merklize

package
v1.3.1-nbo-0.0.2 Latest Latest
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 Go to latest Published: Aug 6, 2023 License: Apache-2.0, MIT Imports: 17 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrorFieldIsEmpty is returned when field path to resolve is empty
	ErrorFieldIsEmpty = errors.New("fieldPath is empty")
	// ErrorContextTypeIsEmpty is returned when context type tp resolve is empty
	ErrorContextTypeIsEmpty = errors.New("ctxType is empty")
	// ErrorUnsupportedType is returned when type is not supported
	ErrorUnsupportedType = errors.New("unsupported type")
)
View Source 
var ErrIncorrectType = errors.New("incorrect type")

Functions

func AddEntriesToMerkleTree 

func AddEntriesToMerkleTree(ctx context.Context, mt mtAppender,
	entries []RDFEntry) error

func HashValue 

func HashValue(datatype string, value any) (*big.Int, error)

HashValue hashes value according to datatype.

func HashValueWithHasher 

func HashValueWithHasher(h Hasher, datatype string, value any) (*big.Int, error)

HashValueWithHasher hashes value according to datatype with a provided Hasher.

func NewDocumentLoader 

func NewDocumentLoader(ipfsCli *shell.Shell, ipfsGW string) ld.DocumentLoader

NewDocumentLoader creates a new document loader with a cache for http. ipfs cache is not implemented yet.

func SetDocumentLoader 

func SetDocumentLoader(docLoader ld.DocumentLoader)

SetDocumentLoader changes default DocumentLoader

func SetHasher 

func SetHasher(h Hasher)

SetHasher changes default hasher

func TypeFromContext 

func TypeFromContext(ctxBytes []byte, path string) (string, error)

TypeFromContext returns type of field from context by path.

func TypeIDFromContext 

func TypeIDFromContext(ctxBytes []byte, typeName string) (string, error)

TypeIDFromContext returns @id attribute for type from JSON-LD context

Types

type Hasher 

type Hasher interface {
	Hash(inpBI []*big.Int) (*big.Int, error)
	HashBytes(msg []byte) (*big.Int, error)
	Prime() *big.Int
}

Hasher is an interface to hash data

type MerkleTree 

type MerkleTree interface {
	Add(context.Context, *big.Int, *big.Int) error
	GenerateProof(context.Context, *big.Int) (*merkletree.Proof, error)
	Root() *merkletree.Hash
}

MerkleTree is merkle tree structure

func MerkleTreeSQLAdapter 

func MerkleTreeSQLAdapter(mt *merkletree.MerkleTree) MerkleTree

MerkleTreeSQLAdapter is merkle tree sql adapter

type MerklizeOption 

type MerklizeOption func(m *Merklizer)

MerklizeOption is options for merklizer

func WithDocumentLoader 

func WithDocumentLoader(documentLoader ld.DocumentLoader) MerklizeOption

WithDocumentLoader sets DocumentLoader

func WithHasher 

func WithHasher(h Hasher) MerklizeOption

WithHasher sets Hasher option

func WithIPFSClient 

func WithIPFSClient(ipfsCli *shell.Shell) MerklizeOption

WithIPFSClient sets IPFS client option required to resolve ipfs:// contexts. It works only if documentLoader is not set using WithDocumentLoader option. Otherwise, it will be ignored.

func WithIPFSGateway 

func WithIPFSGateway(ipfsGW string) MerklizeOption

WithIPFSGateway sets IPFS gateway URL option required to resolve ipfs:// contexts.

If WithIPFSClient option is set, gateway would be ignored and ipfs requests would be sent directly to the client.

If WithDocumentLoader option is set, gateway would be ignored and documents would be loaded using the document loader.

func WithMerkleTree 

func WithMerkleTree(mt MerkleTree) MerklizeOption

WithMerkleTree sets MerkleTree option

func WithSafeMode 

func WithSafeMode(safeMode bool) MerklizeOption

WithSafeMode enables the Safe mode when extending a JSON-LD document. The default setting for this mode is "true". If the function encounters an unknown field with an incorrect IRI predicate, it will return an error. However, if the Safe mode is set to "false", the function will simply skip the incorrect field and continue the merklization process without it.

type Merklizer 

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

Merklizer is a struct to work with json-ld doc merklization

func MerklizeJSONLD 

func MerklizeJSONLD(ctx context.Context, in io.Reader,
	opts ...MerklizeOption) (*Merklizer, error)

MerklizeJSONLD takes a JSON-LD document, parses it and returns a Merklizer

func (*Merklizer) Hasher 

func (m *Merklizer) Hasher() Hasher

func (*Merklizer) JSONLDType 

func (m *Merklizer) JSONLDType(path Path) (string, error)

