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"source": "pragma solidity ^0.4.24;\n\nimport './rsa.sol';\n\ncontract Signidice is RSA {\n\n /**\n @notice Generate random ranges\n @param _ranges ranges array\n @param _entropy entropy for generation\n */\n function generateRnd(uint[2][] _ranges, bytes _entropy) external pure returns(uint[]) {\n uint[] memory randoms = new uint[](_ranges.length);\n for (uint i = 0; i < _ranges.length; i++) {\n uint256[2] memory range = _ranges[i];\n \n uint256 min = range[0];\n uint256 max = range[1];\n uint256 delta = (max - min + 1);\n \n bytes32 lucky = keccak256(abi.encodePacked(_entropy, uint256(i)));\n \n while (uint256(lucky) >= (2**(256-1)/delta) * delta) {\n lucky = keccak256(abi.encodePacked(lucky));\n }\n\n uint256 result = (uint256(lucky) % (delta)) + min;\n randoms[i] = result;\n }\n return randoms;\n }\n\n} ", "sourcePath": "/Users/fanyshu/Documents/Projects/DCLabs/monorepo/packages/dc-sdk-example/dapp/contracts/signidice/Signidice.sol", "ast": { "absolutePath": 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