chainpoint

package module
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 Go to latest Published: Jan 12, 2022 License: MIT Imports: 22 Imported by: 0

README

Unofficial Chainpoint Client

import "github.com/boki/chainpoint"

Packages in chainpoint provide Go clients for the Chainpoint Node API.

Usage

License

All code distributed under the MIT License unless otherwise specified.

Documentation

Overview

Package chainpoint provides functionality to access the Chainpoint Node API.

A Chainpoint Node allows anyone to run a server that accepts hashes, anchors them to public blockchains, creates and verifies proofs, and participates in the Chainpoint Network.

Index

Constants

View Source 
const (
	// ChpContext is the value for Chainpoint.Context
	ChpContext = "https://w3id.org/chainpoint/v4"
	// ChpType is the value for Chainpoint.Type
	ChpType = "Chainpoint"
)
View Source 
const (
	AnchorCal  = "cal"
	AnchorBTC  = "btc"
	AnchorETH  = "eth"
	AnchorTCal = "tcal"
	AnchorTBTC = "tbtc"
)

Anchors ...

View Source 
const (
	ContentTypeJSON   = "application/vnd.chainpoint.ld+json"
	ContentTypeBase64 = "application/vnd.chainpoint.json+base64"
)

ContentTypes supported in responses.

View Source 
const UserAgent = "Chainpoint Node API Go Client"

UserAgent is the header string used to identify this package.

Variables

This section is empty.

Functions

func IsPerm 

func IsPerm(err error) bool

IsPerm gets a value indicating whether the error is a permission error.

func IsTemporary 

func IsTemporary(err error) bool

IsTemporary gets a value indicating whether the error is a temporary error.

func Marshal 

func Marshal(v interface{}) ([]byte, error)

Marshal ...

func Unmarshal 

func Unmarshal(data []byte, v interface{}) error

Unmarshal ...

Types

type Anchor 

type Anchor struct {
	Type     string   `json:"type"`
	AnchorID string   `json:"anchor_id"`
	URIs     []string `json:"uris,omitempty"`
}

Anchor ...

func (Anchor) Valid 

func (a Anchor) Valid() bool

Valid returns a value indicating whether the Anchor is valid.

type Branch 

type Branch struct {
	Label    string      `json:"label,omitempty"`
	Branches []Branch    `json:"branches,omitempty"`
	Ops      []Operation `json:"ops"`
}

Branch ...

func (Branch) Valid 

func (br Branch) Valid() bool

Valid returns a value indicating whether the Branch is valid.

type CalendarResponse 

type CalendarResponse struct {
	ID       int    `json:"id"`
	Time     int    `json:"time"`
	Version  int    `json:"version"`
	StackID  string `json:"stackId"`
	Type     string `json:"type"`
	DataID   string `json:"dataId"`
	DataVal  string `json:"dataVal"`
	PrevHash string `json:"prevHash"`
	Hash     string `json:"hash"`
	Sig      string `json:"sig"`
}

CalendarResponse ...

type Chainpoint 

type Chainpoint struct {
	Context      string   `json:"@context"`
	Type         string   `json:"type"`
	Hash         string   `json:"hash"`
	ProofID      string   `json:"proof_id"`
	HashReceived Time     `json:"hash_received"`
	Branches     []Branch `json:"branches"`
}

Chainpoint ...

func (*Chainpoint) MarshalBinary 

func (chp *Chainpoint) MarshalBinary() ([]byte, error)

MarshalBinary ...

func (*Chainpoint) UnmarshalBinary 

func (chp *Chainpoint) UnmarshalBinary(proof []byte) error

UnmarshalBinary unmarshales text into the Chainpoint structure.

func (*Chainpoint) Valid 

func (chp *Chainpoint) Valid() bool

Valid returns a value indicating whether the Chainpoint is valid.

type ConfigResponse 

type ConfigResponse struct {
	Version             string    `json:"version"`
	ProofExpireMinutes  int       `json:"proof_expire_minutes"`
	GetProofsMaxRest    int       `json:"get_proofs_max_rest"`
	PostHashesMax       int       `json:"post_hashes_max"`
	PostVerifyProofsMax int       `json:"post_verify_proofs_max"`
	Time                time.Time `json:"time"`
	Calendar            struct {
		Height        int    `json:"height"`
		AuditResponse string `json:"audit_response"`
	} `json:"calendar"`
}

ConfigResponse ...

type Error 

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

Error response from Chainpoint APIs.

func NewError 

func NewError(code int, msg string) *Error

NewError retruns a new Error given a status code and message.

func (*Error) Error 

func (e *Error) Error() string

Error returns the string representation of the error.

type HashItem 

type HashItem struct {
	ProofID string `json:"proof_id"`
	Hash    string `json:"hash"`
}

HashItem ...

type OpEnum 

type OpEnum string

OpEnum ... 

