square

Documentation

Index

• func BlobShareRange(txs [][]byte, txIndex, blobIndex int, appVersion uint64) (shares.Range, error)
• func Deconstruct(s Square, decoder types.TxDecoder) (core.Txs, error)
• func Size(len int) int
• func TxShareRange(txs [][]byte, txIndex int, appVersion uint64) (shares.Range, error)
• type Builder
  • func NewBuilder(maxSquareSize int, appVersion uint64, txs ...[]byte) (*Builder, error)
  • func (b *Builder) AppendBlobTx(blobTx coretypes.BlobTx) bool
  • func (b *Builder) AppendTx(tx []byte) bool
  • func (b *Builder) BlobShareLength(pfbIndex, blobIndex int) (int, error)
  • func (b *Builder) Export() (Square, error)
  • func (b *Builder) FindBlobStartingIndex(pfbIndex, blobIndex int) (int, error)
  • func (b *Builder) FindTxShareRange(txIndex int) (shares.Range, error)
  • func (b *Builder) GetWrappedPFB(txIndex int) (*coretypes.IndexWrapper, error)
  • func (b *Builder) NumPFBs() int
  • func (b *Builder) NumTxs() int
• type Square
  • func Build(txs [][]byte, appVersion uint64, maxSquareSize int) (Square, [][]byte, error)
  • func Construct(txs [][]byte, appVersion uint64, maxSquareSize int) (Square, error)
  • func EmptySquare() Square
  • func (s Square) Equals(other Square) bool
  • func (s Square) IsEmpty() bool
  • func (s Square) Size() int
  • func (s Square) WrappedPFBs() (core.Txs, error)

Functions

func BlobShareRange

func BlobShareRange(txs [][]byte, txIndex, blobIndex int, appVersion uint64) (shares.Range, error)

BlobShareRange returns the range of share indexes that the blob, identified by txIndex and blobIndex, occupies. The range is end exclusive.

func Deconstruct

func Deconstruct(s Square, decoder types.TxDecoder) (core.Txs, error)

Deconstruct takes a square and returns the ordered list of block transactions that constructed that square

This method uses the wrapped pfbs in the PFB namespace to identify and decode the blobs. Data that may be included in the square but isn't recognised by the square construction algorithm will be ignored

func Size

func Size(len int) int

func TxShareRange

func TxShareRange(txs [][]byte, txIndex int, appVersion uint64) (shares.Range, error)

TxShareRange returns the range of share indexes that the tx, specified by txIndex, occupies. The range is end exclusive.

Types

type Builder

type Builder struct {
	// contains filtered or unexported fields
}

func NewBuilder

func NewBuilder(maxSquareSize int, appVersion uint64, txs ...[]byte) (*Builder, error)

func (*Builder) AppendBlobTx

func (b *Builder) AppendBlobTx(blobTx coretypes.BlobTx) bool

AppendBlobTx attempts to allocate the blob transaction to the square. It returns false if there is not enough space in the square to fit the transaction.

func (*Builder) AppendTx

func (b *Builder) AppendTx(tx []byte) bool

AppendTx attempts to allocate the transaction to the square. It returns false if there is not enough space in the square to fit the transaction.

func (*Builder) BlobShareLength

func (b *Builder) BlobShareLength(pfbIndex, blobIndex int) (int, error)

BlobShareLength returns the amount of shares a blob takes up in the square. It takes the index of the pfb in the tx set and the index of the blob within the PFB. TODO: we could look in to creating a map to avoid O(n) lookup when we expect large numbers of blobs

func (*Builder) Export

func (b *Builder) Export() (Square, error)

Export constructs the square.

func (*Builder) FindBlobStartingIndex

func (b *Builder) FindBlobStartingIndex(pfbIndex, blobIndex int) (int, error)

FindBlobStartingIndex returns the starting share index of the blob in the square. It takes the index of the pfb in the tx set and the index of the blob within the PFB.

func (*Builder) FindTxShareRange

func (b *Builder) FindTxShareRange(txIndex int) (shares.Range, error)

FindTxShareRange returns the range of shares occupied by the tx at txIndex. The indexes are both inclusive.

func (*Builder) GetWrappedPFB

func (b *Builder) GetWrappedPFB(txIndex int) (*coretypes.IndexWrapper, error)

func (*Builder) NumPFBs

func (b *Builder) NumPFBs() int

func (*Builder) NumTxs

func (b *Builder) NumTxs() int

type Square

type Square []shares.Share

Square is a 2D square of shares with symmetrical sides that are always a power of 2.

func Build

func Build(txs [][]byte, appVersion uint64, maxSquareSize int) (Square, [][]byte, error)

Build takes an arbitrary long list of (prioritized) transactions and builds a square that is never greater than maxSquareSize. It also returns the ordered list of transactions that are present in the square and which have all PFBs trailing regular transactions. Note, this function does not check the underlying validity of the transactions. Errors should not occur and would reflect a violation in an invariant.

func Construct

func Construct(txs [][]byte, appVersion uint64, maxSquareSize int) (Square, error)

Construct takes the exact list of ordered transactions and constructs a square, validating that

• all blobTxs are ordered after non-blob transactions
• the transactions don't collectively exceed the maxSquareSize.

Note that this function does not check the underlying validity of the transactions.

func EmptySquare

func EmptySquare() Square

EmptySquare returns a 1x1 square with a single tail padding share

func (Square) Equals

func (s Square) Equals(other Square) bool

Equals returns true if two squares are equal

func (Square) IsEmpty

func (s Square) IsEmpty() bool

func (Square) Size

func (s Square) Size() int

Size returns the size of the sides of a square

func (Square) WrappedPFBs

func (s Square) WrappedPFBs() (core.Txs, error)

WrappedPFBs returns the wrapped PFBs in a square