verifiable

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Versions in this module

v1

v1.3.2

Jan 27, 2025

Changes in this version

+ func AddDIDDataIntegrityProof(didDoc *did.Doc, context *DataIntegrityProofContext, ...) (*did.Doc, error)

+ func AddDIDLinkedDataProof(didDoc *did.Doc, context *LinkedDataProofContext, jsonldOpts ...processor.Opts) (*did.Doc, error)

+ func VerifyDIDProof(didDoc *did.Doc, opts ...VerifyDIDOpt) error

type DataIntegrityProofContext

+ Expires *time.Time

+ type VerifyDIDOpt func(opts *verifyDIDOpts)

+ func WithDIDDataIntegrityVerifier(v *dataintegrity.Verifier) VerifyDIDOpt

+ func WithDIDExpectedDataIntegrityFields(purpose, domain, challenge string) VerifyDIDOpt

+ func WithDIDExternalJSONLDContext(context ...string) VerifyDIDOpt

+ func WithDIDJSONLDDocumentLoader(documentLoader jsonld.DocumentLoader) VerifyDIDOpt

+ func WithDIDJSONLDOnlyValidRDF() VerifyDIDOpt

+ func WithDIDProofChecker(checker lddocument.ProofChecker) VerifyDIDOpt

v1.3.1

Dec 16, 2024

Changes in this version

+ var DefaultRelatedResourceValidator = NewRelatedResourceValidator()

+ func WithCache(cache *expirable.LRU[string, *CachedResource]) func(*RelatedResourceValidatorOptions)

+ func WithHTTPClient(client httpClient) func(*RelatedResourceValidatorOptions)

+ type CachedResource struct

+ Sha256Hash []byte

+ Sha384Hash []byte

+ Sha512Hash []byte

type CredentialContents

+ RelatedResources []RelatedResource

type CredentialOpt

+ func WithDisabledRelatedResourceCheck() CredentialOpt

+ func WithEnabledJSONLDTypesCheck() CredentialOpt

type PresentationOpt

+ func WithPresRelatedResourceCheck(checkRelatedResource bool) PresentationOpt

+ type RelatedResource struct

+ DigestMultiBase string

+ DigestSRI string

+ Id string

+ MediaType string

+ type RelatedResourceValidator struct

+ func (r *RelatedResourceValidator) Validate(credentials []*Credential) error

+ type RelatedResourceValidatorOptions struct

+ Cache *expirable.LRU[string, *CachedResource]

+ HTTPClient httpClient

v1.3.0

Dec 4, 2024

Changes in this version

+ const SchemaTemplateV1

+ const SchemaTemplateV2

+ const V1ContextID

+ const V1ContextURI

+ const V2ContextID

+ const V2ContextURI

+ const VCEnvelopedType

+ const VPEnvelopedType

+ func GetBaseContext(contexts []string) (string, error)

+ func GetBaseContextFromRawDocument(doc map[string]interface{}) (string, error)

+ func HasBaseContext(doc map[string]interface{}, ctx string) bool

+ func IsBaseContext(contexts []string, ctx string) bool

+ func JSONSchemaLoaderV1(opts ...SchemaOpt) string

+ func JSONSchemaLoaderV2(opts ...SchemaOpt) string

+ func NewDataURL(mediaType MediaType, encoding Encoding, data string) string

+ func ParseDataURL(url string) (MediaType, Encoding, string, error)

type CreatePresentationOpt

+ func WithBaseContext(ctx string) CreatePresentationOpt

type Credential

+ func (vc *Credential) WithModifiedValidFrom(wrapper *util.TimeWrapper) *Credential

+ func (vc *Credential) WithModifiedValidUntil(wrapper *util.TimeWrapper) *Credential

type CredentialOpt

+ func WithDefaultSchemaLoader(loader func(vcc *CredentialContents) string) CredentialOpt

+ type Encoding string

+ type Envelope struct

+ Context []string

+ ID string

+ Type []string

+ func (ec *Envelope) ToRawJSON() (JSONObject, error)

+ type EnvelopedCredentialParser struct

+ func (p *EnvelopedCredentialParser) Parse(vcData []byte, opts *credentialOpts) (*Credential, error)

