@trezor/utxo-lib
Version:
Client-side Bitcoin-like JavaScript library
65 lines • 2.23 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.tryConfirmed = tryConfirmed;
const coinselectUtils_1 = require("./coinselectUtils");
function filterUtxos(utxos, minConfOwn, minConfOther) {
const usable = [];
const unusable = [];
for (let i = 0; i < utxos.length; i++) {
const utxo = utxos[i];
const isUsed = utxo.own
? utxo.confirmations >= minConfOwn
: utxo.confirmations >= minConfOther;
if (isUsed || utxo.required) {
usable.push(utxo);
}
else {
unusable.push(utxo);
}
}
return {
usable,
unusable,
};
}
function tryConfirmed(algorithm, options) {
const own = options.own || 1;
const other = options.other || 6;
const coinbase = options.coinbase || coinselectUtils_1.MINIMAL_COINBASE_CONFIRMATIONS;
return (utxosO, outputs, feeRate, optionsIn) => {
const utxos = (0, coinselectUtils_1.filterCoinbase)(utxosO, coinbase);
if (utxos.length === 0) {
return { fee: 0 };
}
const trials = [];
let i;
for (i = own; i > 0; i--) {
trials.push({ other, own: i });
}
for (i = other - 1; i > 0; i--) {
trials.push({ other: i, own: 1 });
}
trials.push({ other: 1, own: 0 });
trials.push({ other: 0, own: 0 });
let unusable = utxos;
let usable = [];
for (i = 0; i < trials.length; i++) {
const trial = trials[i];
const filterResult = filterUtxos(unusable, trial.own, trial.other);
if (filterResult.usable.length > 0) {
usable = usable.concat(filterResult.usable);
const unusableH = filterResult.unusable;
unusable = unusableH;
const result = algorithm(usable, outputs, feeRate, optionsIn);
if (result.inputs) {
return result;
}
if (unusable.length === 0) {
return result;
}
}
}
throw new Error('Unexpected unreturned result');
};
}
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