core: add putAssetStateIntoStore()

Will be used by interops.

pkg/core/asset_state.go

@@ -27,6 +27,17 @@ func (a Assets) commit(b storage.Batch) error {
 	return nil
 }
 
+// putAssetStateIntoStore puts given asset state into the given store.
+func putAssetStateIntoStore(s storage.Store, as *AssetState) error {
+	buf := io.NewBufBinWriter()
+	as.EncodeBinary(buf.BinWriter)
+	if buf.Err != nil {
+		return buf.Err
+	}
+	key := storage.AppendPrefix(storage.STAsset, as.ID.Bytes())
+	return s.Put(key, buf.Bytes())
+}
+
 // AssetState represents the state of an NEO registered Asset.
 type AssetState struct {
 	ID         util.Uint256

pkg/core/asset_state_test.go

@@ -3,6 +3,7 @@ package core
 import (
 	"testing"
 
+	"github.com/CityOfZion/neo-go/pkg/core/storage"
 	"github.com/CityOfZion/neo-go/pkg/core/transaction"
 	"github.com/CityOfZion/neo-go/pkg/crypto/keys"
 	"github.com/CityOfZion/neo-go/pkg/io"
@@ -35,3 +36,25 @@ func TestEncodeDecodeAssetState(t *testing.T) {
 	assert.Nil(t, r.Err)
 	assert.Equal(t, asset, assetDecode)
 }
+
+func TestPutGetAssetState(t *testing.T) {
+	s := storage.NewMemoryStore()
+	asset := &AssetState{
+		ID:         randomUint256(),
+		AssetType:  transaction.Token,
+		Name:       "super cool token",
+		Amount:     util.Fixed8(1000000),
+		Available:  util.Fixed8(100),
+		Precision:  8,
+		FeeMode:    feeMode,
+		Owner:      &keys.PublicKey{},
+		Admin:      randomUint160(),
+		Issuer:     randomUint160(),
+		Expiration: 10,
+		IsFrozen:   false,
+	}
+	assert.NoError(t, putAssetStateIntoStore(s, asset))
+	asRead := getAssetStateFromStore(s, asset.ID)
+	assert.NotNil(t, asRead)
+	assert.Equal(t, asset, asRead)
+}