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title: danog\MadelineProto\Stream\Common\HashedBufferedStream: Hash stream wrapper.
description: 

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# `danog\MadelineProto\Stream\Common\HashedBufferedStream`
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> Author: Daniil Gentili <daniil@daniil.it>  
  

Hash stream wrapper.  




## Method list:
* `startReadHash(): void`
* `checkReadHash(int $after): void`
* `getReadHash(): string`
* `hasReadHash(): bool`
* `startWriteHash(): void`
* `checkWriteHash(int $after): void`
* `getWriteHash(): string`
* `hasWriteHash(): bool`
* `bufferReadGenerator(int $length): \Generator That resolves with a string when the provided promise is resolved and the data is added to the hashing context`
* `setExtra(string $hash): void`
* `connect(\danog\MadelineProto\Stream\ConnectionContext $ctx): \Generator`
* `disconnect(): \Amp\Promise`
* `getReadBufferGenerator(int $length): \Generator`
* `getWriteBufferGenerator(int $length): \Generator`
* `bufferRead(): \Promise Resolves with a string when new data is available or `null` if the stream has closed.`
* `bufferWrite(string $data): \Promise Succeeds once the data has been successfully written to the stream.`
* `getSocket(): \Amp\Socket\Socket`
* `getStream(): \danog\MadelineProto\Stream\RawStreamInterface`
* `getReadBuffer(int $length): \Amp\Promise`
* `getWriteBuffer(int $length, string $append): \Amp\Promise`

## Methods:
### `startReadHash(): void`

Enable read hashing.



### `checkReadHash(int $after): void`

Check the read hash after N bytes are read.


Parameters:
* `$after`: `int` The number of bytes to read before checking the hash  



### `getReadHash(): string`

Stop read hashing and get final hash.



### `hasReadHash(): bool`

Check if we are read hashing.



### `startWriteHash(): void`

Enable write hashing.



### `checkWriteHash(int $after): void`

Write the write hash after N bytes are read.


Parameters:
* `$after`: `int` The number of bytes to read before writing the hash  



### `getWriteHash(): string`

Stop write hashing and get final hash.



### `hasWriteHash(): bool`

Check if we are write hashing.



### `bufferReadGenerator(int $length): \Generator That resolves with a string when the provided promise is resolved and the data is added to the hashing context`

Hashes read data asynchronously.


Parameters:
* `$length`: `int` Read and hash $length bytes  


Return value: That resolves with a string when the provided promise is resolved and the data is added to the hashing context


### `setExtra(string $hash): void`

Set the hash algorithm.


Parameters:
* `$hash`: `string` Algorithm name  



### `connect(\danog\MadelineProto\Stream\ConnectionContext $ctx): \Generator`

Connect to stream.


Parameters:
* `$ctx`: `\danog\MadelineProto\Stream\ConnectionContext` The connection context  


#### See also: 
* [`\danog\MadelineProto\Stream\ConnectionContext`: Connection context class.](../ConnectionContext.md)
* `\Generator`




### `disconnect(): \Amp\Promise`

Async close.


#### See also: 
* `\Amp\Promise`




### `getReadBufferGenerator(int $length): \Generator`

Get read buffer asynchronously.


Parameters:
* `$length`: `int` Length of payload, as detected by this layer  


#### See also: 
* `\Generator`




### `getWriteBufferGenerator(int $length): \Generator`

Get write buffer asynchronously.


Parameters:
* `$length`: `int` Length of data that is going to be written to the write buffer  


#### See also: 
* `\Generator`




### `bufferRead(): \Promise Resolves with a string when new data is available or `null` if the stream has closed.`

Reads data from the stream.


Return value: Resolves with a string when new data is available or `null` if the stream has closed.


### `bufferWrite(string $data): \Promise Succeeds once the data has been successfully written to the stream.`

Writes data to the stream.


Parameters:
* `$data`: `string` Bytes to write.  


Return value: Succeeds once the data has been successfully written to the stream.


### `getSocket(): \Amp\Socket\Socket`

{@inheritdoc}


#### See also: 
* `\Amp\Socket\Socket`




### `getStream(): \danog\MadelineProto\Stream\RawStreamInterface`

{@inheritDoc}


#### See also: 
* [`\danog\MadelineProto\Stream\RawStreamInterface`: Raw stream interface.](../RawStreamInterface.md)




### `getReadBuffer(int $length): \Amp\Promise`

Get read buffer asynchronously.


Parameters:
* `$length`: `int` Length of payload, as detected by this layer  


#### See also: 
* `\Amp\Promise`




### `getWriteBuffer(int $length, string $append): \Amp\Promise`

Get write buffer asynchronously.


Parameters:
* `$length`: `int` Total length of data that is going to be piped in the buffer  
* `$append`: `string` Data to append after entire buffer is written  


#### See also: 
* `\Amp\Promise`




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