Add nextbalance, update erc165 ids

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":"Give","type":"event"},{"anonymous":false,"inputs":[],"name":"ImNotGassy","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":"SealStateChange","type":"event"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":[{"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"}]
+[{"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":"Give","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":"SealStateChange","type":"event"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":[{"internalType":"address","name":"_subject","type":"address"}],"name":"nextBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","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":[{"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":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

python/eth_faucet/data/EthFaucet.metadata.json

@@ -1 +1 @@
-{"compiler":{"version":"0.8.18+commit.87f61d96"},"language":"Solidity","output":{"abi":[{"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":"Give","type":"event"},{"anonymous":false,"inputs":[],"name":"ImNotGassy","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":"SealStateChange","type":"event"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":[{"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"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"EthFaucet.sol":"EthFacuet"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"EthFaucet.sol":{"keccak256":"0x914fa90608a36d5d6082a1bdba168c849a3ea34d70d3dd6e1fef143554840f19","license":"GPL-3.0-or-later","urls":["bzz-raw://b4efbed22465930f683933bd5b4f74a74d1f53c0c34a1231fbedcff92a3eeba2","dweb:/ipfs/QmT6szY5nAEs1megXscAsYkM9rke8M8VLj3MrQEP5hTekn"]}},"version":1}
+{"compiler":{"version":"0.8.18+commit.87f61d96"},"language":"Solidity","output":{"abi":[{"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":"Give","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":"SealStateChange","type":"event"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"}],"name":"check","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":[{"internalType":"address","name":"_subject","type":"address"}],"name":"nextBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","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":[{"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":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"EthFaucet.sol":"EthFaucet"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"EthFaucet.sol":{"keccak256":"0x85367398c12bf0033a68f78bba295f0da103118367087818665838a544e50f5b","license":"AGPL-3.0-or-later","urls":["bzz-raw://58a2d7b0bd8ccc79cbd94b8cbe76fa5244dcec7bc9902df4806bbd65c078ea16","dweb:/ipfs/Qmex4jHTF37kL2FyeuCvumLKuK1NnHoqsFNcuyaDuwWUSz"]}},"version":1}

python/eth_faucet/data/PeriodSimple.metadata.json

@@ -1 +1 @@
-{"compiler":{"version":"0.8.18+commit.87f61d96"},"language":"Solidity","output":{"abi":[{"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":[{"internalType":"bool","name":"","type":"bool"}],"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"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"PeriodSimple.sol":"PeriodSimple"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"PeriodSimple.sol":{"keccak256":"0x45faa9b0307c14cd87913aa6719092b693d47962285f659d1d01680ee9820527","license":"GPL-3.0-or-later","urls":["bzz-raw://29186cc92b9f6324e2043abe9ac74787866992c00ffeb0e3fc81d345d8c04ed1","dweb:/ipfs/QmXJaGaWBBFbdyQWaAicjXN6aC2w5Yvr97kXVVimHWAN7i"]}},"version":1}
+{"compiler":{"version":"0.8.18+commit.87f61d96"},"language":"Solidity","output":{"abi":[{"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":[{"internalType":"bool","name":"","type":"bool"}],"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"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"PeriodSimple.sol":"PeriodSimple"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"PeriodSimple.sol":{"keccak256":"0xcf2111e332486f9179cdcd0c1acd16f1e0629f5a2b99edc12acfbd68dce65d67","license":"AGPL-3.0-or-later","urls":["bzz-raw://207648e1e831cd867c1fb9630aab499bed2cbd423b058825a31ae71061dc0a1b","dweb:/ipfs/Qmc5WdJo3MKYmEuc7SfVpXiEaKeTYfGFDA4fnwYPa5N2h9"]}},"version":1}

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = eth-faucet
-version = 0.3.2
+version = 0.3.3
 description = Gas token gifter with controls from time intervals, amounts and access.
 author = Louis Holbrook
 author_email = dev@holbrook.no

solidity/EthFaucet.sol

@@ -1,29 +1,42 @@
-pragma solidity >0.8.0;
+pragma solidity >=0.8.0;
 
-// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0-or-later
 
-contract EthFacuet {
+contract EthFaucet {
 
+	// Implements ERC173
 	address public owner;
-	address public registry;
+	address registry;
-	address public periodChecker;
+	address periodChecker;
+
+	// Implements Faucet
+	address constant public token = address(0);
+
+	// Implements Seal
 	uint256 public sealState;
+
 	uint256 amount;
 
 	uint8 constant REGISTRY_STATE = 1;
 	uint8 constant PERIODCHECKER_STATE = 2;
 	uint8 constant VALUE_STATE = 4;
+	// Implements Seal
 	uint256 constant public maxSealState = 7;
 
+	// Implements Faucet
 	event Give(address indexed _recipient, address indexed _token, uint256 _amount);
+	// Implements Faucet
 	event FaucetAmountChange(uint256 _amount);
+
+	// Implements Seal
 	event SealStateChange(uint256 indexed _sealState, address _registry, address _periodChecker);
-	event ImNotGassy();
 
 	constructor() {
 		owner = msg.sender;
 	}
 
+	// Set the given seal bits.
+	// Reverts if any bits are already set, if bit value is out of bounds.
 	function seal(uint256 _state) public returns(uint256) {
 		require(_state < 8, 'ERR_INVALID_STATE');
 		require(_state & sealState == 0, 'ERR_ALREADY_LOCKED');
@@ -32,6 +45,8 @@ contract EthFacuet {
 		return uint256(sealState);
 	}
 