JSONLDType returns the JSON-LD type of the given path. If there is no literal by this path, it returns an error.

func (*Merklizer) MkValue 

func (m *Merklizer) MkValue(val any) (Value, error)

func (*Merklizer) Proof 

func (m *Merklizer) Proof(ctx context.Context,
	path Path) (*merkletree.Proof, Value, error)

Proof generate and return Proof and Value by the given Path. If the path is not found, it returns nil as value interface.

func (*Merklizer) RawValue 

func (m *Merklizer) RawValue(path Path) (any, error)

func (*Merklizer) ResolveDocPath 

func (m *Merklizer) ResolveDocPath(path string) (Path, error)

func (*Merklizer) Root 

func (m *Merklizer) Root() *merkletree.Hash

type Options 

type Options struct {
	Hasher         Hasher
	DocumentLoader ld.DocumentLoader
}

Options type allows to change hashing algorithm and create Path and RDFEntry instances with hasher different from default one.

func (Options) NewPath 

func (o Options) NewPath(parts ...interface{}) (Path, error)

func (Options) NewPathFromDocument 

func (o Options) NewPathFromDocument(docBytes []byte,
	path string) (Path, error)

func (Options) NewRDFEntry 

func (o Options) NewRDFEntry(key Path, value interface{}) (RDFEntry, error)

func (Options) PathFromContext 

func (o Options) PathFromContext(ctxBytes []byte, path string) (Path, error)

func (Options) TypeFromContext 

func (o Options) TypeFromContext(ctxBytes []byte, path string) (string, error)

TypeFromContext returns type of field from context by path.

func (Options) TypeIDFromContext 

func (o Options) TypeIDFromContext(ctxBytes []byte,
	typeName string) (string, error)

TypeIDFromContext returns @id attribute for type from JSON-LD context

type Path 

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

func NewFieldPathFromContext 

func NewFieldPathFromContext(ctxBytes []byte, ctxType, fieldPath string) (Path, error)

NewFieldPathFromContext resolves field path without type path prefix

func NewPath 

func NewPath(parts ...interface{}) (Path, error)

func NewPathFromContext 

func NewPathFromContext(ctxBytes []byte, path string) (Path, error)

NewPathFromContext parses context and do its best to generate full Path from shortcut line field1.field2.field3...

func NewPathFromDocument 

func NewPathFromDocument(docBytes []byte, path string) (Path, error)

func (*Path) Append 

func (p *Path) Append(parts ...interface{}) error

func (*Path) MtEntry 

func (p *Path) MtEntry() (*big.Int, error)

func (*Path) Parts 

func (p *Path) Parts() []interface{}

func (*Path) Prepend 

func (p *Path) Prepend(parts ...interface{}) error

Prepend path's parts from the beginning

type PoseidonHasher 

type PoseidonHasher struct{}

PoseidonHasher is an applier of poseidon hash algorithm

func (PoseidonHasher) Hash 

func (p PoseidonHasher) Hash(inpBI []*big.Int) (*big.Int, error)

Hash returns poseidon hash on big int params

func (PoseidonHasher) HashBytes 

func (p PoseidonHasher) HashBytes(msg []byte) (*big.Int, error)

HashBytes returns poseidon hash on bytes

func (PoseidonHasher) Prime 

func (p PoseidonHasher) Prime() *big.Int

Prime returns Q constant

type RDFEntry 

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

func EntriesFromRDF 

func EntriesFromRDF(ds *ld.RDFDataset) ([]RDFEntry, error)

EntriesFromRDF creates entries from RDF dataset suitable to add to merkle tree

func EntriesFromRDFWithHasher 

func EntriesFromRDFWithHasher(ds *ld.RDFDataset,
	hasher Hasher) ([]RDFEntry, error)

EntriesFromRDFWithHasher creates entries from RDF dataset suitable to add to with a provided Hasher merkle tree

func NewRDFEntry 

func NewRDFEntry(key Path, value any) (RDFEntry, error)

func (RDFEntry) KeyMtEntry 

func (e RDFEntry) KeyMtEntry() (*big.Int, error)

func (RDFEntry) KeyValueMtEntries 

func (e RDFEntry) KeyValueMtEntries() (
	keyMtEntry *big.Int, valueMtEntry *big.Int, err error)

func (RDFEntry) ValueMtEntry 

func (e RDFEntry) ValueMtEntry() (*big.Int, error)

type Value 

type Value interface {
	MtEntry() (*big.Int, error)

	IsTime() bool
	AsTime() (time.Time, error)

	IsString() bool
	AsString() (string, error)

	IsInt64() bool
	AsInt64() (int64, error)

	IsBool() bool
	AsBool() (bool, error)
}

func NewValue 

func NewValue(hasher Hasher, val any) (Value, error)

NewValue creates new Value

Source Files

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