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git://holbrook.no/erc20-demurrage-token
synced 2024-12-22 03:57:31 +01:00
Add transfer, mint
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nolash
parent
8e60539245
commit
1a2b3bab37
GPG Key ID:
21D2E7BB88C2A746
@ -22,6 +22,7 @@ TAX_LEVEL = 10000 * 2 # 2%
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#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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PERIOD = 2
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class Test(unittest.TestCase):
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contract = None
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@ -55,26 +56,103 @@ class Test(unittest.TestCase):
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pass
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@unittest.skip('foo')
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def test_period(self):
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self.assertEqual(self.contract.functions.actualPeriod().call(), 0)
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self.eth_tester.mine_blocks(PERIOD)
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self.assertEqual(self.contract.functions.actualPeriod().call(), 1)
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@unittest.skip('foo')
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def test_mint(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact();
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(r.status, 1);
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call();
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self.assertEqual(balance, 1024);
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 976).transact();
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(r.status, 1);
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call();
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self.assertEqual(balance, 2000);
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def test_transfer(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact();
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(r.status, 1);
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]});
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(r.status, 1);
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call();
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self.assertEqual(balance_alice, 524);
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balance_bob = self.contract.functions.balanceOf(self.w3.eth.accounts[2]).call();
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self.assertEqual(balance_bob, 500);
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@unittest.skip('foo')
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def test_apply_tax(self):
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tx = self.contract.functions.noop().buildTransaction()
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logg.debug('gas {}'.format(self.w3.eth.estimateGas(tx)))
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(self.contract.functions.redistributionCount().call(), 2)
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self.assertEqual(self.contract.functions.demurrageModifier().call(), 980000)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact();
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(self.contract.functions.redistributionCount().call(), 2);
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self.assertEqual(self.contract.functions.demurrageModifier().call(), TAX_LEVEL);
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(self.contract.functions.redistributionCount().call(), 3)
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self.assertEqual(self.contract.functions.demurrageModifier().call(), 960400)
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@unittest.skip('foo')
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def test_tax_balance(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact();
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r = self.w3.eth.getTransactionReceipt(tx_hash);
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self.assertEqual(self.contract.functions.redistributionCount().call(), 3);
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self.assertEqual(self.contract.functions.demurrageModifier().call(), TAX_LEVEL * 2);
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance, 980)
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def test_taxed_transfer(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance_alice, 980000);
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500000).transact({'from': self.w3.eth.accounts[1]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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balance_alice_trunc = int(balance_alice/1000)*1000
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self.assertEqual(balance_alice_trunc, 480000)
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balance_bob = self.contract.functions.balanceOf(self.w3.eth.accounts[2]).call()
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balance_bob_trunc = int(balance_bob/1000)*1000
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self.assertEqual(balance_bob_trunc, 500000)
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if __name__ == '__main__':
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unittest.main()
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@ -12,26 +12,70 @@ contract RedistributedDemurrageToken {
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uint256 public periodStart;
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uint256 public periodDuration;
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uint32 public taxLevel;
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uint256 public demurrageModifier;
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uint256 public taxLevel; // PPM
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uint256 public demurrageModifier; // PPM
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bytes32[] redistributions; // uint40(participants) uint160(value) uint56(period)
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mapping (address => bytes32) account;
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mapping (address => bool) minter;
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event Transfer(address indexed _from, address indexed _to, uint256 _value);
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event Approval(address indexed _owner, address indexed _spender, uint256 _value);
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event Mint(address indexed _minter, address indexed _beneficiary, uint256 _amount);
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constructor(string memory _name, string memory _symbol, uint32 _taxLevel, uint256 _period) {
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owner = msg.sender;
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minter[owner] = true;
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periodStart = block.number;
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periodDuration = _period;
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taxLevel = _taxLevel;
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name = _name;
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symbol = _symbol;
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decimals = 6;
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demurrageModifier = 1000000;
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bytes32 initialRedistribution = toRedistribution(0, 1, 0);
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redistributions.push(initialRedistribution);
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}
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function addMinter(address _minter) public returns (bool) {
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require(msg.sender == owner);
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minter[_minter] = true;
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return true;
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}
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function balanceOf(address _account) public view returns (uint256) {
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uint256 baseBalance = getBaseBalance(_account);
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uint256 inverseModifier = 1000000 - demurrageModifier;
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uint256 balanceModifier = (inverseModifier * baseBalance) / 1000000;
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return baseBalance - balanceModifier;
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}
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function getBaseBalance(address _account) private view returns (uint256) {
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return uint256(account[_account]) & 0x00ffffffffffffffffffffffffffffffffffffffff;
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}
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function increaseBalance(address _account, uint256 _delta) private returns (bool) {
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uint256 oldBalance = getBaseBalance(_account);
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account[_account] &= bytes20(0x00);
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account[_account] |= bytes32((oldBalance + _delta) & 0x00ffffffffffffffffffffffffffffffffffffffff);
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return true;
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}
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function decreaseBalance(address _account, uint256 _delta) private returns (bool) {
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uint256 oldBalance = getBaseBalance(_account);
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account[_account] &= bytes20(0x00);
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account[_account] |= bytes32((oldBalance - _delta) & 0x00ffffffffffffffffffffffffffffffffffffffff);
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return true;
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}
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function mintTo(address _beneficiary, uint256 _amount) external returns (bool) {
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require(minter[msg.sender]);
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increaseBalance(_beneficiary, _amount);
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emit Mint(msg.sender, _beneficiary, _amount);
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return true;
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}
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function toRedistribution(uint256 _participants, uint256 _value, uint256 _period) private pure returns(bytes32) {
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bytes32 redistribution;
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redistribution |= bytes32((_participants & 0xffffffffff) << 215);
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@ -64,18 +108,31 @@ contract RedistributedDemurrageToken {
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function applyTax() public returns (uint256) {
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bytes32 pendingRedistribution;
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bytes32 nextRedistribution;
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uint256 currentPeriod;
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pendingRedistribution = checkPeriod();
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if (pendingRedistribution == bytes32(0x00)) {
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return demurrageModifier;
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}
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demurrageModifier += taxLevel;
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nextRedistribution = toRedistribution(0, actualPeriod(), 0);
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demurrageModifier -= (demurrageModifier * taxLevel) / 1000000;
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// this should increment for one single period at at time
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currentPeriod = toRedistributionPeriod(pendingRedistribution);
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nextRedistribution = toRedistribution(0, currentPeriod + 1, 0);
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redistributions.push(nextRedistribution);
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return demurrageModifier;
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}
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function noop() public returns (uint256) {
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return 0;
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function transfer(address _to, uint256 _value) public returns (bool ) {
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//&uint256 baseValue = (_value * 1000000) / demurrageModifier;
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uint256 baseValue = (_value * 1000000) / demurrageModifier;
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bool result = transferBase(_to, baseValue);
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emit Transfer(msg.sender, _to, _value);
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return result;
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}
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function transferBase(address _to, uint256 _value) private returns (bool) {
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decreaseBalance(msg.sender, _value);
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increaseBalance(_to, _value);
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return true;
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}
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}
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