[dev] token-related method

Author: nanmu42

account.go

@@ -113,3 +113,15 @@ func (c *Client) UnclesMinedByAddress(address string, page int, offset int) (min
 	err = c.call("account", "getminedblocks", param, &mined)
 	return
 }
+
+// TokenBalance get erc20-token account balance of address for contractAddress
+func (c *Client) TokenBalance(contractAddress, address string) (balance *BigInt, err error) {
+	param := M{
+		"contractaddress": contractAddress,
+		"address":         address,
+		"tag":             "latest",
+	}
+
+	err = c.call("account", "tokenbalance", param, &balance)
+	return
+}

account_e2e_test.go

@@ -112,3 +112,12 @@ func TestClient_UnclesMinedByAddress(t *testing.T) {
 		t.Errorf("got txs length %v, want %v", len(blocks), wantLen)
 	}
 }
+
+func TestClient_TokenBalance(t *testing.T) {
+	balance, err := api.TokenBalance("0x57d90b64a1a57749b0f932f1a3395792e12e7055", "0xe04f27eb70e025b78871a2ad7eabe85e61212761")
+	noError(t, err, "api.TokenBalance")
+
+	if balance.Int().Cmp(big.NewInt(0)) != 1 {
+		t.Errorf("api.TokenBalance not working, got balance %s", balance.Int().String())
+	}
+}

stat.go

@@ -18,3 +18,13 @@ func (c *Client) EtherLatestPrice() (price LatestPrice, err error) {
 	err = c.call("stats", "ethprice", nil, &price)
 	return
 }
+
+// TokenTotalSupply gets total supply of token on specified contract address
+func (c *Client) TokenTotalSupply(contractAddress string) (totalSupply *BigInt, err error) {
+	param := M{
+		"contractaddress": contractAddress,
+	}
+
+	err = c.call("stats", "tokensupply", param, &totalSupply)
+	return
+}

stat_e2e_test.go

@@ -38,3 +38,12 @@ func TestClient_EtherLatestPrice(t *testing.T) {
 		t.Errorf("ETHUSDTimestamp is zero")
 	}
 }
+
+func TestClient_TokenTotalSupply(t *testing.T) {
+	totalSupply, err := api.TokenTotalSupply("0x57d90b64a1a57749b0f932f1a3395792e12e7055")
+	noError(t, err, "api.TokenTotalSupply")
+
+	if totalSupply.Int().Cmp(big.NewInt(100)) != 1 {
+		t.Errorf("api.TokenTotalSupply not working, totalSupply is %s", totalSupply.Int().String())
+	}
+}