@gnosis.pm/dex-contracts/build/esm/scripts/submit_solution.js

Contracts for dFusion multi-token batch auction exchange

import BN from "bn.js";
import { factory } from "../src/logging";
const log = factory.getLogger("scripts.submitSolution");
const BatchExchange = artifacts.require("BatchExchange");
const argv = require("yargs")
    .option("resultFile", {
    describe: "The path to the solver's solution file",
})
    .demand(["resultFile"])
    .help(false)
    .version(false).argv;
// Turns T00x to x
const tokenID = (t) => parseInt(t.slice(1));
module.exports = async (callback) => {
    try {
        const instance = await BatchExchange.deployed();
        const batchId = (await instance.getCurrentBatchId()).subn(1);
        const result = require(argv.resultFile);
        // Extract traded amounts
        const owners = [];
        const orderIds = [];
        const buyVolumes = [];
        result.orders.forEach((order) => {
            owners.push(order.accountID);
            orderIds.push(new BN(order.orderID));
            buyVolumes.push(new BN(order.execBuyAmount));
        });
        //Extract prices
        const prices = [];
        const tokenIdsForPrice = [];
        for (const token in result.prices) {
            const id = tokenID(token);
            if (id == 0) {
                continue;
            }
            prices.push(new BN(result.prices[token]));
            tokenIdsForPrice.push(id);
        }
        // Cannot be U256::max because the SC would otherwise overflow
        const objectiveValue = new BN(2).shln(248).subn(1);
        log.info(`Submitting solution for batch ${batchId} with args:
      objective: ${objectiveValue}
      owners: [${owners}]
      orderIds: [${orderIds}]
      buyVolumes: [${buyVolumes}]
      prices: [${prices}]
      tokenIdsForPrice: [${tokenIdsForPrice}]
    `);
        await instance.submitSolution(batchId, objectiveValue, owners, orderIds, buyVolumes, prices, tokenIdsForPrice);
    }
    catch (error) {
        callback(error);
    }
};