Consistently use ParseHashV to validate hash inputs in rpc

ParseHashV validates the length and encoding of the string and throws
an informative RPC error on failure, which is as good or better than
these alternative calls.

Note I switched ParseHashV to check string length first, because
IsHex tests that the length is even, and an error like:
"must be of length 64 (not 63, for X)" is much more informative than
"must be hexadecimal string (not X)"

test/functional/mining_prioritisetransaction.py

@@ -24,7 +24,8 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
         assert_raises_rpc_error(-1, "prioritisetransaction", self.nodes[0].prioritisetransaction, '', 0, 0, 0)
 
         # Test `prioritisetransaction` invalid `txid`
-        assert_raises_rpc_error(-1, "txid must be hexadecimal string", self.nodes[0].prioritisetransaction, txid='foo', fee_delta=0)
+        assert_raises_rpc_error(-8, "txid must be of length 64 (not 3, for 'foo')", self.nodes[0].prioritisetransaction, txid='foo', fee_delta=0)
+        assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'Zd1d4e24ed99057e84c3f80fd8fbec79ed9e1acee37da269356ecea000000000')", self.nodes[0].prioritisetransaction, txid='Zd1d4e24ed99057e84c3f80fd8fbec79ed9e1acee37da269356ecea000000000', fee_delta=0)
 
         # Test `prioritisetransaction` invalid `dummy`
         txid = '1d1d4e24ed99057e84c3f80fd8fbec79ed9e1acee37da269356ecea000000000'

test/functional/p2p_compactblocks.py

@@ -287,7 +287,7 @@ class CompactBlocksTest(BitcoinTestFramework):
         block_hash = int(node.generate(1)[0], 16)
 
         # Store the raw block in our internal format.
-        block = FromHex(CBlock(), node.getblock("%02x" % block_hash, False))
+        block = FromHex(CBlock(), node.getblock("%064x" % block_hash, False))
         for tx in block.vtx:
             tx.calc_sha256()
         block.rehash()

test/functional/p2p_sendheaders.py

@@ -402,7 +402,7 @@ class SendHeadersTest(BitcoinTestFramework):
 
             block_time += 9
 
-            fork_point = self.nodes[0].getblock("%02x" % new_block_hashes[0])["previousblockhash"]
+            fork_point = self.nodes[0].getblock("%064x" % new_block_hashes[0])["previousblockhash"]
             fork_point = int(fork_point, 16)
 
             # Use getblocks/getdata

test/functional/rpc_blockchain.py

@@ -125,7 +125,9 @@ class BlockchainTest(BitcoinTestFramework):
 
         # Test `getchaintxstats` invalid `blockhash`
         assert_raises_rpc_error(-1, "JSON value is not a string as expected", self.nodes[0].getchaintxstats, blockhash=0)
-        assert_raises_rpc_error(-5, "Block not found", self.nodes[0].getchaintxstats, blockhash='0')
+        assert_raises_rpc_error(-8, "blockhash must be of length 64 (not 1, for '0')", self.nodes[0].getchaintxstats, blockhash='0')
+        assert_raises_rpc_error(-8, "blockhash must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[0].getchaintxstats, blockhash='ZZZ0000000000000000000000000000000000000000000000000000000000000')
+        assert_raises_rpc_error(-5, "Block not found", self.nodes[0].getchaintxstats, blockhash='0000000000000000000000000000000000000000000000000000000000000000')
         blockhash = self.nodes[0].getblockhash(200)
         self.nodes[0].invalidateblock(blockhash)
         assert_raises_rpc_error(-8, "Block is not in main chain", self.nodes[0].getchaintxstats, blockhash=blockhash)
@@ -206,7 +208,9 @@ class BlockchainTest(BitcoinTestFramework):
     def _test_getblockheader(self):
         node = self.nodes[0]
 
