commit e7f0c9fbfd14fa9424410b96247ca452d6f60862
parent c5052d41fd8cc0322a9d3da1e77b4d6f4404f102
Author: lash <dev@holbrook.no>
Date: Fri, 4 Aug 2023 18:09:28 +0100
Add readme, implement ACL for period checker
Diffstat:
10 files changed, 94 insertions(+), 12 deletions(-)
diff --git a/README.md b/README.md
@@ -0,0 +1,53 @@
+# eth-faucet
+
+A faucet implementation for ETH gas tokens, implementing the [CIC Faucet](https://git.grassecon.net/cicnet/cic-contracts#faucet) interface.
+
+
+## Setup
+
+Firstly, the faucet contract must be funded before use. It can be funded simply by sending gas tokens to it as a normal transaction.
+
+Secondly, the amount of gas tokens to emit must be changed using the `setAmount()` method. Only the contract "owner" or a "writer" (see below) may change the amount. The amount can be changed again at any time, until sealed.
+
+
+## Usage
+
+To receive gas tokens from the faucet, the method `giveTo(address)` or `gimme()` is used. The latter will send gas tokens to the address that signed the transaction.
+
+
+## Restricting accounts
+
+Usage of the faucet may be restricted by which addresses can request gas tokens from it.
+
+The list must be provided by a contract implementing the [CIC ACL](https://git.grassecon.net/cicnet/cic-contracts#acl) interface. The contract to use is defined using the `setRegistry()` method.
+
+
+## Restricting usage frequency
+
+Usage of the faucet may also be restricted by time delay.
+
+The usage control must be provided by a smart contract implementing the [CIC Throttle](https://git.grassecon.net/cicnet/cic-contracts#throttle) interface. The contract to use is defined using the `setPeriodChecker()` method.
+
+
+### Example usage frequency controller
+
+The `PeriodSimple` contract provided by this repository demonstrates an implementation of the usage frequency restriction.
+
+Only a single address has access to call the `poke(address)` method. This address is typically the contract providing the resource, and is defined by calling the `setPoker(address)` method.
+
+The number of seconds that must pass between each usage can be set using `setPeriod()`
+
+Using `setBalanceThreshold()` a maximum balance can be defined, to disallow use for addresses holding higher balances. (Note that this does not provide any real protection against agents, for example non-custioal wallets, that can forward the gas tokens at will).
+
+
+## Sealing the contracts
+
+The faucet contract implements the [CIC Seal](https://git.grassecon.net/cicnet/cic-contracts#seal) interface to enable sealing the parameters defining its behavior.
+
+The parameters that can be sealed are:
+
+- *Registry*, blocking the use of the `setRegistry()` method.
+- *Period checker*, blocking the use of the `setPeriodChecker()` method.
+- *Value*, blocking the use of the `setAmount()` method.
+
+The PeriodSimple contract does not implement the seal, but may discard ownedship through the [EIP173](https://eips.ethereum.org/EIPS/eip-173) interface, after which no parameters changing behavior can be modified.
diff --git a/python/eth_faucet/data/EthFaucet.bin b/python/eth_faucet/data/EthFaucet.bin
@@ -1 +1 @@
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diff --git a/python/eth_faucet/data/EthFaucet.metadata.json b/python/eth_faucet/data/EthFaucet.metadata.json
@@ -1 +1 @@
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diff --git a/python/eth_faucet/data/PeriodSimple.bin b/python/eth_faucet/data/PeriodSimple.bin
@@ -1 +1 @@
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diff --git a/python/eth_faucet/data/PeriodSimple.json b/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":"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"}]
+[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"BalanceThresholdChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","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":"have","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"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
diff --git a/python/eth_faucet/data/PeriodSimple.metadata.json b/python/eth_faucet/data/PeriodSimple.metadata.json
@@ -1 +1 @@
-{"compiler":{"version":"0.8.19+commit.7dd6d404"},"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}
+{"compiler":{"version":"0.8.19+commit.7dd6d404"},"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":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","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":"have","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"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"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":"0x26a14a08586c4bf6d7d63c8841fc2006d3806507ba8006ed408c126a26cb17f2","license":"AGPL-3.0-or-later","urls":["bzz-raw://d0faa1dd5ac0654492a70d92b544fc8c68fd4ee8982511a0abf1c8ae0255b32b","dweb:/ipfs/QmaJ2smxfBeBxumpTULvoYx7PCpQ1LfTg6aYCy89y3Q1m8"]}},"version":1}
diff --git a/python/eth_faucet/faucet.py b/python/eth_faucet/faucet.py
@@ -104,4 +104,3 @@ class EthFaucet(Faucet):
o['params'].append('latest')
o = j.finalize(o)
return o
-
diff --git a/python/setup.cfg b/python/setup.cfg
@@ -1,6 +1,6 @@
[metadata]
name = eth-faucet
-version = 0.3.5
+version = 0.4.0
description = Gas token gifter with controls from time intervals, amounts and access.
author = Louis Holbrook
author_email = dev@holbrook.no
diff --git a/solidity/EthFaucet.sol b/solidity/EthFaucet.sol
@@ -83,7 +83,7 @@ contract EthFaucet {
return true;
}
- (_ok, _result) = periodChecker.call(abi.encodeWithSignature("check(address)", _recipient));
+ (_ok, _result) = periodChecker.call(abi.encodeWithSignature("have(address)", _recipient));
if (!_ok) {
revert('ERR_PERIOD_BACKEND');
}
diff --git a/solidity/PeriodSimple.sol b/solidity/PeriodSimple.sol
@@ -13,6 +13,9 @@ contract PeriodSimple {
event PeriodChange(uint256 _value);
event BalanceThresholdChange(uint256 _value);
+ // Implements ERC173
+ event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // EIP173
+
constructor() {
owner = msg.sender;
poker = owner;
@@ -39,7 +42,8 @@ contract PeriodSimple {
return lastUsed[_subject] + period;
}
- function check(address _subject) external view returns(bool) {
+ //function check(address _subject) external view returns(bool) {
+ function have(address _subject) external view returns(bool) {
if (balanceThreshold > 0 && _subject.balance >= balanceThreshold) {
return false;
}
@@ -51,10 +55,36 @@ contract PeriodSimple {
function poke(address _subject) external returns(bool) {
require(msg.sender == owner || msg.sender == poker, 'ERR_ACCESS');
- if (!this.check(_subject)) {
+ if (!this.have(_subject)) {
return false;
}
lastUsed[_subject] = block.timestamp;
return true;
}
+
+ // Implements EIP173
+ function transferOwnership(address _newOwner) public returns (bool) {
+ address oldOwner;
+ require(msg.sender == owner, 'ERR_AXX');
+
+ oldOwner = owner;
+ owner = _newOwner;
+
+ emit OwnershipTransferred(oldOwner, owner);
+ return true;
+ }
+
+ // Implements ERC165
+ function supportsInterface(bytes4 _sum) public pure returns (bool) {
+ if (_sum == 0x01ffc9a7) { // ERC165
+ return true;
+ }
+ if (_sum == 0x9493f8b2) { // ERC173
+ return true;
+ }
+ if (_sum == 0x3ef25013) { // ACL
+ return true;
+ }
+ return false;
+ }
}
