�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` /** * Base-N/Base-X encoding/decoding functions. * * Original implementation from base-x: * https://github.com/cryptocoinjs/base-x * * Which is MIT licensed: * * The MIT License (MIT) * * Copyright base-x contributors (c) 2016 * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ var api = {}; module.exports = api; // baseN alphabet indexes var _reverseAlphabets = {}; /** * BaseN-encodes a Uint8Array using the given alphabet. * * @param input the Uint8Array to encode. * @param maxline the maximum number of encoded characters per line to use, * defaults to none. * * @return the baseN-encoded output string. */ api.encode = function(input, alphabet, maxline) { if(typeof alphabet !== 'string') { throw new TypeError('"alphabet" must be a string.'); } if(maxline !== undefined && typeof maxline !== 'number') { throw new TypeError('"maxline" must be a number.'); } var output = ''; if(!(input instanceof Uint8Array)) { // assume forge byte buffer output = _encodeWithByteBuffer(input, alphabet); } else { var i = 0; var base = alphabet.length; var first = alphabet.charAt(0); var digits = [0]; for(i = 0; i < input.length; ++i) { for(var j = 0, carry = input[i]; j < digits.length; ++j) { carry += digits[j] << 8; digits[j] = carry % base; carry = (carry / base) | 0; } while(carry > 0) { digits.push(carry % base); carry = (carry / base) | 0; } } // deal with leading zeros for(i = 0; input[i] === 0 && i < input.length - 1; ++i) { output += first; } // convert digits to a string for(i = digits.length - 1; i >= 0; --i) { output += alphabet[digits[i]]; } } if(maxline) { var regex = new RegExp('.{1,' + maxline + '}', 'g'); output = output.match(regex).join('\r\n'); } return output; }; /** * Decodes a baseN-encoded (using the given alphabet) string to a * Uint8Array. * * @param input the baseN-encoded input string. * * @return the Uint8Array. */ api.decode = function(input, alphabet) { if(typeof input !== 'string') { throw new TypeError('"input" must be a string.'); } if(typeof alphabet !== 'string') { throw new TypeError('"alphabet" must be a string.'); } var table = _reverseAlphabets[alphabet]; if(!table) { // compute reverse alphabet table = _reverseAlphabets[alphabet] = []; for(var i = 0; i < alphabet.length; ++i) { table[alphabet.charCodeAt(i)] = i; } } // remove whitespace characters input = input.replace(/\s/g, ''); var base = alphabet.length; var first = alphabet.charAt(0); var bytes = [0]; for(var i = 0; i < input.length; i++) { var value = table[input.charCodeAt(i)]; if(value === undefined) { return; } for(var j = 0, carry = value; j < bytes.length; ++j) { carry += bytes[j] * base; bytes[j] = carry & 0xff; carry >>= 8; } while(carry > 0) { bytes.push(carry & 0xff); carry >>= 8; } } // deal with leading zeros for(var k = 0; input[k] === first && k < input.length - 1; ++k) { bytes.push(0); } if(typeof Buffer !== 'undefined') { return Buffer.from(bytes.reverse()); } return new Uint8Array(bytes.reverse()); }; function _encodeWithByteBuffer(input, alphabet) { var i = 0; var base = alphabet.length; var first = alphabet.charAt(0); var digits = [0]; for(i = 0; i < input.length(); ++i) { for(var j = 0, carry = input.at(i); j < digits.length; ++j) { carry += digits[j] << 8; digits[j] = carry % base; carry = (carry / base) | 0; } while(carry > 0) { digits.push(carry % base); carry = (carry / base) | 0; } } var output = ''; // deal with leading zeros for(i = 0; input.at(i) === 0 && i < input.length() - 1; ++i) { output += first; } // convert digits to a string for(i = digits.length - 1; i >= 0; --i) { output += alphabet[digits[i]]; } return output; }