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fix: pausable tidy #102

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merged 1 commit into from
Feb 21, 2023
Merged

fix: pausable tidy #102

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,7 @@ utils
├─ LibBit — "A library ported from solady for bit twiddling operations"
├─ MerkleProofLib — "Gas optimized merkle proof verification library"
├─ Multicallable — "Enables a single call to call multiple methods within a contract"
├─ Pausable — "An implementation of the Pausable standard"
├─ ReentrancyGuard — "Gas optimized reentrancy protection for smart contracts"
├─ Refunded — "Efficient gas refunds distributed through a modifier"
├─ SafeTransferLib — "Safe ETH and ERC20 transfer library that gracefully handles missing return values"
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40 changes: 19 additions & 21 deletions src/utils/Pausable.huff
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Expand Up @@ -24,50 +24,48 @@
#define event Unpaused(address)



// Storage

/// @notice Paused Storage Slot
#define constant PAUSED_SLOT = FREE_STORAGE_POINTER()

/// @notice Unpaused representation
#define constant _UNPAUSED = 0x01
#define constant NOT_PAUSED = 0x01

/// @notice Paused representation
#define constant _PAUSED = 0x02
#define constant PAUSED = 0x02


/// @notice Pausable constructor
#define macro PAUSABLE_CONSTRUCTOR() = takes (0) returns (0) {
[_UNPAUSED] [PAUSED_SLOT] sstore // []
[NOT_PAUSED] [PAUSED_SLOT] sstore // []
}

/// @notice whenNotPaused modifier
#define macro WHEN_NOT_PAUSED_MODIFIER() = takes (0) returns (0) {
[PAUSED_SLOT] sload // [isPaused]
[_UNPAUSED] eq when_not_paused jumpi // []
0x00 dup1 revert // []
when_not_paused: // []
[PAUSED_SLOT] sload // [isPaused]
[NOT_PAUSED] eq when_not_paused jumpi // []
0x00 dup1 revert // []
when_not_paused: // []
}

/// @notice whenPaused modifier
#define macro WHEN_PAUSED_MODIFIER() = takes (0) returns (0) {
[PAUSED_SLOT] sload // [isPaused]
[_PAUSED] eq when_paused jumpi // []
0x00 dup1 revert // []
when_paused: // []
}
[PAUSED_SLOT] sload // [isPaused]
[PAUSED] eq when_paused jumpi // []
0x00 dup1 revert // []
when_paused: // []
}

/// @notice return whether contract is paused
#define macro PAUSABLE_IS_PAUSED() = takes (0) returns (0) {
0x01 // [1]
[PAUSED_SLOT] sload // [isPaused, 1]
sub // [bool]
0x00 mstore // []
0x20 0x00 return // []
0x01 // [1]
[PAUSED_SLOT] sload // [isPaused, 1]
sub // [bool]
0x00 mstore // []
0x20 0x00 return // []
}


/// @notice Pause the contract
#define macro PAUSABLE_PAUSE() = takes (0) returns (0) {
WHEN_NOT_PAUSED_MODIFIER() // []
Expand All @@ -76,7 +74,7 @@
caller __EVENT_HASH(Paused) 0x00 dup1 // [0, 0, EVENT_PAUSED, msg.sender]
log2 // []

[_PAUSED] [PAUSED_SLOT] sstore // []
[PAUSED] [PAUSED_SLOT] sstore // []
stop
}

Expand All @@ -88,6 +86,6 @@
caller __EVENT_HASH(Unpaused) 0x00 dup1 // [0, 0, EVENT_UNPAUSED, msg.sender]
log2 // []

[_UNPAUSED] [PAUSED_SLOT] sstore // []
[NOT_PAUSED] [PAUSED_SLOT] sstore // []
stop
}