rpc: Correctly name arguments

test/functional/rpc_blockchain.py

@@ -133,7 +133,7 @@ class BlockchainTest(BitcoinTestFramework):
         assert_raises_rpc_error(-8, "Block is not in main chain", self.nodes[0].getchaintxstats, blockhash=blockhash)
         self.nodes[0].reconsiderblock(blockhash)
 
-        chaintxstats = self.nodes[0].getchaintxstats(1)
+        chaintxstats = self.nodes[0].getchaintxstats(nblocks=1)
         # 200 txs plus genesis tx
         assert_equal(chaintxstats['txcount'], 201)
         # tx rate should be 1 per 10 minutes, or 1/600
@@ -211,7 +211,7 @@ class BlockchainTest(BitcoinTestFramework):
 
         besthash = node.getbestblockhash()
         secondbesthash = node.getblockhash(199)
-        header = node.getblockheader(besthash)
+        header = node.getblockheader(blockhash=besthash)
 
         assert_equal(header['hash'], besthash)
         assert_equal(header['height'], 200)
@@ -287,7 +287,7 @@ class BlockchainTest(BitcoinTestFramework):
 
         def assert_waitforheight(height, timeout=2):
             assert_equal(
-                node.waitforblockheight(height, timeout)['height'],
+                node.waitforblockheight(height=height, timeout=timeout)['height'],
                 current_height)
 
         assert_waitforheight(0)