Pass MerklizeOption[s] to MerklizeJSONLD (#69)

* Pass MerklizeOption[s] to MerklizeJSONLD

* Add merklizer options to ParseClaim method

Author: olomix

json/parser.go

@@ -47,6 +47,7 @@ func (s Parser) ParseClaim(ctx context.Context, credential verifiable.W3CCredent
 			SubjectPosition:       verifiable.CredentialSubjectPositionIndex,
 			MerklizedRootPosition: verifiable.CredentialMerklizedRootPositionNone,
 			Updatable:             false,
+			MerklizerOpts:         nil,
 		}
 	}
 
@@ -92,7 +93,7 @@ func (s Parser) ParseClaim(ctx context.Context, credential verifiable.W3CCredent
 
 	switch opts.MerklizedRootPosition {
 	case verifiable.CredentialMerklizedRootPositionIndex:
-		mkRoot, err := credential.Merklize(ctx)
+		mkRoot, err := credential.Merklize(ctx, opts.MerklizerOpts...)
 		if err != nil {
 			return nil, err
 		}
@@ -101,7 +102,7 @@ func (s Parser) ParseClaim(ctx context.Context, credential verifiable.W3CCredent
 			return nil, err
 		}
 	case verifiable.CredentialMerklizedRootPositionValue:
-		mkRoot, err := credential.Merklize(ctx)
+		mkRoot, err := credential.Merklize(ctx, opts.MerklizerOpts...)
 		if err != nil {
 			return nil, err
 		}

processor/processor.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	core "github.com/iden3/go-iden3-core"
+	"github.com/iden3/go-schema-processor/merklize"
 	"github.com/iden3/go-schema-processor/verifiable"
 	"github.com/pkg/errors"
 )
@@ -45,6 +46,7 @@ type CoreClaimOptions struct {
 	SubjectPosition       string `json:"subjectPosition"`
 	MerklizedRootPosition string `json:"merklizedRootPosition"`
 	Updatable             bool   `json:"updatable"`
+	MerklizerOpts         []merklize.MerklizeOption
 }
 
 var (

verifiable/credential.go

@@ -27,7 +27,8 @@ type W3CCredential struct {
 }
 
 // Merklize merklizes verifiable credential
-func (vc *W3CCredential) Merklize(ctx context.Context) (*merklize.Merklizer, error) {
+func (vc *W3CCredential) Merklize(ctx context.Context,
+	opts ...merklize.MerklizeOption) (*merklize.Merklizer, error) {
 
 	credentialBytes, err := json.Marshal(vc)
 	if err != nil {
@@ -46,7 +47,8 @@ func (vc *W3CCredential) Merklize(ctx context.Context) (*merklize.Merklizer, err
 		return nil, err
 	}
 
-	mk, err := merklize.MerklizeJSONLD(ctx, bytes.NewReader(credentialWithoutProofBytes))
+	mk, err := merklize.MerklizeJSONLD(ctx,
+		bytes.NewReader(credentialWithoutProofBytes), opts...)
 	if err != nil {
 		return nil, err
 	}