[tests] Rename segwit encode and decode functions

These functions can be exported to other modules,
so be explicit that they're encoding and decoding
segwit addresses

test/functional/test_framework/segwit_addr.py

@@ -84,7 +84,7 @@ def convertbits(data, frombits, tobits, pad=True):
     return ret
 
 
-def decode(hrp, addr):
+def decode_segwit_address(hrp, addr):
     """Decode a segwit address."""
     hrpgot, data = bech32_decode(addr)
     if hrpgot != hrp:
@@ -99,10 +99,10 @@ def decode(hrp, addr):
     return (data[0], decoded)
 
 
-def encode(hrp, witver, witprog):
+def encode_segwit_address(hrp, witver, witprog):
     """Encode a segwit address."""
     ret = bech32_encode(hrp, [witver] + convertbits(witprog, 8, 5))
-    if decode(hrp, ret) == (None, None):
+    if decode_segwit_address(hrp, ret) == (None, None):
         return None
     return ret
 
@@ -111,8 +111,8 @@ class TestFrameworkScript(unittest.TestCase):
         def test_python_bech32(addr):
             hrp = addr[:4]
             self.assertEqual(hrp, "bcrt")
-            (witver, witprog) = decode(hrp, addr)
-            self.assertEqual(encode(hrp, witver, witprog), addr)
+            (witver, witprog) = decode_segwit_address(hrp, addr)
+            self.assertEqual(encode_segwit_address(hrp, witver, witprog), addr)
 
         # P2WPKH
         test_python_bech32('bcrt1qthmht0k2qnh3wy7336z05lu2km7emzfpm3wg46')