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docs: explain arbOSVersion offset #245

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Sep 12, 2024
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3 changes: 2 additions & 1 deletion src/precompiles/ArbSys.sol
Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@ interface ArbSys {
function arbChainID() external view returns (uint256);

/**
* @notice Get internal version number identifying an ArbOS build
* @notice Get internal version number identifying an ArbOS build, this is `55 + nitroArbOS version number`
* e.g. on ArbOS 31 this would return 86. This is the only function that have the 55 offset.
* @return version number as int
*/
function arbOSVersion() external view returns (uint256);
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