cicnet/erc20-demurrage-token
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Add application of remainder

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This commit is contained in:
nolash 2021-02-05 12:32:17 +01:00
parent a3e7b54875
commit b04580cd97
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
1 changed files with 20 additions and 9 deletions
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27
solidity/RedistributedDemurrageToken.sol
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@ -16,7 +16,7 @@ contract RedistributedDemurrageToken {
uint256 public taxLevel; // PPM
uint256 public demurrageModifier; // PPM
bytes32[] public redistributions; // uint1(usedDustSink) | uint1(isFractional) | uint38(participants) | uint160(value) | uint56(period)
bytes32[] public redistributions; // uint1(isFractional) | uint1(unused) | uint38(participants) | uint160(value) | uint56(period)
mapping (address => bytes32) account; // uint20(unused) | uint56(period) | uint160(value)
mapping (address => bool) minter;
mapping (address => mapping (address => uint256 ) ) allowance; // holder -> spender -> amount (amount is subject to demurrage)
@ -107,7 +107,7 @@ contract RedistributedDemurrageToken {
function toRedistribution(uint256 _participants, uint256 _value, uint256 _period) private pure returns(bytes32) {
bytes32 redistribution;
redistribution |= bytes32((_participants & 0xffffffffff) << 216);
redistribution |= bytes32((_participants & 0x7fffffffff) << 216);
redistribution |= bytes32((_value & 0xffffffffffffffffffffffff) << 56);
redistribution |= bytes32(_period & 0xffffffffffffff);
return redistribution;
@ -125,7 +125,7 @@ contract RedistributedDemurrageToken {
// Serializes the number of participants part of the redistribution word
function toRedistributionParticipants(bytes32 redistribution) public pure returns (uint256) {
return uint256(redistribution & 0x3fffffffff000000000000000000000000000000000000000000000000000000) >> 216;
return uint256(redistribution & 0x7fffffffff000000000000000000000000000000000000000000000000000000) >> 216;
}
// Client accessor to the redistributions array length
@ -139,8 +139,8 @@ contract RedistributedDemurrageToken {
uint256 participants;
currentRedistribution = uint256(redistributions[redistributions.length-1]);
participants = ((currentRedistribution & 0xffffffffff000000000000000000000000000000000000000000000000000000) >> 216) + 1;
currentRedistribution &= 0x0000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff;
participants = ((currentRedistribution & 0x7fffffffff000000000000000000000000000000000000000000000000000000) >> 216) + 1;
currentRedistribution &= 0x8000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffff;
currentRedistribution |= participants << 216;
//emit Debug(participants);
@ -152,7 +152,7 @@ contract RedistributedDemurrageToken {
uint256 currentRedistribution;
currentRedistribution = uint256(redistributions[redistributions.length-1]);
currentRedistribution &= 0x3fffffffff0000000000000000000000000000000000000000ffffffffffffff;
currentRedistribution &= 0xffffffffff0000000000000000000000000000000000000000ffffffffffffff;
currentRedistribution |= totalSupply << 56;
redistributions[redistributions.length-1] = bytes32(currentRedistribution);
@ -204,7 +204,18 @@ contract RedistributedDemurrageToken {
return _sumWhole - truncatedResult;
}
function applyRemainder(uint256 remainder) public returns (bool) {
// sets the remainder bit for the given period and books the remainder to the sink address balance
// returns false if no change was made
function applyRemainderOnPeriod(uint256 _remainder, uint256 _period) private returns (bool) {
bytes32 redistribution;
redistribution = redistributions[_period-1];
if (_remainder == 0) {
return false;
}
redistribution |= 0x8000000000000000000000000000000000000000000000000000000000000000;
increaseBalance(sinkAddress, _remainder);
return true;
}
@ -228,7 +239,7 @@ contract RedistributedDemurrageToken {
currentParticipants = toRedistributionParticipants(currentRedistribution);
currentRemainder = remainder(currentParticipants, totalSupply); // we can use totalSupply directly because it will always be the same as the recorded supply on the current redistribution
applyRemainder(currentRemainder);
applyRemainderOnPeriod(currentRemainder, currentPeriod);
emit Taxed(currentPeriod, currentRemainder);
return demurrageModifier;
}