feat: Add default resource url (#464)

feat: Add default ressource url

x/resource/genesis.go

@@ -23,7 +23,11 @@ func ExportGenesis(ctx sdk.Context, k keeper.Keeper) *types.GenesisState {
 	genesis := types.GenesisState{}
 
 	// Get all resource
-	resourceList := k.GetAllResources(&ctx)
+	resourceList, err := k.GetAllResources(&ctx)
+	if err != nil {
+		panic(fmt.Sprintf("Cannot get all resource: %s", err.Error()))
+	}
+
 	for _, elem := range resourceList {
 		genesis.Resources = append(genesis.Resources, &elem)
 	}

x/resource/keeper/keeper_resource.go

@@ -40,6 +40,26 @@ func (k Keeper) SetResourceCount(ctx *sdk.Context, count uint64) {
 	store.Set(byteKey, bz)
 }
 
+func (k Keeper) AddNewResourceVersion(ctx *sdk.Context, resource *types.ResourceWithMetadata) error {
+	// Find previous version and upgrade backward and forward version links
+	previousResourceVersionHeader, found := k.GetLastResourceVersionMetadata(ctx, resource.Metadata.CollectionId, resource.Metadata.Name, resource.Metadata.ResourceType)
+	if found {
+		// Set links
+		previousResourceVersionHeader.NextVersionId = resource.Metadata.Id
+		resource.Metadata.PreviousVersionId = previousResourceVersionHeader.Id
+
+		// Update previous version
+		err := k.UpdateResourceMetadata(ctx, &previousResourceVersionHeader)
+		if err != nil {
+			return err
+		}
+	}
+
+	// Set new version
+	err := k.SetResource(ctx, resource)
+	return err
+}
+
 // SetResource create or update a specific resource in the store
 func (k Keeper) SetResource(ctx *sdk.Context, resource *types.ResourceWithMetadata) error {
 	if !k.HasResource(ctx, resource.Metadata.CollectionId, resource.Metadata.Id) {
@@ -157,33 +177,35 @@ func (k Keeper) UpdateResourceMetadata(ctx *sdk.Context, metadata *types.Metadat
 	return nil
 }
 
-// GetAllResources returns all resources as a list
-// Loads everything in memory. Use only for genesis export!
-func (k Keeper) GetAllResources(ctx *sdk.Context) (list []types.ResourceWithMetadata) {
-	metadataIterator := sdk.KVStorePrefixIterator(ctx.KVStore(k.storeKey), didutils.StrBytes(types.ResourceMetadataKey))
-	dataIterator := sdk.KVStorePrefixIterator(ctx.KVStore(k.storeKey), didutils.StrBytes(types.ResourceDataKey))
+func (k Keeper) IterateAllResourceMetadatas(ctx *sdk.Context, callback func(metadata types.Metadata) (continue_ bool)) {
+	headerIterator := sdk.KVStorePrefixIterator(ctx.KVStore(k.storeKey), didutils.StrBytes(types.ResourceMetadataKey))
+	defer closeIteratorOrPanic(headerIterator)
 
-	defer closeIteratorOrPanic(metadataIterator)
-	defer closeIteratorOrPanic(dataIterator)
+	for headerIterator.Valid() {
+		var val types.Metadata
+		k.cdc.MustUnmarshal(headerIterator.Value(), &val)
 
-	for metadataIterator.Valid() {
-		if !dataIterator.Valid() {
-			panic("number of headers and data don't match")
+		if !callback(val) {
+			break
 		}
 
-		var metadata types.Metadata
-		k.cdc.MustUnmarshal(metadataIterator.Value(), &metadata)
-
-		data := types.Resource{Data: dataIterator.Value()}
+		headerIterator.Next()
+	}
+}
 
-		list = append(list, types.ResourceWithMetadata{
-			Metadata: &metadata,
-			Resource: &data,
-		})
+// GetAllResources returns all resources as a list
+// Loads everything in memory. Use only for genesis export!
+func (k Keeper) GetAllResources(ctx *sdk.Context) (list []types.ResourceWithMetadata, err_ error) {
+	k.IterateAllResourceMetadatas(ctx, func(metadata types.Metadata) bool {
+		resource, err := k.GetResource(ctx, metadata.CollectionId, metadata.Id)
+		if err != nil {
+			err_ = err
+			return false
+		}
 
-		metadataIterator.Next()
-		dataIterator.Next()
-	}
+		list = append(list, resource)
+		return true
+	})
 
 	return
 }

x/resource/keeper/msg_server_create_resource.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
+	"fmt"
 	"time"
 
 	"github.com/cheqd/cheqd-node/x/resource/utils"
@@ -15,6 +16,11 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
+const (
+	DefaultAlternativeUriTemplate    = "did:cheqd:%s:%s/resources/%s"
+	DefaultAlternaticeUriDescription = "did-url"
+)
+
 func (k msgServer) CreateResource(goCtx context.Context, msg *types.MsgCreateResource) (*types.MsgCreateResourceResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
@@ -62,22 +68,15 @@ func (k msgServer) CreateResource(goCtx context.Context, msg *types.MsgCreateRes
 	resource.Metadata.Created = ctx.BlockTime().Format(time.RFC3339)
 	resource.Metadata.MediaType = utils.DetectMediaType(resource.Resource.Data)
 
-	// Find previous version and upgrade backward and forward version links
-	previousResourceVersionHeader, found := k.GetLastResourceVersionMetadata(&ctx, resource.Metadata.CollectionId, resource.Metadata.Name, resource.Metadata.ResourceType)
-	if found {
-		// Set links
-		previousResourceVersionHeader.NextVersionId = resource.Metadata.Id
-		resource.Metadata.PreviousVersionId = previousResourceVersionHeader.Id
-
-		// Update previous version
-		err := k.UpdateResourceMetadata(&ctx, &previousResourceVersionHeader)
-		if err != nil {
-			return nil, err
-		}
+	// Add default resource alternative url
+	defaultAlternativeUrl := types.AlternativeUri{
+		Uri:         fmt.Sprintf(DefaultAlternativeUriTemplate, namespace, msg.Payload.CollectionId, msg.Payload.Id),
+		Description: DefaultAlternaticeUriDescription,
 	}
+	resource.Metadata.AlsoKnownAs = append(resource.Metadata.AlsoKnownAs, &defaultAlternativeUrl)
 
 	// Persist resource
-	err = k.SetResource(&ctx, &resource)
+	err = k.AddNewResourceVersion(&ctx, &resource)
 	if err != nil {
 		return nil, types.ErrInternal.Wrapf(err.Error())
 	}

x/resource/tests/create_resource_test.go

@@ -23,7 +23,13 @@ func ExpectPayloadToMatchResource(payload *resourcetypes.MsgCreateResourcePayloa
 	Expect(payload.CollectionId).To(Equal(resource.Metadata.CollectionId))
 	Expect(payload.Name).To(Equal(resource.Metadata.Name))
 	Expect(payload.ResourceType).To(Equal(resource.Metadata.ResourceType))
-	Expect(payload.AlsoKnownAs).To(Equal(resource.Metadata.AlsoKnownAs))
+
+	defaultAlternativeUrl := resourcetypes.AlternativeUri{
+		Uri:         "did:cheqd:" + didsetup.DID_NAMESPACE + ":" + payload.CollectionId + "/resources/" + payload.Id,
+		Description: "did-url",
+	}
+
+	Expect(append(payload.AlsoKnownAs, &defaultAlternativeUrl)).To(Equal(resource.Metadata.AlsoKnownAs))
 
 	// Generated header
 	hash := sha256.Sum256(payload.Data)