-        assert_raises_rpc_error(-5, "Block not found", node.getblockheader, "nonsense")
+        assert_raises_rpc_error(-8, "hash must be of length 64 (not 8, for 'nonsense')", node.getblockheader, "nonsense")
+        assert_raises_rpc_error(-8, "hash must be hexadecimal string (not 'ZZZ7bb8b1697ea987f3b223ba7819250cae33efacb068d23dc24859824a77844')", node.getblockheader, "ZZZ7bb8b1697ea987f3b223ba7819250cae33efacb068d23dc24859824a77844")
+        assert_raises_rpc_error(-5, "Block not found", node.getblockheader, "0cf7bb8b1697ea987f3b223ba7819250cae33efacb068d23dc24859824a77844")
 
         besthash = node.getbestblockhash()
         secondbesthash = node.getblockhash(199)

test/functional/rpc_rawtransaction.py

@@ -76,8 +76,9 @@ class RawTransactionsTest(BitcoinTestFramework):
         txid = '1d1d4e24ed99057e84c3f80fd8fbec79ed9e1acee37da269356ecea000000000'
         assert_raises_rpc_error(-3, "Expected type array", self.nodes[0].createrawtransaction, 'foo', {})
         assert_raises_rpc_error(-1, "JSON value is not an object as expected", self.nodes[0].createrawtransaction, ['foo'], {})
-        assert_raises_rpc_error(-8, "txid must be hexadecimal string", self.nodes[0].createrawtransaction, [{}], {})
-        assert_raises_rpc_error(-8, "txid must be hexadecimal string", self.nodes[0].createrawtransaction, [{'txid': 'foo'}], {})
+        assert_raises_rpc_error(-1, "JSON value is not a string as expected", 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'}], {})
+        assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ7bb8b1697ea987f3b223ba7819250cae33efacb068d23dc24859824a77844')", self.nodes[0].createrawtransaction, [{'txid': 'ZZZ7bb8b1697ea987f3b223ba7819250cae33efacb068d23dc24859824a77844'}], {})
         assert_raises_rpc_error(-8, "Invalid parameter, missing vout key", self.nodes[0].createrawtransaction, [{'txid': txid}], {})
         assert_raises_rpc_error(-8, "Invalid parameter, missing vout key", self.nodes[0].createrawtransaction, [{'txid': txid, 'vout': 'foo'}], {})
         assert_raises_rpc_error(-8, "Invalid parameter, vout must be positive", self.nodes[0].createrawtransaction, [{'txid': txid, 'vout': -1}], {})
@@ -165,9 +166,10 @@ class RawTransactionsTest(BitcoinTestFramework):
         # We should not get the tx if we provide an unrelated block
         assert_raises_rpc_error(-5, "No such transaction found", self.nodes[0].getrawtransaction, tx, True, block2)
         # An invalid block hash should raise the correct errors
-        assert_raises_rpc_error(-8, "parameter 3 must be hexadecimal", self.nodes[0].getrawtransaction, tx, True, True)
-        assert_raises_rpc_error(-8, "parameter 3 must be hexadecimal", self.nodes[0].getrawtransaction, tx, True, "foobar")
-        assert_raises_rpc_error(-8, "parameter 3 must be of length 64", self.nodes[0].getrawtransaction, tx, True, "abcd1234")
+        assert_raises_rpc_error(-1, "JSON value is not a string as expected", self.nodes[0].getrawtransaction, tx, True, True)
+        assert_raises_rpc_error(-8, "parameter 3 must be of length 64 (not 6, for 'foobar')", self.nodes[0].getrawtransaction, tx, True, "foobar")
+        assert_raises_rpc_error(-8, "parameter 3 must be of length 64 (not 8, for 'abcd1234')", self.nodes[0].getrawtransaction, tx, True, "abcd1234")
+        assert_raises_rpc_error(-8, "parameter 3 must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[0].getrawtransaction, tx, True, "ZZZ0000000000000000000000000000000000000000000000000000000000000")
         assert_raises_rpc_error(-5, "Block hash not found", self.nodes[0].getrawtransaction, tx, True, "0000000000000000000000000000000000000000000000000000000000000000")
         # Undo the blocks and check in_active_chain
         self.nodes[0].invalidateblock(block1)

test/functional/rpc_txoutproof.py

@@ -62,12 +62,18 @@ class MerkleBlockTest(BitcoinTestFramework):
         txid_spent = txin_spent["txid"]
         txid_unspent = txid1 if txin_spent["txid"] != txid1 else txid2
 