+ type MediaType string

+ const VCMediaTypeCOSE

+ const VCMediaTypeJWT

+ const VCMediaTypeSDJWT

+ const VPMediaTypeCOSE

+ const VPMediaTypeJWT

+ const VPMediaTypeSDJWT

type Presentation

+ func (vp *Presentation) Clone() *Presentation

+ func (vp *Presentation) CreateCWTVP(aud []string, signatureAlg cose.Algorithm, signer cwt.ProofCreator, ...) (*Presentation, error)

+ func (vp *Presentation) CreateJWTVP(aud []string, signatureAlg JWSAlgorithm, signer jwt.ProofCreator, keyID string, ...) (*Presentation, error)

+ func (vp *Presentation) IsCWT() bool

+ func (vp *Presentation) IsJWT() bool

type PresentationOpt

+ func WithPresHolderCheck(checkHolder bool) PresentationOpt

v1.2.0

Sep 5, 2024

Changes in this version

+ const HeaderLabelTyp

+ func KeyTypeToCWSAlgo(keyType kmsapi.KeyType) (cose.Algorithm, error)

+ type CWTClaims struct

+ Audience string

+ Cti []byte

+ Expiry *josejwt.NumericDate

+ ID string

+ IssuedAt *josejwt.NumericDate

+ Issuer string

+ NotBefore *josejwt.NumericDate

+ Subject string

+ type CWTCredClaims struct

+ VC map[string]interface{}

+ func (jcc *CWTCredClaims) MarshaCOSE(signatureAlg cose.Algorithm, signer cwt.ProofCreator, keyID string) ([]byte, *cose.Sign1Message, error)

+ type CWTEnvelope struct

+ Sign1MessageParsed *cose.Sign1Message

+ Sign1MessageRaw []byte

+ type CWTPresClaims struct

+ Presentation rawPresentation

+ func (c *CWTPresClaims) MarshalCWT(signatureAlg cose.Algorithm, signer cwt.ProofCreator, keyID string) ([]byte, *cose.Sign1Message, error)

type Credential

+ CWTEnvelope *CWTEnvelope

+ func (vc *Credential) CWTClaims() (*CWTCredClaims, error)

+ func (vc *Credential) CreateSignedCOSEVC(signatureAlg cose.Algorithm, proofCreator cwt.ProofCreator, keyID string) (*Credential, error)

+ func (vc *Credential) IsCWT() bool

+ func (vc *Credential) MarshalAsCWTLD() ([]byte, error)

+ func (vc *Credential) MarshalAsCWTLDHex() (string, error)

+ func (vc *Credential) ToRawClaimsMap() JSONObject

+ func (vc *Credential) WithModifiedExpired(wrapper *util.TimeWrapper) *Credential

+ func (vc *Credential) WithModifiedIssued(wrapper *util.TimeWrapper) *Credential

+ func (vc *Credential) WithModifiedRefreshService(refreshService *TypedID) *Credential

+ type CredentialCBORParser struct

+ func (p *CredentialCBORParser) Parse(vcData []byte, vcOpts *credentialOpts) (*Credential, error)

+ type CredentialJSONParser struct

+ func (p *CredentialJSONParser) Parse(vcData []byte, vcOpts *credentialOpts) (*Credential, error)

type CredentialOpt

+ func WithCWTProofChecker(verifier cwt.ProofChecker) CredentialOpt

+ func WithJSONLDIncludeDetailedStructureDiffOnError() CredentialOpt

+ type CredentialParser interface

+ Parse func(vcData []byte, vcOpts *credentialOpts) (*Credential, error)

type Presentation

+ CWT *VpCWT

+ func (vp *Presentation) CWTClaims(audience []string, minimizeVP bool) (*CWTPresClaims, error)

+ func (vp *Presentation) MarshalCBOR() ([]byte, error)

+ type PresentationCWTParser struct

+ type PresentationJSONParser struct

+ type PresentationParser interface

+ type VpCWT struct

+ Message *cose.Sign1Message

+ Raw []byte

+ VPMap map[string]interface{}

v1.1.2

Jun 10, 2024

v1.1.1

Feb 22, 2024

v1.1.0

Nov 21, 2023

Changes in this version

+ func BBSSelectiveDisclosure(doc map[string]interface{}, revealDoc map[string]interface{}, nonce []byte, ...) (map[string]interface{}, error)

