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// Based on http://base91.sourceforge.net/
const lookup: string[] = [];const revLookup: number[] = [];const code =  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%&()*+,./:;<=>?@[]^_`{|}~"';
for (let i = 0, len = code.length; i < len; ++i) {  lookup[i] = code[i];  revLookup[code.charCodeAt(i)] = i;}/** * Converts given data with base91 encoding * @param uint8 input to encode */export function encode(uint8: Uint8Array): string {  let output = "";  let queue = 0,    numbits = 0,    value = 0;  for (let i = 0, len = uint8.length; i < len; i++) {    queue |= uint8[i] << numbits;    numbits += 8;    if (numbits > 13) {      value = queue & 8191;      if (value > 88) {        queue >>= 13;        numbits -= 13;      } else {        value = queue & 16383;        queue >>= 14;        numbits -= 14;      }      output += lookup[value % 91] + lookup[Math.trunc(value / 91)];    }  }  if (numbits > 0) {    output += lookup[queue % 91];    if (numbits > 7 || queue > 90) {      output += lookup[Math.trunc(queue / 91)];    }  }  return output;}/** * Converts given base91 encoded data back to original Uint8Array * @param b91 input to decode */export function decode(b91: string): Uint8Array {  const output: number[] = [];  let queue = 0,    numbits = 0,    value = -1,    d = 0;  for (let i = 0, len = b91.length; i < len; i++) {    d = revLookup[b91.charCodeAt(i)];    if (d === undefined) continue;    if (value == -1) {      value = d;    } else {      value += d * 91;      queue |= value << numbits;      numbits += (value & 8191) > 88 ? 13 : 14;      do {        output.push(queue);        queue >>= 8;        numbits -= 8;      } while (numbits > 7);      value = -1;    }  }  if (value != -1) {    output.push(queue | (value << numbits));  }  return new Uint8Array(output);}