Compact words, add demurragemodifier to redistribution word
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nolash
parent
0f816ebdc5
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2ad59df9c9
GPG Key ID:
21D2E7BB88C2A746
@ -84,14 +84,14 @@ class Test(unittest.TestCase):
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self.eth_tester.time_travel(self.start_time + 61)
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redistribution = self.contract.functions.redistributions(0).call();
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self.assertEqual(redistribution.hex(), '000000000100000000000000000000000000000000001e848000000000000001')
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self.assertEqual(redistribution.hex(), '000000000000000000000000f42400000000010000000000001e848000000001')
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[0], 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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redistribution = self.contract.functions.redistributions(1).call()
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self.assertEqual(redistribution.hex(), '000000000000000000000000000000000000000000002dc6c000000000000002')
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self.assertEqual(redistribution.hex(), '000000000000000000000000ef4200000000000000000000002dc6c000000002')
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def test_redistribution_balance_on_zero_participants(self):
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@ -18,8 +18,10 @@ contract RedistributedDemurrageToken {
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uint256 public immutable taxLevel; // PPM per MINUTE
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uint256 public demurrageModifier; // PPM uint128(block) | uint128(ppm)
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bytes32[] public redistributions; // uint1(isFractional) | uint1(unused) | uint38(participants) | uint160(value) | uint56(period)
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mapping (address => bytes32) account; // uint20(unused) | uint56(period) | uint160(value)
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//bytes32[] public redistributions; // uint1(isFractional) | uint1(unused) | uint38(participants) | uint160(value) | uint56(period)
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bytes32[] public redistributions; // uint1(isFractional) | uint95(unused) | uint20(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
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//mapping (address => bytes32) account; // uint20(unused) | uint56(period) | uint160(value)
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mapping (address => bytes32) account; // uint152(unused) | uint32(period) | uint72(value)
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mapping (address => bool) minter;
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mapping (address => mapping (address => uint256 ) ) allowance; // holder -> spender -> amount (amount is subject to demurrage)
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@ -44,7 +46,7 @@ contract RedistributedDemurrageToken {
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demurrageModifier |= (1 << 128);
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taxLevel = _taxLevelMinute; // 38 decimal places
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sinkAddress = _defaultSinkAddress;
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bytes32 initialRedistribution = toRedistribution(0, 0, 1);
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bytes32 initialRedistribution = toRedistribution(0, 1000000, 0, 1);
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redistributions.push(initialRedistribution);
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minimumParticipantSpend = 10 ** uint256(_decimals);
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}
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@ -77,13 +79,17 @@ contract RedistributedDemurrageToken {
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/// Balance unmodified by demurrage
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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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//return uint256(account[_account]) & 0x00ffffffffffffffffffffffffffffffffffffffff;
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return uint256(account[_account]) & 0xffffffffffffffffff;
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}
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/// Increases base balance for a single account
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function increaseBaseBalance(address _account, uint256 _delta) private returns (bool) {
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uint256 oldBalance;
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uint256 newBalance;
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uint256 workAccount;
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workAccount = uint256(account[_account]); // | (newBalance & 0xffffffffffffffffff);
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if (_delta == 0) {
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return false;
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@ -92,8 +98,12 @@ contract RedistributedDemurrageToken {
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oldBalance = getBaseBalance(_account);
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newBalance = oldBalance + _delta;
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require(uint160(newBalance) > uint160(oldBalance), 'ERR_WOULDWRAP'); // revert if increase would result in a wrapped value
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account[_account] &= bytes32(0xffffffffffffffffffffffff0000000000000000000000000000000000000000);
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account[_account] |= bytes32(newBalance & 0x00ffffffffffffffffffffffffffffffffffffffff);
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//account[_account] &= bytes32(0xfffffffffffffffffffffff0000000000000000000000000000000000000000);
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//account[_account] = bytes32(uint256(account[_account]) & 0xfffffffffffffffffffffffffffffffffffffffffffff000000000000000000);
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workAccount &= 0xfffffffffffffffffffffffffffffffffffffffffffff000000000000000000;
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//account[_account] |= bytes32(newBalance & 0x00ffffffffffffffffffffffffffffffffffffffff);
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workAccount |= newBalance & 0xffffffffffffffffff;
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account[_account] = bytes32(workAccount);
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return true;
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}