+ func SerializeSubject(subject []Subject) interface

+ type BBSProofCreator struct

+ ProofDerivation bbsProofDerivation

+ VerificationMethodResolver verificationMethodResolver

+ type CombinedProofChecker interface

+ CheckJWTProof func(headers jose.Headers, expectedProofIssuer string, msg, signature []byte) error

+ CheckLDProof func(proof *proof.Proof, expectedProofIssuer string, msg, signature []byte) error

+ GetLDPCanonicalDocument func(proof *proof.Proof, doc map[string]interface{}, opts ...processor.Opts) ([]byte, error)

+ GetLDPDigest func(proof *proof.Proof, doc []byte) ([]byte, error)

type Credential

+ JWTEnvelope *JWTEnvelope

+ func CreateCredential(vcc CredentialContents, customFields CustomFields) (*Credential, error)

+ func CreateCredentialWithProofs(vcc CredentialContents, customFields CustomFields, proofs []Proof) (*Credential, error)

+ func ParseCredentialJSON(vcJSON JSONObject, opts ...CredentialOpt) (*Credential, error)

+ func (vc *Credential) CheckProof(opts ...CredentialOpt) error

+ func (vc *Credential) Contents() CredentialContents

+ func (vc *Credential) CreateSignedJWTVC(minimizeVC bool, signatureAlg JWSAlgorithm, proofCreator jwt.ProofCreator, ...) (*Credential, error)

+ func (vc *Credential) CreateUnsecuredJWTVC(minimizeVC bool) (*Credential, error)

+ func (vc *Credential) CustomField(name string) interface{}

+ func (vc *Credential) IsJWT() bool

+ func (vc *Credential) JWTHeaders() jose.Headers

+ func (vc *Credential) MarshalAsJSONLD() ([]byte, error)

+ func (vc *Credential) ResetProofs(newProofs []Proof)

+ func (vc *Credential) SetCustomField(name string, value interface{})

+ func (vc *Credential) SetSDJWTDisclosures(disclosures []*common.DisclosureClaim) error

+ func (vc *Credential) ToJWTString() (string, error)

+ func (vc *Credential) ToRawJSON() JSONObject

+ func (vc *Credential) ToUniversalForm() (interface{}, error)

+ func (vc *Credential) ValidateCredential(opts ...CredentialOpt) error

+ func (vc *Credential) WithModifiedContext(context []string) *Credential

+ func (vc *Credential) WithModifiedID(id string) *Credential

+ func (vc *Credential) WithModifiedIssuer(issuer *Issuer) *Credential

+ func (vc *Credential) WithModifiedStatus(status *TypedID) *Credential

+ func (vc *Credential) WithModifiedSubject(subject []Subject) *Credential

+ type CredentialContents struct

+ Context []string

+ CustomContext []interface{}

+ Evidence Evidence

+ Expired *util.TimeWrapper

+ ID string

+ Issued *util.TimeWrapper

+ Issuer *Issuer

+ RefreshService []TypedID

+ SDJWTHashAlg *crypto.Hash

+ Schemas []TypedID

+ Status *TypedID

+ Subject []Subject

+ TermsOfUse []TypedID

+ Types []string

type CredentialOpt

+ func WithJWTProofChecker(verifier jwt.ProofChecker) CredentialOpt

+ func WithLDProofChecker(verifier lddocument.ProofChecker) CredentialOpt

+ func WithProofChecker(verifier CombinedProofChecker) CredentialOpt

type Issuer

+ func IssuerFromJSON(issuerObj JSONObject) (*Issuer, error)

+ type JSONObject = map[string]interface

+ func IssuerToJSON(issuer Issuer) JSONObject

+ func SubjectToJSON(subject Subject) JSONObject

type JWTCredClaims

+ func (jcc *JWTCredClaims) MarshalJWSString(signatureAlg JWSAlgorithm, signer jwt.ProofCreator, keyID string) (string, error)

