UTXO adjustments (#77)

* [TX] add empty asset validation

* Revert "[TX] add empty asset validation"

This reverts commit 66e99cc

* [TX] return only user's address for delegation related txs

types/v1/tx.go

@@ -237,8 +237,8 @@ func cleanMemo(memo string) string {
 
 func (t *Tx) GetAddresses() []string {
 	addresses := make([]string, 0)
-	switch t.Metadata.(type) {
-	case *Transfer, *ContractCall:
+	switch t.Type {
+	case TxTransfer:
 		if len(t.Inputs) > 0 || len(t.Outputs) > 0 {
 			uniqueAddresses := make(map[string]struct{})
 			for _, input := range t.Inputs {
@@ -257,6 +257,12 @@ func (t *Tx) GetAddresses() []string {
 		}
 
 		return append(addresses, t.From, t.To)
+	case TxContractCall:
+		return append(addresses, t.From, t.To)
+	case TxStakeDelegate, TxStakeRedelegate:
+		return append(addresses, t.From)
+	case TxStakeUndelegate, TxStakeClaimRewards:
+		return append(addresses, t.To)
 	default:
 		return addresses
 	}

types/v1/tx_test.go

@@ -129,6 +129,7 @@ func TestTx_GetAddresses(t *testing.T) {
 		{
 			name: "transfer",
 			tx: Tx{
+				Type:     TxTransfer,
 				From:     "from",
 				To:       "to",
 				Metadata: &Transfer{},
@@ -138,15 +139,27 @@ func TestTx_GetAddresses(t *testing.T) {
 		{
 			name: "delegation",
 			tx: Tx{
+				Type:     TxStakeDelegate,
 				From:     "from",
 				To:       "to",
 				Metadata: &Transfer{},
 			},
-			expected: []string{"from", "to"},
+			expected: []string{"from"},
+		},
+		{
+			name: "undelegation",
+			tx: Tx{
+				Type:     TxStakeUndelegate,
+				From:     "from",
+				To:       "to",
+				Metadata: &Transfer{},
+			},
+			expected: []string{"to"},
 		},
 		{
 			name: "contract_call",
 			tx: Tx{
+				Type:     TxContractCall,
 				From:     "from",
 				To:       "to",
 				Metadata: &ContractCall{},
@@ -156,6 +169,7 @@ func TestTx_GetAddresses(t *testing.T) {
 		{
 			name: "any_action",
 			tx: Tx{
+				Type:     TxTransfer,
 				From:     "from",
 				To:       "to",
 				Metadata: &Transfer{},
@@ -165,11 +179,12 @@ func TestTx_GetAddresses(t *testing.T) {
 		{
 			name: "redelegation",
 			tx: Tx{
-				From:     "from_validator",
+				Type:     TxStakeRedelegate,
+				From:     "from",
 				To:       "to_validator",
 				Metadata: &Transfer{},
 			},
-			expected: []string{"from_validator", "to_validator"},
+			expected: []string{"from"},
 		},
 		{
 			name: "undefined",
@@ -182,6 +197,7 @@ func TestTx_GetAddresses(t *testing.T) {
 		{
 			name: "utxo",
 			tx: Tx{
+				Type:     TxTransfer,
 				From:     "from_utxo",
 				To:       "from_utxo",
 				Inputs:   []TxOutput{{Address: "from_utxo"}},