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2022-11-25 16:12:49 +00:00
parent 6db3408885
commit 8d69b7affd
6 changed files with 44 additions and 8 deletions
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12
contracts/utils/Checkpoints.sol
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@ -28,7 +28,8 @@ library Checkpoints {
/**
* @dev Returns the value at a given block number. If a checkpoint is not available at that block, the closest one
* before it is returned, or zero otherwise.
* before it is returned, or zero otherwise. Because the number returned corresponds to that at the end of the
* block, the requested block number must be in the past, excluding the current block.
*/
function getAtBlock(History storage self, uint256 blockNumber) internal view returns (uint256) {
require(blockNumber < block.number, "Checkpoints: block not yet mined");
@ -205,6 +206,9 @@ library Checkpoints {
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(Checkpoint[] storage self, uint256 pos) private pure returns (Checkpoint storage result) {
assembly {
mstore(0, self.slot)
@ -366,6 +370,9 @@ library Checkpoints {
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(Checkpoint224[] storage self, uint256 pos)
private
pure
@ -531,6 +538,9 @@ library Checkpoints {
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(Checkpoint160[] storage self, uint256 pos)
private
pure