Merge #19722: test: Add test for getblockheader verboseness

5067c5acc30c5cf87496c1bf8eb03712cc66b206 [test] Add test for getblockheader verboseness (Torhte Butler)

Pull request description:

  Improve test coverage by adding a test for getblockheader with verbose argument set to false.

ACKs for top commit:
  theStack:
    ACK 5067c5acc3

Tree-SHA512: e55593f1026a89dc7b796fa985b4cbcdb596e91d80d42dfb0660bda1692aaa35749ec29f9cd7032803f6225afb323f085df1ef6a9982de87be8e098f7253cdd5

test/functional/rpc_blockchain.py

@@ -37,6 +37,8 @@ from test_framework.blocktools import (
     create_coinbase,
 )
 from test_framework.messages import (
+    CBlockHeader,
+    FromHex,
     msg_block,
 )
 from test_framework.mininode import (
@@ -234,6 +236,14 @@ class BlockchainTest(BitcoinTestFramework):
         assert isinstance(int(header['versionHex'], 16), int)
         assert isinstance(header['difficulty'], Decimal)
 
+        # Test with verbose=False, which should return the header as hex.
+        header_hex = node.getblockheader(blockhash=besthash, verbose=False)
+        assert_is_hex_string(header_hex)
+
+        header = FromHex(CBlockHeader(), header_hex)
+        header.calc_sha256()
+        assert_equal(header.hash, besthash)
+
     def _test_getdifficulty(self):
         difficulty = self.nodes[0].getdifficulty()
         # 1 hash in 2 should be valid, so difficulty should be 1/2**31