proof

Documentation

Index

• Constants
• Variables
• type ChpAnchor
• type ChpBranch
• type ChpOps
• type ChpPath
  • func NewChpPathFromMerkleProof(proof *merkle.Proof, derivedAt time.Time, anchorType pb.Anchor_Type, ...) (path *ChpPath, er error)
  • func (c *ChpPath) Marshal() ([]byte, error)
  • func (c *ChpPath) Unmarshal(data []byte) error
• type EthTrie
  • func NewEthTrie(acType ap.Anchor_Type, txnID, txnURI string, pfTrie [][]byte) *EthTrie
  • func (e *EthTrie) Marshal() ([]byte, error)
  • func (e *EthTrie) Root() []byte
  • func (e *EthTrie) Unmarshal(data []byte) error
• type Proof
  • func NewProof(format ap.Proof_Format) (Proof, error)

Constants

const (
	// ProvenDBPrefix is the ProvenDB prefix used in Chainpoint Path format
	ProvenDBPrefix = "pdb"
)

const (
	// SignaturePrefix is the prefix for the signature entry in a proof
	SignaturePrefix = "sig:"
)

Variables

var (
	// ErrSignatureMissing is the error when the signature is missing in a proof
	ErrSignatureMissing = errors.New("signature is missing")
)

Types

type ChpAnchor

type ChpAnchor struct {
	Type     string   `json:"type"`
	AnchorID string   `json:"anchor_id"`
	URIS     []string `json:"uris"`
}

ChpAnchor represents a Chainpoint anchor object

type ChpBranch

type ChpBranch struct {
	Label    string      `json:"label"`
	OPS      []ChpOps    `json:"ops"`
	Branches []ChpBranch `json:"branches,omitempty"`
}

ChpBranch represents a Chainpoint branch object

type ChpOps

type ChpOps struct {
	L       string      `json:"l,omitempty"`
	R       string      `json:"r,omitempty"`
	OP      string      `json:"op,omitempty"`
	Anchors []ChpAnchor `json:"anchors,omitempty"`
}

ChpOps represents a Chainpoint ops object

type ChpPath

type ChpPath struct {
	Context             string      `json:"@context"`
	Type                string      `json:"type"`
	Hash                string      `json:"hash"`
	HashIDNode          string      `json:"hash_id_node"`
	HashSubmittedNodeAt string      `json:"hash_submitted_node_at"`
	HashIDCore          string      `json:"hash_id_core"`
	HashSubmittedCoreAt string      `json:"hash_submitted_core_at"`
	Branches            []ChpBranch `json:"branches"`
}

ChpPath represents a proof in Chainpoint Path format

func NewChpPathFromMerkleProof

func NewChpPathFromMerkleProof(
	proof *merkle.Proof,
	derivedAt time.Time,
	anchorType pb.Anchor_Type,
	anchorID string,
	anchorURI string,
) (
	path *ChpPath,
	er error,
)

NewChpPathFromMerkleProof creates a new ChpPath proof from the given merkle proof

func (*ChpPath) Marshal

func (c *ChpPath) Marshal() ([]byte, error)

Marshal marshals current ChpPath

func (*ChpPath) Unmarshal

func (c *ChpPath) Unmarshal(data []byte) error

Unmarshal unmarshals current ChpPath

type EthTrie

type EthTrie struct {
	AnchorType    string   `json:"anchorType"`
	TxnID         string   `json:"txnId"`
	TxnURI        string   `json:"txnUri"`
	BlockTime     uint64   `json:"blockTime,omitempty"`
	BlockTimeNano uint64   `json:"blockTimeNano,omitempty"`
	BlockNumber   uint64   `json:"blockNumber,omitempty"`
	TrieNodes     [][]byte `json:"trieNodes,omitempty"`
}

EthTrie represents a confirmed proof for pieces of data in Ethereum Trie (ETH_TRIE) format

func NewEthTrie

func NewEthTrie(
	acType ap.Anchor_Type,
	txnID,
	txnURI string,
	pfTrie [][]byte,
) *EthTrie

NewEthTrie creates a new EthTrie

func (*EthTrie) Marshal

func (e *EthTrie) Marshal() ([]byte, error)

Marshal marshals current EthTrie

func (*EthTrie) Root

func (e *EthTrie) Root() []byte

Root returns current EthTrie's merkle root

func (*EthTrie) Unmarshal

func (e *EthTrie) Unmarshal(data []byte) error

Unmarshal unmarshals current EthTrie

type Proof

type Proof interface {
	// Unmarshal unmarshals to current proof.Data
	Unmarshal(data []byte) error
	// Marshal marshals current proof.Data
	Marshal() ([]byte, error)
}

Proof represents an existence proof in the `data` field of the result that is returned by the ProvenDB Anchor Service gRPC API

func NewProof

func NewProof(format ap.Proof_Format) (Proof, error)

NewProof returns a new proof