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@ -101,6 +111,9 @@ contract RedistributedDemurrageToken {
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function decreaseBaseBalance(address _account, uint256 _delta) private returns (bool) {
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uint256 oldBalance;
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uint256 newBalance;
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uint256 workAccount;
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workAccount = uint256(account[_account]); // | (newBalance & 0xffffffffffffffffff);
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if (_delta == 0) {
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return false;
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@ -109,8 +122,11 @@ contract RedistributedDemurrageToken {
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oldBalance = getBaseBalance(_account);
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require(oldBalance >= _delta, 'ERR_OVERSPEND'); // overspend guard
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newBalance = oldBalance - _delta;
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account[_account] &= bytes32(0xffffffffffffffffffffffff0000000000000000000000000000000000000000);
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account[_account] |= bytes32(newBalance & 0x00ffffffffffffffffffffffffffffffffffffffff);
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//account[_account] &= bytes32(0xffffffffffffffffffffffff0000000000000000000000000000000000000000);
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workAccount &= 0xfffffffffffffffffffffffffffffffffffffffffffff000000000000000000;
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//account[_account] |= bytes32(newBalance & 0x00ffffffffffffffffffffffffffffffffffffffff);
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workAccount |= newBalance & 0xffffffffffffffffff;
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account[_account] = bytes32(workAccount);
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return true;
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}
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@ -132,28 +148,35 @@ contract RedistributedDemurrageToken {
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}
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// Deserializes the redistribution word
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function toRedistribution(uint256 _participants, uint256 _value, uint256 _period) private pure returns(bytes32) {
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// uint1(isFractional) | uint95(unused) | uint20(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
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function toRedistribution(uint256 _participants, uint256 _demurrageModifierPpm, uint256 _value, uint256 _period) private pure returns(bytes32) {
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bytes32 redistribution;
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redistribution |= bytes32((_participants & 0x7fffffffff) << 216);
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redistribution |= bytes32((_value & 0xffffffffffffffffffffffff) << 56);
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redistribution |= bytes32(_period & 0xffffffffffffff);
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redistribution |= bytes32((_demurrageModifierPpm & 0x0fffff) << 140);
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redistribution |= bytes32((_participants & 0x0fffffffff) << 104);
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redistribution |= bytes32((_value & 0xffffffffffffffffff) << 32);
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redistribution |= bytes32(_period & 0xffffffff);
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return redistribution;
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}
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// Serializes the demurrage period part of the redistribution word
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function toRedistributionPeriod(bytes32 redistribution) public pure returns (uint256) {
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return uint256(redistribution & 0x00000000000000000000000000000000000000000000000000ffffffffffffff);
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return uint256(redistribution) & 0xffffffff;
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}
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// Serializes the supply part of the redistribution word
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function toRedistributionSupply(bytes32 redistribution) public pure returns (uint256) {
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return uint256(redistribution & 0x0000000000ffffffffffffffffffffffffffffffffffffffff00000000000000) >> 56;
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return uint256(redistribution & 0x00000000000000000000000000000000000000ffffffffffffffffff00000000) >> 32;
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}
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// Serializes the number of participants part of the redistribution word
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function toRedistributionParticipants(bytes32 redistribution) public pure returns (uint256) {
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return uint256(redistribution & 0x7fffffffff000000000000000000000000000000000000000000000000000000) >> 216;
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return uint256(redistribution & 0x00000000000000000000000000000fffffffff00000000000000000000000000) >> 104;
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}
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// Serializes the number of participants part of the redistribution word
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function toRedistributionDemurrageModifier(bytes32 redistribution) public pure returns (uint256) {
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return uint256(redistribution & 0x000000000000000000000000fffff00000000000000000000000000000000000) >> 140;
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}
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// Client accessor to the redistributions array length
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@ -163,16 +186,17 @@ contract RedistributedDemurrageToken {
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// Add number of participants for the current redistribution period by one
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function incrementRedistributionParticipants() private returns (bool) {
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uint256 currentRedistribution;
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bytes32 currentRedistribution;
