@trezor/utxo-lib/lib/coinselect/inputs/accumulative.js

Client-side Bitcoin-like JavaScript library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.accumulative = void 0;
const tslib_1 = require("tslib");
const bn_js_1 = tslib_1.__importDefault(require("bn.js"));
const coinselectUtils_1 = require("../coinselectUtils");
const accumulative = (utxos0, outputs, feeRate, options) => {
  let inAccum = coinselectUtils_1.ZERO;
  const inputs = [];
  const outAccum = (0, coinselectUtils_1.sumOrNaN)(outputs);
  const requiredUtxos = [];
  const utxos = [];
  utxos0.forEach(u => {
    if (u.required) {
      requiredUtxos.push(u);
      const utxoValue = (0, coinselectUtils_1.bignumberOrNaN)(u.value, true);
      inAccum = inAccum.add(utxoValue);
      inputs.push(u);
    } else {
      utxos.push(u);
    }
  });
  if (requiredUtxos.length > 0) {
    const requiredIsEnough = (0, coinselectUtils_1.finalize)(requiredUtxos, outputs, feeRate, options);
    if (requiredIsEnough.inputs) {
      return requiredIsEnough;
    }
  }
  for (let i = 0; i < utxos.length; ++i) {
    const utxo = utxos[i];
    const utxoBytes = (0, coinselectUtils_1.inputBytes)(utxo);
    const utxoFee = (0, coinselectUtils_1.getFeeForBytes)(feeRate, utxoBytes);
    const utxoValue = (0, coinselectUtils_1.bignumberOrNaN)(utxo.value);
    if (!utxoValue || utxoValue.lt(new bn_js_1.default(utxoFee))) {
      if (i === utxos.length - 1) {
        const fee = (0, coinselectUtils_1.getFee)([...inputs, utxo], outputs, feeRate, options);
        return {
          fee
        };
      }
    } else {
      inAccum = inAccum.add(utxoValue);
      inputs.push(utxo);
      const fee = (0, coinselectUtils_1.getFee)(inputs, outputs, feeRate, options);
      const outAccumWithFee = outAccum ? outAccum.add(new bn_js_1.default(fee)) : coinselectUtils_1.ZERO;
      if (inAccum.gte(outAccumWithFee)) {
        return (0, coinselectUtils_1.finalize)(inputs, outputs, feeRate, options);
      }
    }
  }
  const fee = (0, coinselectUtils_1.getFee)(inputs, outputs, feeRate, options);
  return {
    fee
  };
};
exports.accumulative = accumulative;
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