+ type JWTEnvelope struct

+ JWT string

+ JWTHeaders jose.Headers

+ SDHolderBinding string

+ SDJWTDisclosures []*common.DisclosureClaim

+ SDJWTVersion common.SDJWTVersion

type LinkedDataProofContext

+ KeyType kms.KeyType

+ ProofCreator lddocument.ProofCreator

type PresentationOpt

+ func WithPresProofChecker(fetcher CombinedProofChecker) PresentationOpt

type Subject

+ func SubjectFromJSON(subjectObj JSONObject) (Subject, error)

v1.0.2

Sep 18, 2023

v1.0.1

Sep 15, 2023

v1.0.0

Sep 13, 2023

Changes in this version

+ const ContextID

+ const ContextURI

+ const DefaultSchemaTemplate

+ const VCType

+ const VPType

+ func CreateCustomCredential(vcData []byte, producers []CustomCredentialProducer, opts ...CredentialOpt) (interface{}, error)

+ func JSONSchemaLoader(opts ...SchemaOpt) string

+ func JWTVCToJSON(vc []byte) ([]byte, error)

+ func SubjectID(subject interface{}) (string, error)

+ type CreatePresentationOpt func(p *Presentation) error

+ func WithCredentials(cs ...*Credential) CreatePresentationOpt

+ func WithJWTCredentials(cs ...string) CreatePresentationOpt

+ type Credential struct

+ Context []string

+ CustomContext []interface{}

+ CustomFields CustomFields

+ Evidence Evidence

+ Expired *util.TimeWrapper

+ ID string

+ Issued *util.TimeWrapper

+ Issuer Issuer

+ JWT string

+ Proofs []Proof

+ RefreshService []TypedID

+ SDHolderBinding string

+ SDJWTDisclosures []*common.DisclosureClaim

+ SDJWTHashAlg string

+ SDJWTVersion common.SDJWTVersion

+ Schemas []TypedID

+ Status *TypedID

+ Subject interface{}

+ TermsOfUse []TypedID

+ Types []string

+ func ParseCredential(vcData []byte, opts ...CredentialOpt) (*Credential, error)

+ func (vc *Credential) AddDataIntegrityProof(context *DataIntegrityProofContext, signer *dataintegrity.Signer) error

+ func (vc *Credential) AddLinkedDataProof(context *LinkedDataProofContext, jsonldOpts ...processor.Opts) error

+ func (vc *Credential) CreateDisplayCredential(opts ...DisplayCredentialOption) (*Credential, error)

+ func (vc *Credential) CreateDisplayCredentialMap(opts ...DisplayCredentialOption) (map[string]interface{}, error)

+ func (vc *Credential) GenerateBBSSelectiveDisclosure(revealDoc map[string]interface{}, nonce []byte, opts ...CredentialOpt) (*Credential, error)

+ func (vc *Credential) JWTClaims(minimizeVC bool) (*JWTCredClaims, error)

+ func (vc *Credential) MakeSDJWT(signer jose.Signer, signingKeyID string, options ...MakeSDJWTOption) (string, error)

+ func (vc *Credential) MarshalJSON() ([]byte, error)

+ func (vc *Credential) MarshalWithDisclosure(opts ...MarshalDisclosureOption) (string, error)

+ type CredentialDecoder func(dataJSON []byte, vc *Credential) error

+ type CredentialOpt func(opts *credentialOpts)

+ func WithBaseContextExtendedValidation(customContexts, customTypes []string) CredentialOpt

+ func WithBaseContextValidation() CredentialOpt

+ func WithCredDisableValidation() CredentialOpt

+ func WithCredentialSchemaLoader(loader *CredentialSchemaLoader) CredentialOpt

+ func WithDataIntegrityVerifier(v *dataintegrity.Verifier) CredentialOpt

+ func WithDisabledProofCheck() CredentialOpt

+ func WithEmbeddedSignatureSuites(suites ...verifier.SignatureSuite) CredentialOpt

+ func WithExpectedDataIntegrityFields(purpose, domain, challenge string) CredentialOpt

+ func WithExternalJSONLDContext(context ...string) CredentialOpt

+ func WithJSONLDDocumentLoader(documentLoader jsonld.DocumentLoader) CredentialOpt

+ func WithJSONLDOnlyValidRDF() CredentialOpt

+ func WithJSONLDValidation() CredentialOpt

+ func WithNoCustomSchemaCheck() CredentialOpt

+ func WithPublicKeyFetcher(fetcher PublicKeyFetcher) CredentialOpt

+ func WithSchema(schema string) CredentialOpt

+ func WithStrictValidation() CredentialOpt

+ type CredentialSchemaLoader struct

+ type CredentialSchemaLoaderBuilder struct

+ func NewCredentialSchemaLoaderBuilder() *CredentialSchemaLoaderBuilder

+ func (b *CredentialSchemaLoaderBuilder) Build() *CredentialSchemaLoader

+ func (b *CredentialSchemaLoaderBuilder) SetCache(cache SchemaCache) *CredentialSchemaLoaderBuilder

