bitswap

package
v0.20.1-arabica Latest Latest
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 Go to latest Published: Nov 7, 2024 License: Apache-2.0 Imports: 37 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Fetch 

func Fetch(
	ctx context.Context,
	exchg exchange.Interface,
	root *share.AxisRoots,
	blks []Block,
	opts ...FetchOption,
) error

Fetch fetches and populates given Blocks using Fetcher wrapping Bitswap.

Validates Block against the given AxisRoots and skips Blocks that are already populated. Gracefully synchronize identical Blocks requested simultaneously. Blocks until either context is canceled or all Blocks are fetched and populated.

func NewClient 

func NewClient(
	ctx context.Context,
	net network.BitSwapNetwork,
	bstore blockstore.Blockstore,
) *client.Client

NewClient constructs a Bitswap client with parameters optimized for Shwap protocol composition. Meant to be used by Full and Light nodes.

func NewNetwork 

func NewNetwork(host host.Host, prefix protocol.ID) network.BitSwapNetwork

NewNetwork constructs Bitswap network for Shwap protocol composition.

func NewServer 

func NewServer(
	ctx context.Context,
	net network.BitSwapNetwork,
	bstore blockstore.Blockstore,
) *server.Server

NewServer construct a Bitswap server with parameters optimized for Shwap protocol composition. Meant to be used by Full nodes.

Types

type AccessorGetter 

type AccessorGetter interface {
	// GetByHeight returns an Accessor by its height.
	GetByHeight(ctx context.Context, height uint64) (eds.AccessorStreamer, error)
	// HasByHeight reports whether an Accessor for the height exists.
	HasByHeight(ctx context.Context, height uint64) (bool, error)
}

AccessorGetter abstracts storage system that indexes and manages multiple eds.AccessorGetter by network height.

type Bitswap 

type Bitswap struct {
	*client.Client
	*server.Server
}

func New 

func New(
	ctx context.Context,
	net network.BitSwapNetwork,
	bstore blockstore.Blockstore,
) *Bitswap

func (*Bitswap) Close 

func (bs *Bitswap) Close() error

func (*Bitswap) NotifyNewBlocks 

func (bs *Bitswap) NotifyNewBlocks(ctx context.Context, blks ...blocks.Block) error

type Block 

type Block interface {
	// CID returns Shwap ID of the Block formatted as CID.
	CID() cid.Cid
	// Height reports the Height of the Shwap container behind the Block.
	Height() uint64

	// Populate fills up the Block with the Shwap container getting it out of the EDS
	// Accessor.
	Populate(context.Context, eds.Accessor) error
	// Marshal serializes bytes of the Shwap Container the Block holds.
	// MUST exclude the Shwap ID.
	Marshal() ([]byte, error)
	// UnmarshalFn returns closure that unmarshal the Block with the Shwap container.
	// Unmarshalling involves data validation against the given AxisRoots.
	UnmarshalFn(*share.AxisRoots) UnmarshalFn
}

Block represents Bitswap compatible generalization over Shwap containers. All Shwap containers must have a registered wrapper implementing the interface in order to be compatible with Bitswap. NOTE: This is not a Blockchain block, but an IPFS/Bitswap block.

func EmptyBlock 

func EmptyBlock(cid cid.Cid) (Block, error)

EmptyBlock constructs an empty Block with type in the given CID.

type Blockstore 

type Blockstore struct {
	Getter AccessorGetter
}

Blockstore implements generalized Bitswap compatible storage over Shwap containers that operates with Block and accesses data through AccessorGetter.

func (*Blockstore) AllKeysChan 

func (b *Blockstore) AllKeysChan(context.Context) (<-chan cid.Cid, error)

func (*Blockstore) DeleteBlock 

func (b *Blockstore) DeleteBlock(context.Context, cid.Cid) error

func (*Blockstore) Get 

func (b *Blockstore) Get(ctx context.Context, cid cid.Cid) (blocks.Block, error)

func (*Blockstore) GetSize 

func (b *Blockstore) GetSize(ctx context.Context, cid cid.Cid) (int, error)

func (*Blockstore) Has 

func (b *Blockstore) Has(ctx context.Context, cid cid.Cid) (bool, error)

func (*Blockstore) HashOnRead 

func (b *Blockstore) HashOnRead(bool)

func (*Blockstore) Put 

func (b *Blockstore) Put(context.Context, blocks.Block) error

func (*Blockstore) PutMany 

func (b *Blockstore) PutMany(context.Context, []blocks.Block) error

type FetchOption 

type FetchOption func(*fetchOptions)

func WithFetcher 

func WithFetcher(session exchange.Fetcher) FetchOption

WithFetcher instructs Fetch to use the given Fetcher. Useful for reusable Fetcher sessions.

func WithStore 

func WithStore(store blockstore.Blockstore) FetchOption

WithStore instructs Fetch to store all the fetched Blocks into the given Blockstore.

type Getter 

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

Getter implements share.Getter.

func NewGetter 

func NewGetter(
	exchange exchange.SessionExchange,
	bstore blockstore.Blockstore,
	availWndw pruner.AvailabilityWindow,
) *Getter

NewGetter constructs a new Getter.

func (*Getter) GetEDS 

func (g *Getter) GetEDS(
	ctx context.Context,
	hdr *header.ExtendedHeader,
) (*rsmt2d.ExtendedDataSquare, error)

GetEDS uses RowBlock and Fetch to get half of the first EDS quadrant(ODS) and recomputes the whole EDS from it. We fetch the ODS or Q1 to ensure better compatibility with archival nodes that only store ODS and do not recompute other quadrants.

