |
| -------------- | ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| depositAndJoin | uint256 | Note:
IF ETH, indicate the ETH amount in full units (10.5 ETH should be indicated as 10.5)
For any other token, this should be set to 0
|
| id | uint256 | The unique identifier for the latest program available for the input token
(extracted in step 2)
|
| tokenAmount | uint256 | The token (i.e BNT, ETH, DAI, LINK) amount you would like to deposit (using `WEI` format [explained here](https://docs.bancor.network/guides/bancor-etherscan-guide/broken-reference)) |
Once executed successfully, the following will happen:
1. Your tokens will be deposited into the Bancor pool
2. The protocol will generate bnTokens that represent your position in the pool, and automatically stake them into the rewards contract
---
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