//kakarot/solidity_contracts/lib/kakarot-lib/src/CairoLib.sol
    function totalSupply() external view returns (uint256) {
        bytes memory returnData = starknetToken.staticcallCairo("total_supply");
|>      return abi.decode(returnData, (uint256));
    }
...
        (uint128 valueLow, uint128 valueHigh) = abi.decode(
            returnData,
            (uint128, uint128)
        );
        return uint256(valueLow) + (uint256(valueHigh) << 128);