+ func (b *CredentialSchemaLoaderBuilder) SetJSONLoader(loader gojsonschema.JSONLoader) *CredentialSchemaLoaderBuilder

+ func (b *CredentialSchemaLoaderBuilder) SetSchemaDownloadClient(client *http.Client) *CredentialSchemaLoaderBuilder

+ type CredentialTemplate func() *Credential

+ type CustomCredentialProducer interface

+ Accept func(vc *Credential) bool

+ Apply func(vc *Credential, dataJSON []byte) (interface{}, error)

+ type CustomFields map[string]interface

+ type DataIntegrityProofContext struct

+ Challenge string

+ Created *time.Time

+ CryptoSuite string

+ Domain string

+ ProofPurpose string

+ SigningKeyID string

+ type DisplayCredentialOption func(opts *displayCredOpts)

+ func DisplayAllDisclosures() DisplayCredentialOption

+ func DisplayGivenDisclosures(given []string) DisplayCredentialOption

+ type Evidence interface

+ type ExpirableSchemaCache struct

+ func NewExpirableSchemaCache(size int, expiration time.Duration) *ExpirableSchemaCache

+ func (sc *ExpirableSchemaCache) Get(k string) ([]byte, bool)

+ func (sc *ExpirableSchemaCache) Put(k string, v []byte)

+ type Issuer struct

+ CustomFields CustomFields

+ ID string

+ func (i *Issuer) MarshalJSON() ([]byte, error)

+ func (i *Issuer) UnmarshalJSON(data []byte) error

+ type JWSAlgorithm int

+ const ECDSASecp256k1

+ const ECDSASecp256r1

+ const ECDSASecp384r1

+ const ECDSASecp521r1

+ const EdDSA

+ const PS256

+ const RS256

+ func KeyTypeToJWSAlgo(keyType kmsapi.KeyType) (JWSAlgorithm, error)

+ func (ja JWSAlgorithm) Name() (string, error)

+ type JWTCredClaims struct

+ VC map[string]interface{}

+ func (jcc *JWTCredClaims) MarshalJWS(signatureAlg JWSAlgorithm, signer Signer, keyID string) (string, error)

+ func (jcc *JWTCredClaims) MarshalUnsecuredJWT() (string, error)

+ func (jcc *JWTCredClaims) ToSDJWTV5CredentialPayload() ([]byte, error)

+ func (jcc *JWTCredClaims) UnmarshalJSON(data []byte) error

+ type JWTCredClaimsUnmarshaller func(vcJWTBytes string) (jose.Headers, *JWTCredClaims, error)

+ type JWTPresClaims struct

+ Presentation *rawPresentation

+ func (jpc *JWTPresClaims) MarshalJWS(signatureAlg JWSAlgorithm, signer Signer, keyID string) (string, error)

+ func (jpc *JWTPresClaims) MarshalUnsecuredJWT() (string, error)

+ type JWTPresClaimsUnmarshaller func(vpJWT string) (*JWTPresClaims, error)

+ type JwtSigner struct

+ func GetJWTSigner(signer Signer, algorithm string) *JwtSigner

+ func (s JwtSigner) Headers() jose.Headers

+ func (s JwtSigner) Sign(data []byte) ([]byte, error)

+ type LinkedDataProofContext struct

+ CapabilityChain []interface{}

+ Challenge string

+ Created *time.Time

+ Domain string

+ Purpose string

+ SignatureRepresentation SignatureRepresentation

+ SignatureType string

+ Suite signer.SignatureSuite

+ VerificationMethod string

+ type MakeSDJWTOption func(opts *MakeSDJWTOpts)

+ func MakeSDJWTWithAlwaysIncludeObjects(alwaysIncludeObjects []string) MakeSDJWTOption

+ func MakeSDJWTWithHash(hash crypto.Hash) MakeSDJWTOption

+ func MakeSDJWTWithNonSelectivelyDisclosableClaims(nonSDClaims []string) MakeSDJWTOption

