rpc: add NEP11TokenInfo method

pkg/rpc/client/nep.go

@@ -3,6 +3,7 @@ package client
 import (
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
 )
 
 // nepDecimals invokes `decimals` NEP* method on a specified contract.
@@ -70,3 +71,20 @@ func (c *Client) nepBalanceOf(tokenHash, acc util.Uint160, tokenID *string) (int
 
 	return topIntFromStack(result.Stack)
 }
+
+// nepTokenInfo returns full NEP* token info.
+func (c *Client) nepTokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
+	cs, err := c.GetContractStateByHash(tokenHash)
+	if err != nil {
+		return nil, err
+	}
+	symbol, err := c.nepSymbol(tokenHash)
+	if err != nil {
+		return nil, err
+	}
+	decimals, err := c.nepDecimals(tokenHash)
+	if err != nil {
+		return nil, err
+	}
+	return wallet.NewToken(tokenHash, cs.Manifest.Name, symbol, decimals), nil
+}

pkg/rpc/client/nep11.go

@@ -35,6 +35,11 @@ func (c *Client) NEP11BalanceOf(tokenHash, owner util.Uint160) (int64, error) {
 	return c.nepBalanceOf(tokenHash, owner, nil)
 }
 
+// NEP11TokenInfo returns full NEP11 token info.
+func (c *Client) NEP11TokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
+	return c.nepTokenInfo(tokenHash)
+}
+
 // TransferNEP11 creates an invocation transaction that invokes 'transfer' method
 // on a given token to move the whole NEP11 token with the specified token ID to
 // given account and sends it to the network returning just a hash of it.

pkg/rpc/client/nep17.go

@@ -50,19 +50,7 @@ func (c *Client) NEP17BalanceOf(tokenHash, acc util.Uint160) (int64, error) {
 
 // NEP17TokenInfo returns full NEP17 token info.
 func (c *Client) NEP17TokenInfo(tokenHash util.Uint160) (*wallet.Token, error) {
-	cs, err := c.GetContractStateByHash(tokenHash)
+	return c.nepTokenInfo(tokenHash)
-	if err != nil {
-		return nil, err
-	}
-	symbol, err := c.NEP17Symbol(tokenHash)
-	if err != nil {
-		return nil, err
-	}
-	decimals, err := c.NEP17Decimals(tokenHash)
-	if err != nil {
-		return nil, err
-	}
-	return wallet.NewToken(tokenHash, cs.Manifest.Name, symbol, decimals), nil
 }
 
 // CreateNEP17TransferTx creates an invocation transaction for the 'transfer'

pkg/rpc/server/client_test.go

@@ -800,6 +800,16 @@ func TestClient_NEP11(t *testing.T) {
 		require.NoError(t, err)
 		require.Equal(t, "NNS", sym)
 	})
+	t.Run("TokenInfo", func(t *testing.T) {
+		tok, err := c.NEP11TokenInfo(h)
+		require.NoError(t, err)
+		require.Equal(t, &wallet.Token{
+			Name:     nativenames.NameService,
+			Hash:     h,
+			Decimals: 0,
+			Symbol:   "NNS",
+		}, tok)
+	})
 	t.Run("BalanceOf", func(t *testing.T) {
 		b, err := c.NEP11BalanceOf(h, acc)
 		require.NoError(t, err)