Class: MemBlock

primitives~MemBlock()

Mem Block A block object which is essentially a "placeholder" for a full Block object. The v8 garbage collector's head will explode if there is too much data on the javascript heap. Blocks can currently be up to 1mb in size. In the future, they may be 2mb, 8mb, or maybe 20mb, who knows? A MemBlock is an optimization which defers parsing of the serialized transactions (the block Buffer) until the block has passed through the chain queue and is about to enter the chain. This keeps a lot data off of the javascript heap for most of the time a block even exists in memory, and manages to keep a lot of strain off of the garbage collector. Having 500mb of blocks on the js heap would not be a good thing.

Constructor

new MemBlock()

Create a mem block.

Extends:
  • AbstractBlock
Source:

Extends

  • AbstractBlock

Methods

(static) isMemBlock(obj) → {Boolean}

Test whether an object is a MemBlock.

Parameters:
Name Type Description
obj Object
Source:
Returns:
Type
Boolean

(private) decode(data)

Inject properties from serialized data.

Parameters:
Name Type Description
data Buffer
Source:

encode() → {Buffer}

Return serialized block data.

Source:
Returns:
Type
Buffer

getCoinbaseHeight() → {Number}

Retrieve the coinbase height from the coinbase input script.

Source:
Returns:

height (-1 if not present).

Type
Number

getSize() → {Number}

Get the full block size.

Source:
Returns:
Type
Number

isMemory() → {Boolean}

Test whether the block is a memblock.

Source:
Returns:
Type
Boolean

padding(size) → {Buffer}

Retrieve deterministically random padding.

Parameters:
Name Type Description
size Number
Source:
Returns:
Type
Buffer

(private) parseCoinbaseHeight() → {Number}

Parse the coinbase height from the coinbase input script.

Source:
Returns:

height (-1 if not present).

Type
Number

powHash() → {Buffer}

Calculate PoW hash.

Source:
Returns:
Type
Buffer

(private) read(br)

Inject properties from buffer reader.

Parameters:
Name Type Description
br BufferReader
Source:

toBlock() → {Block}

Parse the serialized block data and create an actual Block.

Source:
Throws:

Parse error

Returns:
Type
Block

toHead() → {Buffer}

Serialize the block headers.

Source:
Returns:
Type
Buffer

toHeaders() → {Headers}

Convert the block to a headers object.

Source:
Returns:
Type
Headers

toPrehead() → {Buffer}

Serialize the block headers.

Source:
Returns:
Type
Buffer

verifyBody() → {Boolean}

Verify the block.

Source:
Returns:
Type
Boolean

write() → {Buffer}

Return serialized block data.

Source:
Returns:
Type
Buffer