Add test of checksum_encode, using Keccak for ETH addr. upper/lower case

GNUmakefile

@@ -3,12 +3,21 @@ PY3		?= $(shell python3 --version >/dev/null 2>&1 && echo python3 || echo python
 VERSION		= $(shell $(PY3) -c 'from hdwallet import __version__; print( __version__.strip("v"))')
 WHEEL		= dist/hdwallet-$(VERSION)-py3-none-any.whl
 
+PY3TEST		= $(PY3) -m pytest
+
 .PHONY:			all test build build-check wheel install-dev install clean FORCE
 
 all:			build
 
 test:
-	$(PY3) -m pytest
+	$(PY3TEST)
+
+# Run only tests with a prefix containing the target string, eg test-blah
+test-%:
+	$(PY3TEST) *$*_test.py
+
+unit-%:
+	$(PY3TEST) -k $*
 
 build:			clean wheel
 

hdwallet/libs/base58.py

@@ -13,7 +13,7 @@
 
 def checksum_encode(address, crypto="eth"):
     out = ""
-    keccak_256 = keccak_pycryptodome.new(digest_bits=256)
+    keccak_256 = keccak.new(digest_bits=256)
     addr = address.lower().replace("0x", "") if crypto == "eth" else address.lower().replace("xdc", "")
     keccak_256.update(addr.encode("ascii"))
     hash_addr = keccak_256.hexdigest()

tests/test_base58.py

@@ -7,7 +7,7 @@
 import pytest
 
 from hdwallet.libs.base58 import (
-    check_encode, check_decode, decode, encode, string_to_int
+    checksum_encode, check_encode, check_decode, decode, encode, string_to_int
 )
 
 
@@ -36,6 +36,13 @@ def test_base58():
 
     assert encode(decode("111233QC4")) == "111233QC4"
 
+    # Ensure ETH address checksums are correct; these are Keccak hash of the lower-case hex address,
+    # with hash results mapped onto the upper/lower case bits of the address.
+    eth = "0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E"
+    eth_lower = eth.lower()
+    eth_check = checksum_encode( eth_lower )
+    assert eth_check == eth
+
 
 def test_keccak():
     """Keccak 256 hash is required by several crypto algorithms.  Ensure our hash implementations