+ func MakeSDJWTWithRecursiveClaimsObjects(recursiveClaimsObject []string) MakeSDJWTOption

+ func MakeSDJWTWithVersion(version common.SDJWTVersion) MakeSDJWTOption

+ type MakeSDJWTOpts struct

+ func (o *MakeSDJWTOpts) GetAlwaysIncludeObject() []string

+ func (o *MakeSDJWTOpts) GetNonSDClaims() []string

+ func (o *MakeSDJWTOpts) GetRecursiveClaimsObject() []string

+ type MarshalDisclosureOption func(opts *marshalDisclosureOpts)

+ func DiscloseAll() MarshalDisclosureOption

+ func DiscloseGivenIfAvailable(disclosureNames []string) MarshalDisclosureOption

+ func DiscloseGivenRequired(disclosureNames []string) MarshalDisclosureOption

+ func DisclosureHolderBinding(binding *holder.BindingInfo) MarshalDisclosureOption

+ func DisclosureSigner(signer jose.Signer, signingKeyID string) MarshalDisclosureOption

+ func MarshalWithSDJWTVersion(version common.SDJWTVersion) MarshalDisclosureOption

+ type MarshalledCredential []byte

+ type Presentation struct

+ Context []string

+ CustomContext []interface{}

+ CustomFields CustomFields

+ Holder string

+ ID string

+ JWT string

+ Proofs []Proof

+ Type []string

+ func NewPresentation(opts ...CreatePresentationOpt) (*Presentation, error)

+ func ParsePresentation(vpData []byte, opts ...PresentationOpt) (*Presentation, error)

+ func (vp *Presentation) AddCredentials(credentials ...*Credential)

+ func (vp *Presentation) AddDataIntegrityProof(context *DataIntegrityProofContext, signer *dataintegrity.Signer) error

+ func (vp *Presentation) AddLinkedDataProof(context *LinkedDataProofContext, jsonldOpts ...ldprocessor.Opts) error

+ func (vp *Presentation) Credentials() []interface{}

+ func (vp *Presentation) JWTClaims(audience []string, minimizeVP bool) (*JWTPresClaims, error)

+ func (vp *Presentation) MarshalJSON() ([]byte, error)

+ func (vp *Presentation) MarshalledCredentials() ([]MarshalledCredential, error)

+ type PresentationOpt func(opts *presentationOpts)

+ func WithDisabledJSONLDChecks() PresentationOpt

+ func WithPresDataIntegrityVerifier(v *dataintegrity.Verifier) PresentationOpt

+ func WithPresDisabledProofCheck() PresentationOpt

+ func WithPresEmbeddedSignatureSuites(suites ...verifier.SignatureSuite) PresentationOpt

+ func WithPresExpectedDataIntegrityFields(purpose, domain, challenge string) PresentationOpt

+ func WithPresJSONLDDocumentLoader(documentLoader jsonld.DocumentLoader) PresentationOpt

+ func WithPresPublicKeyFetcher(fetcher PublicKeyFetcher) PresentationOpt

+ func WithPresStrictValidation() PresentationOpt

+ type Proof map[string]interface

+ type PublicKeyFetcher = didsignjwt.PublicKeyFetcher

+ func SingleKey(pubKey []byte, pubKeyType string) PublicKeyFetcher

+ type SchemaCache interface

+ Get func(k string) ([]byte, bool)

+ Put func(k string, v []byte)

+ type SchemaOpt func(*schemaOpts)

+ func WithDisableRequiredField(fieldName string) SchemaOpt

+ type SignatureRepresentation int

+ const SignatureJWS

+ const SignatureProofValue

+ type Signer interface

+ Alg func() string

+ Sign func(data []byte) ([]byte, error)

+ type Subject struct

+ CustomFields CustomFields

+ ID string

+ func (s *Subject) MarshalJSON() ([]byte, error)

+ func (s *Subject) UnmarshalJSON(data []byte) error

+ type TypedID struct

+ ID string

+ Type string

+ func (tid *TypedID) UnmarshalJSON(data []byte) error

+ func (tid TypedID) MarshalJSON() ([]byte, error)

+ type VDRKeyResolver struct

+ func NewVDRKeyResolver(vdr didResolver) *VDRKeyResolver

+ func (r *VDRKeyResolver) PublicKeyFetcher() PublicKeyFetcher

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