func (*Getter) GetNamespaceData 

func (g *Getter) GetNamespaceData(
	ctx context.Context,
	hdr *header.ExtendedHeader,
	ns libshare.Namespace,
) (shwap.NamespaceData, error)

GetNamespaceData uses RowNamespaceDataBlock and Fetch to get all the data by the given namespace. If data spans over multiple rows, the request is split into parallel RowNamespaceDataID requests per each row and then assembled back into NamespaceData.

func (*Getter) GetShare 

func (g *Getter) GetShare(
	ctx context.Context,
	hdr *header.ExtendedHeader,
	row, col int,
) (libshare.Share, error)

GetShare uses [GetShare] to fetch and verify single share by the given coordinates.

func (*Getter) GetShares 

func (g *Getter) GetShares(
	ctx context.Context,
	hdr *header.ExtendedHeader,
	rowIdxs, colIdxs []int,
) ([]libshare.Share, error)

GetShares uses SampleBlock and Fetch to get and verify samples for given coordinates. TODO(@Wondertan): Rework API to get coordinates as a single param to make it ergonomic.

func (*Getter) Start 

func (g *Getter) Start()

Start kicks off internal fetching sessions.

We keep Bitswap sessions for the whole Getter lifespan:

  • Sessions retain useful heuristics about peers, like TTFB
  • Sessions prefer peers that previously served us related content.

So reusing session is expected to improve fetching performance.

There are two sessions for archival and available data, so archival node peers aren't mixed with regular full node peers.

func (*Getter) Stop 

func (g *Getter) Stop()

Stop shuts down Getter's internal fetching session.

type RowBlock 

type RowBlock struct {
	ID shwap.RowID

	Container shwap.Row
}

RowBlock is a Bitswap compatible block for Shwap's Row container.

func EmptyRowBlockFromCID 

func EmptyRowBlockFromCID(cid cid.Cid) (*RowBlock, error)

EmptyRowBlockFromCID constructs an empty RowBlock out of the CID.

func NewEmptyRowBlock 

func NewEmptyRowBlock(height uint64, rowIdx, edsSize int) (*RowBlock, error)

NewEmptyRowBlock constructs a new empty RowBlock.

func (*RowBlock) CID 

func (rb *RowBlock) CID() cid.Cid

func (*RowBlock) Height 

func (rb *RowBlock) Height() uint64

func (*RowBlock) Marshal 

func (rb *RowBlock) Marshal() ([]byte, error)

func (*RowBlock) Populate 

func (rb *RowBlock) Populate(ctx context.Context, eds eds.Accessor) error

func (*RowBlock) UnmarshalFn 

func (rb *RowBlock) UnmarshalFn(root *share.AxisRoots) UnmarshalFn

type RowNamespaceDataBlock 

type RowNamespaceDataBlock struct {
	ID shwap.RowNamespaceDataID

	Container shwap.RowNamespaceData
}

RowNamespaceDataBlock is a Bitswap compatible block for Shwap's RowNamespaceData container.

func EmptyRowNamespaceDataBlockFromCID 

func EmptyRowNamespaceDataBlockFromCID(cid cid.Cid) (*RowNamespaceDataBlock, error)

EmptyRowNamespaceDataBlockFromCID constructs an empty RowNamespaceDataBlock out of the CID.

func NewEmptyRowNamespaceDataBlock 

func NewEmptyRowNamespaceDataBlock(
	height uint64,
	rowIdx int,
	namespace libshare.Namespace,
	edsSize int,
) (*RowNamespaceDataBlock, error)

NewEmptyRowNamespaceDataBlock constructs a new empty RowNamespaceDataBlock.

func (*RowNamespaceDataBlock) CID 

func (rndb *RowNamespaceDataBlock) CID() cid.Cid

func (*RowNamespaceDataBlock) Height 

func (rndb *RowNamespaceDataBlock) Height() uint64

func (*RowNamespaceDataBlock) Marshal 

func (rndb *RowNamespaceDataBlock) Marshal() ([]byte, error)

func (*RowNamespaceDataBlock) Populate 

func (rndb *RowNamespaceDataBlock) Populate(ctx context.Context, eds eds.Accessor) error

func (*RowNamespaceDataBlock) UnmarshalFn 

func (rndb *RowNamespaceDataBlock) UnmarshalFn(root *share.AxisRoots) UnmarshalFn

type SampleBlock 

type SampleBlock struct {
	ID        shwap.SampleID
	Container shwap.Sample
}

SampleBlock is a Bitswap compatible block for Shwap's Sample container.

func EmptySampleBlockFromCID 

func EmptySampleBlockFromCID(cid cid.Cid) (*SampleBlock, error)

EmptySampleBlockFromCID constructs an empty SampleBlock out of the CID.

func NewEmptySampleBlock 

func NewEmptySampleBlock(height uint64, rowIdx, colIdx, edsSize int) (*SampleBlock, error)

NewEmptySampleBlock constructs a new empty SampleBlock.

func (*SampleBlock) CID 

func (sb *SampleBlock) CID() cid.Cid

func (*SampleBlock) Height 

func (sb *SampleBlock) Height() uint64

func (*SampleBlock) Marshal 

func (sb *SampleBlock) Marshal() ([]byte, error)

func (*SampleBlock) Populate 

func (sb *SampleBlock) Populate(ctx context.Context, eds eds.Accessor) error

func (*SampleBlock) UnmarshalFn 

func (sb *SampleBlock) UnmarshalFn(root *share.AxisRoots) UnmarshalFn

type UnmarshalFn 

type UnmarshalFn func(container, id []byte) error

UnmarshalFn is a closure produced by a Block that unmarshalls and validates the given serialized bytes of a Shwap container with ID and populates the Block with it on success.

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