@trezor/utxo-lib/lib/compose/sorting/randomSortingStrategy.js

Client-side Bitcoin-like JavaScript library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.randomSortingStrategy = void 0;
const utils_1 = require("@trezor/utils");
const convertOutput_1 = require("./convertOutput");
const randomSortingStrategy = ({
  result,
  request,
  convertedInputs
}) => {
  const nonChangeOutputPermutation = [];
  const changeOutputPermutation = [];
  const convertedOutputs = result.outputs.map((output, index) => {
    if (request.outputs[index]) {
      nonChangeOutputPermutation.push(index);
      return (0, convertOutput_1.convertOutput)(output, request.outputs[index]);
    }
    changeOutputPermutation.push(index);
    return (0, convertOutput_1.convertOutput)(output, {
      type: 'change',
      ...request.changeAddress
    });
  });
  const permutation = [...nonChangeOutputPermutation];
  const newPositionOfChange = (0, utils_1.getRandomInt)(0, permutation.length + 1);
  permutation.splice(newPositionOfChange, 0, ...changeOutputPermutation);
  const sortedOutputs = permutation.map(index => convertedOutputs[index]);
  return {
    inputs: (0, utils_1.arrayShuffle)(convertedInputs, {
      randomInt: utils_1.getRandomInt
    }),
    outputs: sortedOutputs,
    outputsPermutation: permutation
  };
};
exports.randomSortingStrategy = randomSortingStrategy;
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