get-block-timestamp.md

getBlockTimestamp

Signature

function getBlockTimestamp() external view returns (uint256 timestamp);

Description

Gets the current block.timestamp. This is useful in cases where vm.warp along with --via-ir compilation is used, as block.timestamp is assumed to be a constant during a transaction. This means that on every forge test, multiple calls to block.timestamp would get optimized to just returning a constant value, instead of actually accessing the current block.timestamp. vm.getBlockTimestamp() avoids this optimization and returns the current block.timestamp.

Examples

assertEq(vm.getBlockTimestamp(), 1, "timestamp should be 1");
vm.warp(10);
assertEq(vm.getBlockTimestamp(), 10, "warp failed");