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Max at available balance in previewRewards #413

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merged 3 commits into from
May 8, 2024
Merged

Max at available balance in previewRewards #413

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9b985c7
Check available balance in `previewRewards`
shahthepro May 2, 2024
ada8a9f
Merge branch 'shah/ogn-rewards-source' into shah/fix-preview-rewards
DanielVF May 8, 2024
454af8d
Chore: forge fmt
DanielVF May 8, 2024
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10 changes: 8 additions & 2 deletions contracts/FixedRateRewardsSource.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -87,12 +87,18 @@ contract FixedRateRewardsSource is Governable, Initializable {

/// @dev Compute pending rewards since last collect
/// @return rewardAmount Amount of reward that'll be distributed if collected now
function previewRewards() public view returns (uint256) {
function previewRewards() public view returns (uint256 rewardAmount) {
RewardConfig memory _config = rewardConfig;

if (_config.lastCollect == 0) {
return 0;
}
return (block.timestamp - _config.lastCollect) * _config.rewardsPerSecond;

rewardAmount = (block.timestamp - _config.lastCollect) * _config.rewardsPerSecond;
uint256 balance = IERC20(rewardToken).balanceOf(address(this));
if (rewardAmount > balance) {
rewardAmount = balance;
}
}

/// @dev Set address of the strategist
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12 changes: 12 additions & 0 deletions tests/staking/FixedRateRewardsSource.t.sol
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Expand Up @@ -100,6 +100,18 @@ contract FixedRateRewardsSourceTest is Test {
assertEq(rewards.previewRewards(), 0 ether, "Pending reward mismatch");
}

function testLowBalanceCollection() public {
// Should also allow disabling rewards
vm.prank(strategist);
rewards.setRewardsPerSecond(2000000 ether);

// Should never show more than balance
vm.warp(block.number + 10);
assertEq(rewards.previewRewards(), 1000000 ether, "Pending reward mismatch");
vm.warp(block.number + 123);
assertEq(rewards.previewRewards(), 1000000 ether, "Pending reward mismatch");
}

function testRewardRatePermission() public {
// Should allow Strategist to change
vm.prank(strategist);
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