@bithomp/xrpl-api/lib/models/book_offers.js

A Bithomp JavaScript/TypeScript library for interacting with the XRP Ledger

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.formatBidsAndAsks = formatBidsAndAsks;
const lodash_1 = __importDefault(require("lodash"));
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const orderbook_order_1 = require("../parse/ledger/orderbook-order");
function isSameIssue(a, b) {
    return a.currency === b.currency && a.issuer === b.issuer;
}
function directionFilter(direction, order) {
    return order.specification.direction === direction;
}
function flipOrder(order) {
    const specification = order.specification;
    const flippedSpecification = {
        quantity: specification.totalPrice,
        totalPrice: specification.quantity,
        direction: specification.direction === "buy" ? "sell" : "buy",
    };
    const newSpecification = lodash_1.default.merge({}, specification, flippedSpecification);
    return lodash_1.default.merge({}, order, { specification: newSpecification });
}
function alignOrder(base, order) {
    const quantity = order.specification.quantity;
    return isSameIssue(quantity, base) ? order : flipOrder(order);
}
function formatBidsAndAsks(orderbook, offers) {
    const orders = offers
        .sort((a, b) => {
        return new bignumber_js_1.default(a.quality).comparedTo(b.quality) ?? 0;
    })
        .map(orderbook_order_1.parseOrderbookOrder);
    const alignedOrders = orders.map(lodash_1.default.partial(alignOrder, orderbook.base));
    const bids = alignedOrders.filter(lodash_1.default.partial(directionFilter, "buy"));
    const asks = alignedOrders.filter(lodash_1.default.partial(directionFilter, "sell"));
    return { bids, asks };
}