Prevent non-owner from changing seal, bump deps

python/CHANGELOG

@@ -1,3 +1,5 @@
+- 0.5.6
+	* Truncate approve maxuint value to tolerable value for contract.
 - 0.5.5
 	* Make allowance method public
 - 0.5.4

python/requirements.txt

@@ -1,5 +1,9 @@
-chainlib-eth~=0.4.11
-chainlib~=0.4.12
-eth-erc20~=0.7.0
-funga-eth~=0.6.0
+#chainlib-eth~=0.4.11
+#chainlib~=0.4.12
+#eth-erc20~=0.7.0
+#funga-eth~=0.6.0
+chainlib-eth~=0.6.1
+chainlib~=0.5.0
+eth-erc20~=0.9.0
+funga-eth~=0.8.0
 dexif~=0.0.2

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = erc20-demurrage-token
-version = 0.5.6
+version = 0.5.7
 description = ERC20 token with redistributed continual demurrage
 author = Louis Holbrook
 author_email = dev@holbrook.no

python/test_requirements.txt

@@ -1,2 +1,3 @@
-eth_tester==0.5.0b3
-py-evm==0.3.0a20
+eth_tester==0.10.0b4
+py-evm==0.10.0b4
+rlp==3.0.0

solidity/DemurrageTokenSingleNocap.sol

@@ -165,6 +165,7 @@ contract DemurrageTokenSingleNocap {
 	}
 
 	function seal(uint256 _state) public returns(uint256) {
+		require(msg.sender == owner);
 		require(_state < 16, 'ERR_INVALID_STATE');
 		require(_state & sealState == 0, 'ERR_ALREADY_LOCKED');
 		sealState |= _state;
@@ -599,8 +600,8 @@ contract DemurrageTokenSingleNocap {
 		
 		changePeriod();
 
-		// dex code will attempt uint256max approve, but contract cannot handle that size
-		// truncate to biggest possible value
+		// dex code will attempt uint256max approve, but basevalue calc is only valid up to a maximum of 2^63-1
+		// skip the base value calc for higher values
 		if (_value <= VALUE_LIMIT) {
 			baseValue = toBaseAmount(_value);
 		} else {