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uint256 tmpRedistribution;
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uint256 participants;
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currentRedistribution = uint256(redistributions[redistributions.length-1]);
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participants = ((currentRedistribution & 0x7fffffffff000000000000000000000000000000000000000000000000000000) >> 216) + 1;
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currentRedistribution &= 0x8000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff;
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currentRedistribution |= participants << 216;
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currentRedistribution = redistributions[redistributions.length-1];
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participants = toRedistributionParticipants(currentRedistribution) + 1;
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tmpRedistribution = uint256(currentRedistribution);
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tmpRedistribution &= 0xfffffffffffffffffffffffffffff000000000ffffffffffffffffffffffffff;
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tmpRedistribution |= (participants & 0x0fffffffff) << 104;
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//emit Debug(participants);
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redistributions[redistributions.length-1] = bytes32(currentRedistribution);
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redistributions[redistributions.length-1] = bytes32(tmpRedistribution);
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}
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// Save the current total supply amount to the current redistribution period
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@ -180,8 +204,8 @@ contract RedistributedDemurrageToken {
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uint256 currentRedistribution;
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currentRedistribution = uint256(redistributions[redistributions.length-1]);
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currentRedistribution &= 0xffffffffff0000000000000000000000000000000000000000ffffffffffffff;
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currentRedistribution |= totalSupply << 56;
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currentRedistribution &= 0xffffffffffffffffffffffffffffffffffffff000000000000000000ffffffff;
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currentRedistribution |= totalSupply << 32;
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redistributions[redistributions.length-1] = bytes32(currentRedistribution);
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}
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@ -206,13 +230,15 @@ contract RedistributedDemurrageToken {
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// Deserialize the pemurrage period for the given account is participating in
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function accountPeriod(address _account) public view returns (uint256) {
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return (uint256(account[_account]) & 0xffffffffffffffffffffffff0000000000000000000000000000000000000000) >> 160;
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//return (uint256(account[_account]) & 0xffffffffffffffffffffffff0000000000000000000000000000000000000000) >> 160;
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return (uint256(account[_account]) & 0x00000000000000000000000000000000000000ffffffff000000000000000000) >> 72;
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}
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// Save the given demurrage period as the currently participation period for the given address
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function registerAccountPeriod(address _account, uint256 _period) private returns (bool) {
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account[_account] &= 0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff;
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account[_account] |= bytes32(_period << 160);
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//account[_account] &= 0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff;
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account[_account] &= 0xffffffffffffffffffffffffffffffffffffff00000000ffffffffffffffffff;
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account[_account] |= bytes32(_period << 72);
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incrementRedistributionParticipants();
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}
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@ -248,8 +274,10 @@ contract RedistributedDemurrageToken {
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if (truncatedResult < redistributionSupply) {
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redistributionPeriod = toRedistributionPeriod(_redistribution); // since we reuse period here, can possibly be optimized by passing period instead
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redistributions[redistributionPeriod-1] &= 0x0000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff; // just to be safe, zero out all participant count data, in this case there will be only one
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redistributions[redistributionPeriod-1] |= 0x8000000001000000000000000000000000000000000000000000000000000000;
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//redistributions[redistributionPeriod-1] &= 0x0000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff; // just to be safe, zero out all participant count data, in this case there will be only one
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redistributions[redistributionPeriod-1] &= 0xfffffffffffffffffffffffffffff000000000ffffffffffffffffffffffffff; // just to be safe, zero out all participant count data, in this case there will be only one
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//redistributions[redistributionPeriod-1] |= 0x8000000001000000000000000000000000000000000000000000000000000000;
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redistributions[redistributionPeriod-1] |= 0x8000000000000000000000000000000000000100000000000000000000000000;
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}
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increaseBaseBalance(sinkAddress, unit / ppmDivider); //truncatedResult);
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@ -265,6 +293,7 @@ contract RedistributedDemurrageToken {
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return false;
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}
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// is this needed?
