Add nextTime method

python/eth_faucet/data/EthFaucet.json

@@ -1 +1 @@
-[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetAmountChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetFail","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_sealState","type":"uint256"},{"indexed":false,"internalType":"address","name":"_registry","type":"address"},{"indexed":false,"internalType":"address","name":"_periodChecker","type":"address"}],"name":"FaucetStateChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetUsed","type":"event"},{"anonymous":false,"inputs":[],"name":"ImNotGassy","type":"event"},{"inputs":[],"name":"amount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gimme","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"giveTo","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxSealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodChecker","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"registry","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"seal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_v","type":"uint256"}],"name":"setAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_checker","type":"address"}],"name":"setPeriodChecker","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"setRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
+[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetAmountChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetFail","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_sealState","type":"uint256"},{"indexed":false,"internalType":"address","name":"_registry","type":"address"},{"indexed":false,"internalType":"address","name":"_periodChecker","type":"address"}],"name":"FaucetStateChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"FaucetUsed","type":"event"},{"anonymous":false,"inputs":[],"name":"ImNotGassy","type":"event"},{"inputs":[],"name":"gimme","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"giveTo","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxSealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"nextTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodChecker","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"registry","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_state","type":"uint256"}],"name":"seal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sealState","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_v","type":"uint256"}],"name":"setAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_checker","type":"address"}],"name":"setPeriodChecker","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"setRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"tokenAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

python/eth_faucet/data/PeriodSimple.json

@@ -1 +1 @@
-[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"PeriodChange","type":"event"},{"inputs":[],"name":"balanceThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastUsed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"period","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"poke","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"poker","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_threshold","type":"uint256"}],"name":"setBalanceThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_period","type":"uint256"}],"name":"setPeriod","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_poker","type":"address"}],"name":"setPoker","outputs":[],"stateMutability":"nonpayable","type":"function"}]
+[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"BalanceThresholdChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"PeriodChange","type":"event"},{"inputs":[],"name":"balanceThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastUsed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"next","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"period","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_subject","type":"address"}],"name":"poke","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"poker","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_threshold","type":"uint256"}],"name":"setBalanceThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_period","type":"uint256"}],"name":"setPeriod","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_poker","type":"address"}],"name":"setPoker","outputs":[],"stateMutability":"nonpayable","type":"function"}]

python/requirements.txt

@@ -1,2 +1,2 @@
 chainlib-eth~=0.4.8
-erc20-faucet~=0.5.0
+erc20-faucet~=0.6.0

python/tests/test_period.py

@@ -35,13 +35,13 @@ class TestFaucetPeriod(EthTesterCase):
     def setUp(self):
         super(TestFaucetPeriod, self).setUp()
         # DRY
+        self.conn = RPCConnection.connect(self.chain_spec, 'default')
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
+
         c = PeriodSimple(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
         (tx_hash_hex, o) = c.constructor(self.accounts[0])
         r = self.conn.do(o)
 
-        self.conn = RPCConnection.connect(self.chain_spec, 'default')
-        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
-
         f = open(os.path.join(datadir, 'PeriodSimple.bin'))
         period_store_bytecode = f.read()
         f.close()
@@ -207,5 +207,35 @@ class TestFaucetPeriod(EthTesterCase):
         self.assertEqual(r['status'], 1)
 
 
+    def test_period_front(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
+        c = TxFactory(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        enc = ABIContractEncoder()
+        enc.method('setPeriod')
+        enc.typ(ABIContractType.UINT256)
+        enc.uint256(100)
+        data = enc.get()
+        tx = c.template(self.accounts[0], self.period_store_address, use_nonce=True)
+        tx = c.set_code(tx, data)
+        (tx_hash_hex, o) = c.finalize(tx)
+        self.conn.do(o)
+   
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
+        c = EthFaucet(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash_hex, o) = c.gimme(self.address, self.accounts[0])
+        self.conn.do(o)
+        o = receipt(tx_hash_hex)
+        r = self.conn.do(o)
+        o = block_by_number(r['block_number'])
+        r = self.conn.do(o)
+        thistime = r['timestamp']
+
+        o = c.next_time(self.address, self.accounts[0], sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        nexttime = int(r, 16)
+
+        self.assertEqual(nexttime, thistime+100)
+
+
 if __name__ == '__main__':
     unittest.main()

solidity/EthFaucet.sol

@@ -8,7 +8,7 @@ contract EthFacuet {
 	address public registry;
 	address public periodChecker;
 	uint256 public sealState;
-	uint256 public amount;
+	uint256 amount;
 
 	uint8 constant REGISTRY_STATE = 1;
 	uint8 constant PERIODCHECKER_STATE = 2;
@@ -125,6 +125,25 @@ contract EthFacuet {
 		return amount;
 	}
 
+	function nextTime(address _subject) public returns(uint256) {
+		bool _ok;
+		bytes memory _result;
+
+		(_ok, _result) = periodChecker.call(abi.encodeWithSignature("next(address)", _subject));
+		if (!_ok) {
+			revert('ERR_PERIOD_BACKEND_ERROR');
+		}
+		return uint256(bytes32(_result));
+	}
+
+	function tokenAmount() public view returns(uint256) {
+		return amount;
+	}
+
+	function token() public pure returns(address) {
+		return address(0);
+	}
+
 	receive () payable external {
 	}
 }

solidity/PeriodSimple.sol

@@ -34,17 +34,21 @@ contract PeriodSimple {
 		emit BalanceThresholdChange(_threshold);
 	}
 
-	function check(address _subject) public view returns(bool) {
+	function next(address _subject) external view returns(uint256) {
+		return lastUsed[_subject] + period;
+	}
+	
+	function check(address _subject) external view returns(bool) {
 		require(_subject.balance >= balanceThreshold);
 		if (lastUsed[_subject] == 0) {
 			return true;
 		}
-		return block.timestamp > lastUsed[_subject] + period;
+		return block.timestamp > this.next(_subject);
 	}
 
-	function poke(address _subject) public {
+	function poke(address _subject) external {
 		require(msg.sender == owner || msg.sender == poker, 'ERR_ACCESS');
-		require(check(_subject), 'ERR_PREMATURE');
+		require(this.check(_subject), 'ERR_PREMATURE');
 		lastUsed[_subject] = block.timestamp;
 	}
 }