{ "contractName": "AddressStringUtil", "abi": [], "bytecode": "0x604c602c600b82828239805160001a60731460008114601c57601e565bfe5b5030600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a72305820a135e34fc440e95d986df9dbd6b33fbb4c1a96e3046babe127b8458965b1841a0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a72305820a135e34fc440e95d986df9dbd6b33fbb4c1a96e3046babe127b8458965b1841a0029", "sourceMap": "28:1353:9:-;;132:2:-1;166:7;155:9;146:7;137:37;252:7;246:14;243:1;238:23;232:4;229:33;270:1;265:20;;;;222:63;;265:20;274:9;222:63;;298:9;295:1;288:20;328:4;319:7;311:22;352:7;343;336:24", "deployedSourceMap": "28:1353:9:-;;;;;;;;", "source": "pragma solidity >=0.5.0;\r\n\r\nlibrary AddressStringUtil {\r\n\r\n // converts an address to the uppercase hex string, extracting only len bytes (up to 20, multiple of 2)\r\n function toAsciiString(address addr, uint256 len) internal pure returns (string memory) {\r\n require(len % 2 == 0 && len > 0 && len <= 40, 'AddressStringUtil: INVALID_LEN');\r\n\r\n bytes memory s = new bytes(len);\r\n uint256 addrNum = uint256(addr);\r\n for (uint256 i = 0; i < len / 2; i++) {\r\n // shift right and truncate all but the least significant byte to extract the byte at position 19-i\r\n uint8 b = uint8(addrNum >> (8 * (19 - i)));\r\n // first hex character is the most significant 4 bits\r\n uint8 hi = b >> 4;\r\n // second hex character is the least significant 4 bits\r\n uint8 lo = b - (hi << 4);\r\n s[2 * i] = char(hi);\r\n s[2 * i + 1] = char(lo);\r\n }\r\n return string(s);\r\n }\r\n\r\n // hi and lo are only 4 bits and between 0 and 16\r\n // this method converts those values to the unicode/ascii code point for the hex representation\r\n // uses upper case for the characters\r\n function char(uint8 b) private pure returns (bytes1 c) {\r\n if (b < 10) {\r\n return bytes1(b + 0x30);\r\n } else {\r\n return bytes1(b + 0x37);\r\n }\r\n }\r\n}\r\n", 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