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redistributions[_period-1] |= 0x8000000000000000000000000000000000000000000000000000000000000000;
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periodSupply = toRedistributionSupply(redistributions[_period-1]);
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@ -302,23 +331,39 @@ contract RedistributedDemurrageToken {
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return true;
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}
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// Return timestamp of start of period threshold
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function getPeriodTimeDelta(uint256 _periodCount) public view returns (uint256) {
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return periodStart + (_periodCount * periodDuration);
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}
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// Amount of demurrage cycles inbetween the current timestamp and the given target time
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function demurrageCycles(uint256 _target) public view returns (uint256) {
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return (block.timestamp - _target) / 60;
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}
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// Recalculate the demurrage modifier for the new period
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// After this, all REPORTED balances will have been reduced by the corresponding ratio (but the effecive totalsupply stays the same)
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//function applyTax() public returns (uint256) {
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function changePeriod() public returns (uint256) {
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function changePeriod() public returns (bool) {
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bytes32 currentRedistribution;
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bytes32 nextRedistribution;
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uint256 currentPeriod;
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uint256 currentParticipants;
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uint256 currentRemainder;
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uint256 currentRedistributionDemurrage;
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uint256 demurrageCounts;
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uint256 periodTimestamp;
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currentRedistribution = checkPeriod();
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if (currentRedistribution == bytes32(0x00)) {
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return demurrageModifier;
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return false;
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}
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//demurrageModifier -= (demurrageModifier * taxLevel) / 1000000;
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periodTimestamp = getPeriodTimeDelta(currentPeriod);
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demurrageCounts = demurrageCycles(periodTimestamp);
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currentRedistributionDemurrage = toRedistributionDemurrageModifier(currentRedistribution);
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currentPeriod = toRedistributionPeriod(currentRedistribution);
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nextRedistribution = toRedistribution(0, totalSupply, currentPeriod + 1);
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nextRedistribution = toRedistribution(0, toTaxPeriodAmount(currentRedistributionDemurrage, demurrageCounts), totalSupply, currentPeriod + 1);
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redistributions.push(nextRedistribution);
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currentParticipants = toRedistributionParticipants(currentRedistribution);
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@ -328,10 +373,11 @@ contract RedistributedDemurrageToken {
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currentRemainder = remainder(currentParticipants, totalSupply); // we can use totalSupply directly because it will always be the same as the recorded supply on the current redistribution
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applyRemainderOnPeriod(currentRemainder, currentPeriod);
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}
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return demurrageModifier;
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return true;
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}
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// Calculate a value reduced by demurrage by the given period
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// TODO: higher precision
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function toTaxPeriodAmount(uint256 _value, uint256 _period) public view returns (uint256) {
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uint256 valueFactor;
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uint256 truncatedTaxLevel;
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@ -370,7 +416,8 @@ contract RedistributedDemurrageToken {
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baseValue = ((supply / participants) * (taxLevel / 1000000)) / ppmDivider;
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value = toTaxPeriodAmount(baseValue, period - 1);
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account[_account] &= bytes32(0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff);
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//account[_account] &= bytes32(0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff);
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account[_account] &= bytes32(0xffffffffffffffffffffffffffffffffffffff00000000ffffffffffffffffff);
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increaseBaseBalance(_account, value);
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emit Redistribution(_account, period, value);
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