1605 lines
76 KiB
JSON
1605 lines
76 KiB
JSON
{
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"contractName": "Base64",
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"abi": [],
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"metadata": "{\"compiler\":{\"version\":\"0.8.19+commit.7dd6d404\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Provides a set of functions to operate with Base64 strings. _Available since v4.5._\",\"kind\":\"dev\",\"methods\":{},\"stateVariables\":{\"_TABLE\":{\"details\":\"Base64 Encoding/Decoding Table\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/utils/Base64.sol\":\"Base64\"},\"evmVersion\":\"paris\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/utils/Base64.sol\":{\"keccak256\":\"0x5f3461639fe20794cfb4db4a6d8477388a15b2e70a018043084b7c4bedfa8136\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://77e5309e2cc4cdc3395214edb0ff43ff5a5f7373f5a425383e540f6fab530f96\",\"dweb:/ipfs/QmTV8DZ9knJDa3b5NPBFQqjvTzodyZVjRUg5mx5A99JPLJ\"]}},\"version\":1}",
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"bytecode": "0x60566050600b82828239805160001a6073146043577f4e487b7100000000000000000000000000000000000000000000000000000000600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212207744a584dd8fe9d31aad2a217a1ff38234c3b1ab25144e315c6ce19377a893a764736f6c63430008130033",
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"deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea26469706673582212207744a584dd8fe9d31aad2a217a1ff38234c3b1ab25144e315c6ce19377a893a764736f6c63430008130033",
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"source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides a set of functions to operate with Base64 strings.\n *\n * _Available since v4.5._\n */\nlibrary Base64 {\n /**\n * @dev Base64 Encoding/Decoding Table\n */\n string internal constant _TABLE = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\";\n\n /**\n * @dev Converts a `bytes` to its Bytes64 `string` representation.\n */\n function encode(bytes memory data) internal pure returns (string memory) {\n /**\n * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence\n * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol\n */\n if (data.length == 0) return \"\";\n\n // Loads the table into memory\n string memory table = _TABLE;\n\n // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter\n // and split into 4 numbers of 6 bits.\n // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up\n // - `data.length + 2` -> Round up\n // - `/ 3` -> Number of 3-bytes chunks\n // - `4 *` -> 4 characters for each chunk\n string memory result = new string(4 * ((data.length + 2) / 3));\n\n /// @solidity memory-safe-assembly\n assembly {\n // Prepare the lookup table (skip the first \"length\" byte)\n let tablePtr := add(table, 1)\n\n // Prepare result pointer, jump over length\n let resultPtr := add(result, 32)\n\n // Run over the input, 3 bytes at a time\n for {\n let dataPtr := data\n let endPtr := add(data, mload(data))\n } lt(dataPtr, endPtr) {\n\n } {\n // Advance 3 bytes\n dataPtr := add(dataPtr, 3)\n let input := mload(dataPtr)\n\n // To write each character, shift the 3 bytes (18 bits) chunk\n // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)\n // and apply logical AND with 0x3F which is the number of\n // the previous character in the ASCII table prior to the Base64 Table\n // The result is then added to the table to get the character to write,\n // and finally write it in the result pointer but with a left shift\n // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits\n\n mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))\n resultPtr := add(resultPtr, 1) // Advance\n\n mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))\n resultPtr := add(resultPtr, 1) // Advance\n\n mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))\n resultPtr := add(resultPtr, 1) // Advance\n\n mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))\n resultPtr := add(resultPtr, 1) // Advance\n }\n\n // When data `bytes` is not exactly 3 bytes long\n // it is padded with `=` characters at the end\n switch mod(mload(data), 3)\n case 1 {\n mstore8(sub(resultPtr, 1), 0x3d)\n mstore8(sub(resultPtr, 2), 0x3d)\n }\n case 2 {\n mstore8(sub(resultPtr, 1), 0x3d)\n }\n }\n\n return result;\n }\n}\n",
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"sourcePath": "@openzeppelin/contracts/utils/Base64.sol",
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"ast": {
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"absolutePath": "@openzeppelin/contracts/utils/Base64.sol",
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"Base64": [
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1464
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