+	// Change faucet amount.
+	// Reverts if VALUE_STATE seal is set.
 	function setAmount(uint256 _v) public returns(uint256) {
 		require(msg.sender == owner, 'ERR_NOT_OWNER');
 		require(sealState & VALUE_STATE == 0, 'ERR_SEALED');
@@ -40,6 +55,8 @@ contract EthFacuet {
 		return amount;
 	}
 
+	// Set period checker contract backend.
+	// Reverts if PERIODCHECKER_STATE seal is set
 	function setPeriodChecker(address _checker) public {
 		require(msg.sender == owner, 'ERR_NOT_OWNER');
 		require(sealState & PERIODCHECKER_STATE == 0, 'ERR_SEALED');
@@ -47,6 +64,8 @@ contract EthFacuet {
 		emit SealStateChange(sealState, registry, periodChecker);
 	}
 
+	// Set accounts index (Access Control List - ACL) backend.
+	// Reverts if REGISTRY_STATE seal is set
 	function setRegistry(address _registry) public {
 		require(msg.sender == owner, 'ERR_NOT_OWNER');
 		require(sealState & REGISTRY_STATE == 0, 'ERR_SEALED');
@@ -54,6 +73,8 @@ contract EthFacuet {
 		emit SealStateChange(sealState, registry, periodChecker);
 	}
 
+	// Return true if period checker backend allows usage of the faucet.
+	// Will always return true if period checker contract address has not been set.
 	function checkPeriod(address _recipient) private returns(bool) {
 		bool _ok;
 		bytes memory _result;
@@ -69,6 +90,8 @@ contract EthFacuet {
 		return _result[31] == 0x01;
 	}
 
+	// Return true if recipient has been added to the ACL.
+	// Will always return true if ACL contract address has not been set.
 	function checkRegistry(address _recipient) private returns(bool) {
 		bool _ok;
 		bytes memory _result;
@@ -84,10 +107,13 @@ contract EthFacuet {
 		return _result[31] == 0x01;
 	}
 
+	// Return false if contract does not have sufficient gas token balance to cover a single use.
+	// Used as backend for check.
 	function checkBalance() private view returns(bool) {
 		return amount <= address(this).balance;
 	}
 
+	// Check if a faucet usage attempt would succeed for the given recipient in the current contract state.
 	function check(address _recipient) public returns(bool) {
 		if (!checkPeriod(_recipient)) {
 			return false;
@@ -97,7 +123,8 @@ contract EthFacuet {
 		}
 		return checkBalance();
 	}
-	
+
+	// Execute a single faucet usage for recipient.
 	function checkAndPoke(address _recipient) private returns(bool){
 		bool _ok;
 		bytes memory _result;
@@ -124,6 +151,7 @@ contract EthFacuet {
 		return true;
 	}
 
+	// Implements Faucet
 	function gimme() public returns(uint256) {
 		require(checkAndPoke(msg.sender));
 		payable(msg.sender).transfer(amount);
@@ -131,6 +159,7 @@ contract EthFacuet {
 		return amount;
 	}
 
+	// Implements Faucet
 	function giveTo(address _recipient) public returns(uint256) {
 		require(checkAndPoke(_recipient));
 		payable(_recipient).transfer(amount);
@@ -138,6 +167,7 @@ contract EthFacuet {
 		return amount;
 	}
 
+	// Implements Faucet
 	function nextTime(address _subject) public returns(uint256) {
 		bool _ok;
 		bytes memory _result;
@@ -149,14 +179,41 @@ contract EthFacuet {
 		return uint256(bytes32(_result));
 	}
 
+	// Implements Faucet
+	function nextBalance(address _subject) public returns(uint256) {
+		bool _ok;
+		bytes memory _result;
+
+		(_ok, _result) = periodChecker.call(abi.encodeWithSignature("balanceThreshold()", _subject));
+		if (!_ok) {
+			revert('ERR_PERIOD_BACKEND_ERROR');
+		}
+		return uint256(bytes32(_result));
+
+	}
+
+	// Implements Faucet
 	function tokenAmount() public view returns(uint256) {
 		return amount;
 	}
 
-	function token() public pure returns(address) {
-		return address(0);
-	}
-
 	receive () payable external {
 	}
+
+	// Implements ERC165
+	function supportsInterface(bytes4 _sum) public pure returns (bool) {
+		if (_sum == 0x01ffc9a7) { // ERC165
+			return true;
+		}
+		if (_sum == 0x9493f8b2) { // ERC173
+			return true;
+		}
+		if (_sum == 0x1a3ac634) { // Faucet
+			return true;
+		}
+		if (_sum == 0x0d7491f8) { // Seal
+			return true;
+		}
+		return false;
+	}
 }

solidity/PeriodSimple.sol

@@ -1,6 +1,6 @@
-pragma solidity >0.8.0;
+pragma solidity >=0.8.0;
 
-// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0-or-later
 
 contract PeriodSimple {
 
@@ -12,6 +12,7 @@ contract PeriodSimple {
 
 	event PeriodChange(uint256 _value);
 	event BalanceThresholdChange(uint256 _value);
+
 	constructor() {
 		owner = msg.sender;
 		poker = owner;