const (
	OpUnknown  OpEnum = ""
	OpSHA224   OpEnum = "sha-224"
	OpSHA256   OpEnum = "sha-256"
	OpSHA384   OpEnum = "sha-384"
	OpSHA512   OpEnum = "sha-512"
	OpSHA3224  OpEnum = "sha3-224"
	OpSHA3256  OpEnum = "sha3-256"
	OpSHA3384  OpEnum = "sha3-384"
	OpSHA3512  OpEnum = "sha3-512"
	OpSHA256x2 OpEnum = "sha-256-x2"
)

OpEnums introduced by package chainpoint.

type Operation 

type Operation struct {
	L       string   `json:"l,omitempty"`
	R       string   `json:"r,omitempty"`
	Op      OpEnum   `json:"op,omitempty"`
	Anchors []Anchor `json:"anchors,omitempty"`
}

Operation ...

func (Operation) Valid 

func (op Operation) Valid() bool

Valid returns a value indicating whether the Operation is valid.

type ParsedAnchor 

type ParsedAnchor struct {
	Type          string
	AnchorID      string
	URIs          []string
	ExpectedValue string
}

ParsedAnchor ...

type ParsedBranch 

type ParsedBranch struct {
	Label         string
	Branches      []ParsedBranch
	Anchors       []ParsedAnchor
	OpReturnValue string
	BTCTxID       string
}

ParsedBranch ...

type ParsedChainpoint 

type ParsedChainpoint struct {
	Hash         string
	ProofID      string
	HashReceived Time
	Branches     []ParsedBranch
}

ParsedChainpoint ...

func Parse 

func Parse(chp *Chainpoint) (*ParsedChainpoint, error)

Parse ...

type PostHash 

type PostHash struct {
	URI  string `json:"uri,omitempty"`
	Meta struct {
		SubmittedAt     time.Time       `json:"submitted_at"`
		ProcessingHints ProcessingHints `json:"processing_hints"`
	} `json:"meta"`
	Hashes []HashItem `json:"hashes"`
}

PostHash ...

type ProcessingHints 

type ProcessingHints map[string]time.Time

ProcessingHints ...

func (ProcessingHints) Next 

func (h ProcessingHints) Next(t time.Time) time.Time

Next returns the processing hint that is closest to t, or 0, if all hints are less than t.

type Proof 

type Proof struct {
	ProofID          string          `json:"proof_id"`         // The Version 1 UUID used to retrieve the proof.
	Proof            json.RawMessage `json:"proof"`            // The JSON or Base64 encoded binary form of the proof.
	AnchorsCompleted []string        `json:"anchors_complete"` // An Array that indicates which blockchains the proof is anchored to at the time of retrieval.
}

Proof ...

type Service 

type Service struct {
	UserAgent string // optional additional User-Agent fragment
	// contains filtered or unexported fields
}

A Service is a Chainpoint Node API client.

func New 

func New(client *http.Client) (*Service, error)

New initializes and returns a Service with given options.

func (*Service) Calendar 

func (s *Service) Calendar(ctx context.Context, uri, height string) (*CalendarResponse, error)

Calendar retrieves the calendar block at the given height.

func (*Service) CalendarData 

func (s *Service) CalendarData(ctx context.Context, uri, height string) (string, error)

CalendarData retrieves the calendar block data_val at the given height.

func (*Service) CalendarHash 

func (s *Service) CalendarHash(ctx context.Context, uri, height string) (string, error)

CalendarHash retrieves the calendar block hash at the given height.

func (*Service) Config 

func (s *Service) Config(ctx context.Context, uri string) (*ConfigResponse, error)

Config retrieves the configuration information for the Node.

func (*Service) Hashes 

func (s *Service) Hashes(ctx context.Context, uri string, hashes []string) (*PostHash, error)

Hashes submits one or more hashes to one Node, returning an array of proof handle objects, one for each submitted hash.

func (*Service) Proofs 

func (s *Service) Proofs(ctx context.Context, nodeURI string, proofIDs []string, contentType ...string) ([]*Proof, error)

Proofs retrieves a collection of proofs for one or more hash IDs from the specified Node URI.

func (*Service) Verify 

func (s *Service) Verify(ctx context.Context, uri string, proofs []*Chainpoint) ([]*VerifyResponse, error)

Verify submits one or more proofs for verification.

type Time 

type Time string

Time ...

func NewTime 

func NewTime(t time.Time) Time

NewTime ...

func (Time) String 

func (t Time) String() string

func (Time) Time 

func (t Time) Time() (time.Time, error)

Time ...

type VerifyResponse 

type VerifyResponse struct {
	ProofIndex   int                    `json:"proof_index"`
	Hash         string                 `json:"hash"`
	HashCore     string                 `json:"hash_core"`
	HashReceived time.Time              `json:"hash_received"`
	Anchors      []VerifyResponseAnchor `json:"anchors"`
	Status       string                 `json:"status"`
}

VerifyResponse ...

type VerifyResponseAnchor 

type VerifyResponseAnchor struct {
	Branch string `json:"branch"`
	Type   string `json:"type"`
	Valid  bool   `json:"valid"`
}

VerifyResponseAnchor ...

Source Files

View all Source files

Directories

Path Synopsis
cmd
chainpoint command
encoding
binary

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