# Priceoracle API

## poolSize

{% tabs %}
{% tab title="Smart Contract" %}

```python
@constant
def poolSize(contract_address: address) -> uint256
```

{% endtab %}

{% tab title="Web3" %}

```javascript
contract.methods.poolSize(stablecoinswap_address).call()
```

{% endtab %}
{% endtabs %}

| Parameter         | Type    |                          Description |
| ----------------- | ------- | -----------------------------------: |
| contract\_address | address | Address of a stablecoinswap contract |

| Returns |                                                                          |
| ------- | -----------------------------------------------------------------------: |
| uint256 | Total pool size of stablecoinswap contract in USD multiplied by 10\*\*18 |

## supportedTokens

{% tabs %}
{% tab title="Smart Contract" %}

```python
supportedTokens: public(address[5])
```

{% endtab %}

{% tab title="Web3" %}

```
contract.methods.supported_tokens(index).call()
```

{% endtab %}
{% endtabs %}

| Parameter | Type |                         Description |
| --------- | ---- | ----------------------------------: |
| index     | uint | Index of a supported token (0 to 4) |

| Returns |                        |
| ------- | ---------------------: |
| address | Address of ERC20 token |

## normalized\_token\_prices

{% tabs %}
{% tab title="Smart Contract" %}

```python
normalized_token_prices: public(map(address, uint256))
```

{% endtab %}

{% tab title="Web3" %}

```javascript
contract.methods.normalized_token_prices(token_address).call()
```

{% endtab %}
{% endtabs %}

| Parameter | Type    |                     Description |
| --------- | ------- | ------------------------------: |
| address   | address | Address of ERC20 token contract |

| Returns |                                                               |
| ------- | ------------------------------------------------------------: |
| uint256 | Returns normalized price in USD for a token at given address. |

Where:

`normalized_usd_price = usd_price * 10**8 * 10**(18 - token.decimals)`

Example: USD price for USDC = $1.0, token has 6 decimals:

`normalized_usd_price = 100000000000000000000`

USD price for DAI token is the price according to [https://etherscan.io/address/0x787f552bdc17332c98aa360748884513e3cb401a](https://etherscan.io/address/0x787f552bdc17332c98aa360748884513e3cb401a#readContract) and USD price for any other token is always $1.0


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