@cross-nft-marketplace/auction-house-nft-hooks/dist/fetcher/EnsReverseFetcher.js

Generic react hooks for fetching cross-nft-marketplace auctions, nfts, and data on arbitary 721s. Powers nft-components.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.reverseResolveEnsAddresses = void 0;
const tslib_1 = require("tslib");
const bytes = tslib_1.__importStar(require("@ethersproject/bytes"));
const address_1 = require("@ethersproject/address");
const FetchWithTimeout_1 = require("./FetchWithTimeout");
const urls_1 = require("../constants/urls");
const addresses_1 = require("../constants/addresses");
function parseHexNumber(hex) {
    return parseInt(bytes.hexStripZeros(`0x${hex}`), 16);
}
function processReturnData(result) {
    let pieces = [];
    for (let i = 2; i < result.length; i += 64) {
        pieces.push(result.substr(i, 64));
    }
    const numberEntries = parseHexNumber(pieces[1]);
    const addresses = [];
    const offsets = [];
    for (let i = 0; i < numberEntries; i++) {
        offsets.push(parseHexNumber(pieces[i + 2]));
    }
    for (let i = 0; i < numberEntries; i++) {
        let pieceId = offsets[i] / 32 + 2;
        let strLen = parseHexNumber(pieces[pieceId]);
        const strHex = result.substr((pieceId + 1) * 64 + 2, strLen * 2);
        addresses.push(Buffer.from(strHex, 'hex').toString());
    }
    return addresses;
}
async function reverseResolveEnsAddresses(addresses, networkId, timeout) {
    if (!addresses_1.ENS_REVERSE_LOOKUP_CONTRACT_BY_NETWORK[networkId]) {
        throw new Error('Undefined ENS lookup for network');
    }
    const mapping = addresses.reduce((last, at) => {
        if (!address_1.isAddress(at)) {
            return last;
        }
        last[at] = at;
        return last;
    }, {});
    const mappingKeys = Object.keys(mapping);
    const requestData = bytes.hexConcat([
        '0xcbf8b66c',
        bytes.hexConcat(['0x20', bytes.arrayify(mappingKeys.length), ...mappingKeys].map((el) => bytes.zeroPad(el, 32))),
    ]);
    const requestOptions = {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            jsonrpc: '2.0',
            id: '1',
            method: 'eth_call',
            params: [
                { to: addresses_1.ENS_REVERSE_LOOKUP_CONTRACT_BY_NETWORK[networkId], data: requestData },
                'latest',
            ],
        }),
    };
    const fetcher = new FetchWithTimeout_1.FetchWithTimeout(timeout, 'application/json');
    const result = await fetcher.fetch(urls_1.RPC_URL_BY_NETWORK[networkId], requestOptions); //todo use infura or FallbackProvider
    const json = await result.json();
    const resultAddresses = processReturnData(json.result);
    if (resultAddresses.length !== mappingKeys.length) {
        throw new Error('Wrong address return length');
    }
    return mappingKeys.reduce((last, at, index) => {
        last[at] = resultAddresses[index];
        return last;
    }, {});
}
exports.reverseResolveEnsAddresses = reverseResolveEnsAddresses;