RPC: unify arg type error message

We were throwing two different errors for the same problematic:

* "Expected type {expected], got {type}" --> RPCTypeCheckArgument()
* "JSON value of type {type} is not of expected type {expected}" --> UniValue::checkType()

Author: furszy

src/rpc/util.cpp

@@ -50,7 +50,8 @@ void RPCTypeCheck(const UniValue& params,
 void RPCTypeCheckArgument(const UniValue& value, const UniValueType& typeExpected)
 {
     if (!typeExpected.typeAny && value.type() != typeExpected.type) {
-        throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Expected type %s, got %s", uvTypeName(typeExpected.type), uvTypeName(value.type())));
+        throw JSONRPCError(RPC_TYPE_ERROR,
+                           strprintf("JSON value of type %s is not of expected type %s", uvTypeName(value.type()), uvTypeName(typeExpected.type)));
     }
 }
 

test/functional/mempool_accept.py

@@ -65,7 +65,7 @@ def run_test(self):
         assert_equal(node.getmempoolinfo()['size'], self.mempool_size)
 
         self.log.info('Should not accept garbage to testmempoolaccept')
-        assert_raises_rpc_error(-3, 'Expected type array, got string', lambda: node.testmempoolaccept(rawtxs='ff00baar'))
+        assert_raises_rpc_error(-3, 'JSON value of type string is not of expected type array', lambda: node.testmempoolaccept(rawtxs='ff00baar'))
         assert_raises_rpc_error(-8, 'Array must contain between 1 and 25 transactions.', lambda: node.testmempoolaccept(rawtxs=['ff22']*26))
         assert_raises_rpc_error(-8, 'Array must contain between 1 and 25 transactions.', lambda: node.testmempoolaccept(rawtxs=[]))
         assert_raises_rpc_error(-22, 'TX decode failed', lambda: node.testmempoolaccept(rawtxs=['ff00baar']))

test/functional/rpc_estimatefee.py

@@ -22,15 +22,15 @@ def run_test(self):
         assert_raises_rpc_error(-1, "estimaterawfee", self.nodes[0].estimaterawfee)
 
         # wrong type for conf_target
-        assert_raises_rpc_error(-3, "Expected type number, got string", self.nodes[0].estimatesmartfee, 'foo')
-        assert_raises_rpc_error(-3, "Expected type number, got string", self.nodes[0].estimaterawfee, 'foo')
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].estimatesmartfee, 'foo')
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].estimaterawfee, 'foo')
 
         # wrong type for estimatesmartfee(estimate_mode)
-        assert_raises_rpc_error(-3, "Expected type string, got number", self.nodes[0].estimatesmartfee, 1, 1)
+        assert_raises_rpc_error(-3, "JSON value of type number is not of expected type string", self.nodes[0].estimatesmartfee, 1, 1)
         assert_raises_rpc_error(-8, 'Invalid estimate_mode parameter, must be one of: "unset", "economical", "conservative"', self.nodes[0].estimatesmartfee, 1, 'foo')
 
         # wrong type for estimaterawfee(threshold)
-        assert_raises_rpc_error(-3, "Expected type number, got string", self.nodes[0].estimaterawfee, 1, 'foo')
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].estimaterawfee, 1, 'foo')
 
         # extra params
         assert_raises_rpc_error(-1, "estimatesmartfee", self.nodes[0].estimatesmartfee, 1, 'ECONOMICAL', 1)

test/functional/rpc_getblockfrompeer.py

@@ -56,8 +56,8 @@ def run_test(self):
 
         self.log.info("Arguments must be valid")
         assert_raises_rpc_error(-8, "hash must be of length 64 (not 4, for '1234')", self.nodes[0].getblockfrompeer, "1234", peer_0_peer_1_id)
-        assert_raises_rpc_error(-3, "Expected type string, got number", self.nodes[0].getblockfrompeer, 1234, peer_0_peer_1_id)
-        assert_raises_rpc_error(-3, "Expected type number, got string", self.nodes[0].getblockfrompeer, short_tip, "0")
+        assert_raises_rpc_error(-3, "JSON value of type number is not of expected type string", self.nodes[0].getblockfrompeer, 1234, peer_0_peer_1_id)
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].getblockfrompeer, short_tip, "0")
 
         self.log.info("We must already have the header")
         assert_raises_rpc_error(-1, "Block header missing", self.nodes[0].getblockfrompeer, "00" * 32, 0)

test/functional/rpc_getdescriptorinfo.py

@@ -29,7 +29,7 @@ def test_desc(self, desc, isrange, issolvable, hasprivatekeys):
 
     def run_test(self):
         assert_raises_rpc_error(-1, 'getdescriptorinfo', self.nodes[0].getdescriptorinfo)
-        assert_raises_rpc_error(-3, 'Expected type string', self.nodes[0].getdescriptorinfo, 1)
+        assert_raises_rpc_error(-3, 'JSON value of type number is not of expected type string', self.nodes[0].getdescriptorinfo, 1)
         assert_raises_rpc_error(-5, "'' is not a valid descriptor function", self.nodes[0].getdescriptorinfo, "")
 
         # P2PK output with the specified public key.

test/functional/rpc_rawtransaction.py

@@ -180,7 +180,7 @@ def createrawtransaction_tests(self):
         assert_raises_rpc_error(-1, "createrawtransaction", self.nodes[0].createrawtransaction, [], {}, 0, False, 'foo')
 
         # Test `createrawtransaction` invalid `inputs`
-        assert_raises_rpc_error(-3, "Expected type array", self.nodes[0].createrawtransaction, 'foo', {})
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type array", self.nodes[0].createrawtransaction, 'foo', {})
         assert_raises_rpc_error(-1, "JSON value of type string is not of expected type object", self.nodes[0].createrawtransaction, ['foo'], {})
         assert_raises_rpc_error(-1, "JSON value of type null is not of expected type string", self.nodes[0].createrawtransaction, [{}], {})
         assert_raises_rpc_error(-8, "txid must be of length 64 (not 3, for 'foo')", self.nodes[0].createrawtransaction, [{'txid': 'foo'}], {})
@@ -226,12 +226,12 @@ def createrawtransaction_tests(self):
                                 self.nodes[0].createrawtransaction, [{'txid': TXID, 'vout': 0, 'sequence': MAX_BIP125_RBF_SEQUENCE+1}], {}, 0, True)
 
         # Test `createrawtransaction` invalid `locktime`
-        assert_raises_rpc_error(-3, "Expected type number", self.nodes[0].createrawtransaction, [], {}, 'foo')
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type number", self.nodes[0].createrawtransaction, [], {}, 'foo')
         assert_raises_rpc_error(-8, "Invalid parameter, locktime out of range", self.nodes[0].createrawtransaction, [], {}, -1)
         assert_raises_rpc_error(-8, "Invalid parameter, locktime out of range", self.nodes[0].createrawtransaction, [], {}, 4294967296)
 
         # Test `createrawtransaction` invalid `replaceable`
-        assert_raises_rpc_error(-3, "Expected type bool", self.nodes[0].createrawtransaction, [], {}, 0, 'foo')
+        assert_raises_rpc_error(-3, "JSON value of type string is not of expected type bool", self.nodes[0].createrawtransaction, [], {}, 0, 'foo')
 
         # Test that createrawtransaction accepts an array and object as outputs
         # One output