---
title: Blockchain storage
parent: API
layout: page
---

# Api/BlockchainStorageApi

[Blockchain storage API Reference](https://apidoc.tatum.io/tag/Blockchain-storage/)

```php
// Set your API Keys 👇 here
$sdk = new \Tatum\Sdk();

// MainNet API Call
$sdk->mainnet()->api()->blockchainStorage();

// TestNet API Call
$sdk->testnet()->api()->blockchainStorage();
```

## Methods

Method | Description
------------- | -------------
[**createRecord()**](#createrecord) | Store a log record
[**createRecordCelo()**](#createrecordcelo) | Store a log record
[**createRecordKMS()**](#createrecordkms) | Store a log record
[**getLog()**](#getlog) | Get a log record


## `createRecord()`

### Example

{: .new-title }
> #️⃣ Execute command in terminal 
> 
> [✨ php -f **createRecord.php**](https://github.com/tatumio/tatum-php/blob/master/examples/Api/BlockchainStorageApi/createRecord.php){: .btn .btn-green .mt-4}

### Request

> **POST** `/v3/record`

### Type signature

```php
(new \Tatum\Sdk())->{mainnet/testnet}()->api()->blockchainStorage()->createRecord(
    \Tatum\Model\CreateRecord $create_record
): \Tatum\Model\TransactionHash
```

### Parameters

Name | Type | Description  | Notes
------------- | ------------- | ------------- | -------------
 **$create_record** | [**\Tatum\Model\CreateRecord**](../../Model/CreateRecord) |  |

### Return type

[**\Tatum\Model\TransactionHash**](../../Model/TransactionHash)

### Description

> Store a log record

**2 credits per API call + additional credits based on the size of the stored data and the type of the blockchain**

Store data on the blockchain.

The total cost of a transaction on Ethereum (in credits) depends on the size of the data. The data is stored as a string in the hexadecimal format, and the maximum size of the data is approximately 130 kB on the mainnet and 30 kB on testnet. Every 5 characters cost 1 credit. Therefore, one API call with 1 kB of data (1024 characters) would cost 205 credits.

This API is supported for the following blockchains:

* BNB Smart Chain
* Celo
* Elrond
* Ethereum (only the mainnet or the Sepolia testnet)
* Harmony
* Klaytn
* Polygon
* XDC

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## `createRecordCelo()`

### Example

{: .new-title }
> #️⃣ Execute command in terminal 
> 
> [✨ php -f **createRecordCelo.php**](https://github.com/tatumio/tatum-php/blob/master/examples/Api/BlockchainStorageApi/createRecordCelo.php){: .btn .btn-green .mt-4}

### Request

> **POST** `/v3/record`

### Type signature

```php
(new \Tatum\Sdk())->{mainnet/testnet}()->api()->blockchainStorage()->createRecordCelo(
    \Tatum\Model\CreateRecordCelo $create_record_celo
): \Tatum\Model\TransactionHash
```

### Parameters

Name | Type | Description  | Notes
------------- | ------------- | ------------- | -------------
 **$create_record_celo** | [**\Tatum\Model\CreateRecordCelo**](../../Model/CreateRecordCelo) |  |

### Return type

[**\Tatum\Model\TransactionHash**](../../Model/TransactionHash)

### Description

> Store a log record



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## `createRecordKMS()`

### Example

{: .new-title }
> #️⃣ Execute command in terminal 
> 
> [✨ php -f **createRecordKMS.php**](https://github.com/tatumio/tatum-php/blob/master/examples/Api/BlockchainStorageApi/createRecordKMS.php){: .btn .btn-green .mt-4}

### Request

> **POST** `/v3/record`

### Type signature

```php
(new \Tatum\Sdk())->{mainnet/testnet}()->api()->blockchainStorage()->createRecordKMS(
    \Tatum\Model\CreateRecordKMS $create_record_kms
): \Tatum\Model\TransactionHash
```

### Parameters

Name | Type | Description  | Notes
------------- | ------------- | ------------- | -------------
 **$create_record_kms** | [**\Tatum\Model\CreateRecordKMS**](../../Model/CreateRecordKMS) |  |

### Return type

[**\Tatum\Model\TransactionHash**](../../Model/TransactionHash)

### Description

> Store a log record



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## `getLog()`

### Example

{: .new-title }
> #️⃣ Execute command in terminal 
> 
> [✨ php -f **getLog.php**](https://github.com/tatumio/tatum-php/blob/master/examples/Api/BlockchainStorageApi/getLog.php){: .btn .btn-green .mt-4}

### Request

> **GET** `/v3/record`

### Type signature

```php
(new \Tatum\Sdk())->{mainnet/testnet}()->api()->blockchainStorage()->getLog(
    string $chain,
    string $id
): \Tatum\Model\GetLog200Response
```

### Parameters

Name | Type | Description  | Notes
------------- | ------------- | ------------- | -------------
 **$chain** | **string**  | The blockchain to get the log record from |
 **$id** | **string**  | The ID of the log record or transaction to get from the blockchain |

### Return type

[**\Tatum\Model\GetLog200Response**](../../Model/GetLog200Response)

### Description

> Get a log record

**1 credit per API call**

Get a log data record from the Ethereum blockchain (only the mainnet or the Sepolia testnet).

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