@onekeyfe/coinselect
Version:
A transaction input selection module for bitcoin.
30 lines • 1.32 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.discovery = exports.countUnusedFromEnd = void 0;
const tslib_1 = require("tslib");
const derivation_1 = require("./derivation");
const DISCOVERY_LOOKOUT = 20;
const countUnusedFromEnd = (array, isUnused, lookout) => {
const boundary = array.length > lookout ? array.length - lookout : 0;
for (let i = array.length; i > boundary; --i) {
if (!isUnused(array[i - 1])) {
return array.length - i;
}
}
return array.length;
};
exports.countUnusedFromEnd = countUnusedFromEnd;
const discovery = (discover, xpub, type, network, lookout = DISCOVERY_LOOKOUT) => {
const discoverRecursive = (from, prev) => tslib_1.__awaiter(void 0, void 0, void 0, function* () {
const unused = (0, exports.countUnusedFromEnd)(prev, a => a.empty, lookout);
if (unused >= lookout)
return prev;
const moreCount = lookout - unused;
const addresses = (0, derivation_1.deriveAddresses)(xpub, type, from, moreCount, network);
const more = yield Promise.all(addresses.map(discover));
return discoverRecursive(from + moreCount, prev.concat(more));
});
return discoverRecursive(0, []);
};
exports.discovery = discovery;
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