rpc: drop support for getassetstate

It's for UTXO assets and it's absent in Neo 3.

pkg/rpc/client/doc.go

@@ -20,7 +20,6 @@ Supported methods
 
 	getaccountstate
 	getapplicationlog
-	getassetstate
 	getbestblockhash
 	getblock
 	getblockcount

pkg/rpc/client/rpc.go

@@ -40,18 +40,6 @@ func (c *Client) GetApplicationLog(hash util.Uint256) (*result.ApplicationLog, e
 	return resp, nil
 }
 
-// GetAssetState queries the asset information, based on the specified asset number.
-func (c *Client) GetAssetState(hash util.Uint256) (*result.AssetState, error) {
-	var (
-		params = request.NewRawParams(hash.StringLE())
-		resp   = &result.AssetState{}
-	)
-	if err := c.performRequest("getassetstate", params, resp); err != nil {
-		return nil, err
-	}
-	return resp, nil
-}
-
 // GetBestBlockHash returns the hash of the tallest block in the main chain.
 func (c *Client) GetBestBlockHash() (util.Uint256, error) {
 	var resp = util.Uint256{}

pkg/rpc/client/rpc_test.go

@@ -204,30 +204,6 @@ var rpcClientTestCases = map[string][]rpcClientTestCase{
 			},
 		},
 	},
-	"getassetstate": {
-		{
-			name: "positive",
-			invoke: func(c *Client) (interface{}, error) {
-				return c.GetAssetState(util.Uint256{})
-			},
-			serverResponse: `{"id":1,"jsonrpc":"2.0","result":{"id":"0x1a5e0e3eac2abced7de9ee2de0820a5c85e63756fcdfc29b82fead86a7c07c78","type":0,"name":"NEO","amount":"100000000","available":"100000000","precision":0,"owner":"00","admin":"Abf2qMs1pzQb8kYk9RuxtUb9jtRKJVuBJt","issuer":"AFmseVrdL9f9oyCzZefL9tG6UbvhPbdYzM","expiration":4000000,"is_frozen":false}}`,
-			result: func(c *Client) interface{} {
-				return &result.AssetState{
-					ID:         core.GoverningTokenID(),
-					AssetType:  0,
-					Name:       "NEO",
-					Amount:     util.Fixed8FromInt64(100000000),
-					Available:  util.Fixed8FromInt64(100000000),
-					Precision:  0,
-					Owner:      "00",
-					Admin:      "Abf2qMs1pzQb8kYk9RuxtUb9jtRKJVuBJt",
-					Issuer:     "AFmseVrdL9f9oyCzZefL9tG6UbvhPbdYzM",
-					Expiration: 4000000,
-					IsFrozen:   false,
-				}
-			},
-		},
-	},
 	"getbestblockhash": {
 		{
 			name: "positive",
@@ -981,12 +957,6 @@ var rpcClientErrorCases = map[string][]rpcClientErrorCase{
 				return c.GetApplicationLog(util.Uint256{})
 			},
 		},
-		{
-			name: "getassetstate_invalid_params_error",
-			invoke: func(c *Client) (interface{}, error) {
-				return c.GetAssetState(core.GoverningTokenID())
-			},
-		},
 		{
 			name: "getbestblockhash_invalid_params_error",
 			invoke: func(c *Client) (interface{}, error) {
@@ -1145,12 +1115,6 @@ var rpcClientErrorCases = map[string][]rpcClientErrorCase{
 				return c.GetApplicationLog(util.Uint256{})
 			},
 		},
-		{
-			name: "getassetstate_unmarshalling_error",
-			invoke: func(c *Client) (interface{}, error) {
-				return c.GetAssetState(core.GoverningTokenID())
-			},
-		},
 		{
 			name: "getbestblockhash_unmarshalling_error",
 			invoke: func(c *Client) (interface{}, error) {