+        # Invalid txids
+        assert_raises_rpc_error(-8, "txid must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[2].gettxoutproof, ["00000000000000000000000000000000"], blockhash)
+        assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[2].gettxoutproof, ["ZZZ0000000000000000000000000000000000000000000000000000000000000"], blockhash)
+        # Invalid blockhashes
+        assert_raises_rpc_error(-8, "blockhash must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[2].gettxoutproof, [txid_spent], "00000000000000000000000000000000")
+        assert_raises_rpc_error(-8, "blockhash must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[2].gettxoutproof, [txid_spent], "ZZZ0000000000000000000000000000000000000000000000000000000000000")
         # We can't find the block from a fully-spent tx
         assert_raises_rpc_error(-5, "Transaction not yet in block", self.nodes[2].gettxoutproof, [txid_spent])
         # We can get the proof if we specify the block
         assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_spent], blockhash)), [txid_spent])
         # We can't get the proof if we specify a non-existent block
-        assert_raises_rpc_error(-5, "Block not found", self.nodes[2].gettxoutproof, [txid_spent], "00000000000000000000000000000000")
+        assert_raises_rpc_error(-5, "Block not found", self.nodes[2].gettxoutproof, [txid_spent], "0000000000000000000000000000000000000000000000000000000000000000")
         # We can get the proof if the transaction is unspent
         assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_unspent])), [txid_unspent])
         # We can get the proof if we provide a list of transactions and one of them is unspent. The ordering of the list should not matter.

test/functional/wallet_basic.py

@@ -122,9 +122,15 @@ class WalletTest(BitcoinTestFramework):
         assert_equal([unspent_0], self.nodes[2].listlockunspent())
         self.nodes[2].lockunspent(True, [unspent_0])
         assert_equal(len(self.nodes[2].listlockunspent()), 0)
-        assert_raises_rpc_error(-8, "Invalid parameter, unknown transaction",
+        assert_raises_rpc_error(-8, "txid must be of length 64 (not 34, for '0000000000000000000000000000000000')",
                                 self.nodes[2].lockunspent, False,
                                 [{"txid": "0000000000000000000000000000000000", "vout": 0}])
+        assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')",
+                                self.nodes[2].lockunspent, False,
+                                [{"txid": "ZZZ0000000000000000000000000000000000000000000000000000000000000", "vout": 0}])
+        assert_raises_rpc_error(-8, "Invalid parameter, unknown transaction",
+                                self.nodes[2].lockunspent, False,
+                                [{"txid": "0000000000000000000000000000000000000000000000000000000000000000", "vout": 0}])
         assert_raises_rpc_error(-8, "Invalid parameter, vout index out of bounds",
                                 self.nodes[2].lockunspent, False,
                                 [{"txid": unspent_0["txid"], "vout": 999}])

test/functional/wallet_listsinceblock.py

@@ -50,8 +50,10 @@ class ListSinceBlockTest (BitcoinTestFramework):
                                 "42759cde25462784395a337460bde75f58e73d3f08bd31fdc3507cbac856a2c4")
         assert_raises_rpc_error(-5, "Block not found", self.nodes[0].listsinceblock,
                                 "0000000000000000000000000000000000000000000000000000000000000000")
-        assert_raises_rpc_error(-5, "Block not found", self.nodes[0].listsinceblock,
+        assert_raises_rpc_error(-8, "blockhash must be of length 64 (not 11, for 'invalid-hex')", self.nodes[0].listsinceblock,
                                 "invalid-hex")
+        assert_raises_rpc_error(-8, "blockhash must be hexadecimal string (not 'Z000000000000000000000000000000000000000000000000000000000000000')", self.nodes[0].listsinceblock,
+                                "Z000000000000000000000000000000000000000000000000000000000000000")
 
     def test_reorg(self):
         '''