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Sync delegatedStakeToPoolByOwner whenever _withdrawAndSyncDelegatorRewards is called

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This commit is contained in:
Amir Bandeali
2019-10-22 09:38:18 -07:00
parent 359b804001
commit e7dc7167d0
1 changed files with 11 additions and 17 deletions
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28
contracts/staking/contracts/src/staking_pools/MixinStakingPoolRewards.sol
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@@ -31,25 +31,13 @@ contract MixinStakingPoolRewards is
{
using LibSafeMath for uint256;
/// @dev Syncs rewards for a delegator. This includes transferring WETH
/// rewards to the delegator, and adding/removing
/// dependencies on cumulative rewards.
/// This is used by a delegator when they want to sync their rewards
/// without delegating/undelegating. It's effectively the same as
/// delegating zero stake.
/// @dev Withdraws the caller's WETH rewards that have accumulated
/// until the last epoch.
/// @param poolId Unique id of pool.
function withdrawDelegatorRewards(bytes32 poolId)
external
{
address member = msg.sender;
_withdrawAndSyncDelegatorRewards(
poolId,
member
);
_delegatedStakeToPoolByOwner[member][poolId] =
_loadCurrentBalance(_delegatedStakeToPoolByOwner[member][poolId]);
_withdrawAndSyncDelegatorRewards(poolId, msg.sender);
}
/// @dev Computes the reward balance in ETH of the operator of a pool.
@@ -105,8 +93,8 @@ contract MixinStakingPoolRewards is
);
}
/// @dev Syncs rewards for a delegator. This includes transferring rewards
/// withdrawing rewards and adding/removing dependencies on cumulative rewards.
/// @dev Syncs rewards for a delegator. This includes withdrawing rewards
/// rewards and adding/removing dependencies on cumulative rewards.
/// @param poolId Unique id of pool.
/// @param member of the pool.
function _withdrawAndSyncDelegatorRewards(
@@ -128,6 +116,12 @@ contract MixinStakingPoolRewards is
0
);
// Sync the delegated stake balance. This will ensure future calls of
// `_computeDelegatorReward` during this epoch will return 0,
// preventing a delegator from withdrawing more than once an epoch.
_delegatedStakeToPoolByOwner[member][poolId] =
_loadCurrentBalance(_delegatedStakeToPoolByOwner[member][poolId]);
// Withdraw non-0 balance
if (balance != 0) {
// Decrease the balance of the pool