i0sXydZJ

1const nacl = require('tweetnacl')
2const https = require('https')
3
4function byteToHexString(uint8arr) {
5    if (!uint8arr) {
6        return '';
7    }
8
9    let hexStr = '';
10    const radix = 16;
11    const magicNumber = 0xff;
12    for (let i = 0; i < uint8arr.length; i++) {
13        let hex = (uint8arr[i] & magicNumber).toString(radix);
14        hex = (hex.length === 1) ? '0' + hex : hex;
15        hexStr += hex;
16    }
17
18    return hexStr;
19}
20
21function hexStringToByte(str) {
22    if (typeof str !== 'string') {
23        throw new TypeError('Wrong data type passed to convertor. Hexadecimal string is expected');
24    }
25    const twoNum = 2;
26    const radix = 16;
27    const uInt8arr = new Uint8Array(str.length / twoNum);
28    for (let i = 0, j = 0; i < str.length; i += twoNum, j++) {
29        uInt8arr[j] = parseInt(str.substr(i, twoNum), radix);
30    }
31    return uInt8arr;
32}
33
34function hex2ascii(hexx) {
35    const hex = hexx.toString();
36    let str = '';
37    for (let i = 0; (i < hex.length && hex.substr(i, 2) !== '00'); i += 2)
38        str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
39    return str;
40}
41
42// insert your api keys
43const publicKey = "c83bb63ddbeb01ce58a653f27be220cb630e6c9efe000e05fe4f5ffd97401595";
44const secretKey = "704c5ed365fb482edc462b7c3578083911c4477c5505f4762a09afcd94676777c83bb63ddbeb01ce58a653f27be220cb630e6c9efe000e05fe4f5ffd97401595";
45const host = 'api.dmarket.com';
46
47function getFirstOfferFromMarket() {
48    const requestOptions = {
49        host: host,
50        path: '/exchange/v1/market/items?gameId=a8db&limit=1&currency=USD',
51        method: 'GET',
52    };
53
54    // you can use a more high-level wrapper for requests instead of native https.request
55    // check https://github.com/axios/axios as an example
56    return new Promise(function(resolve, reject) {
57        const request = https.request(requestOptions, (response) => {
58            let body = [];
59            response.on('data', function(chunk) {
60                body.push(chunk);
61            });
62            // resolve on end
63            response.on('end', function() {
64                try {
65                    body = JSON.parse(Buffer.concat(body).toString());
66                } catch(e) {
67                    reject(e);
68                }
69                resolve(body['objects'][0]);
70            });
71        });
72        request.end();
73    });
74}
75
76function buildTargetBodyFromOffer(offer) {
77    return {
78        "targets": [
79            {
80                "amount": 1, "gameId": offer.gameId, "price": {"amount": "2", "currency": "USD"},
81                "attributes": {
82                    "gameId": offer.gameId, "categoryPath": offer.extra.categoryPath, "title": offer.title,
83                    "name": offer.title,
84                    "image": offer.image,
85                    "ownerGets": {"amount": "1", "currency": "USD"}
86                }
87            }]
88    }
89}
90
91function sign(string) {
92    const signatureBytes = nacl.sign(new TextEncoder('utf-8').encode(string), hexStringToByte(secretKey));
93    return byteToHexString(signatureBytes).substr(0,128);
94}
95
96function sendNewTargetRequest(requestOptions, targetRequestBody) {
97    const req = https.request(requestOptions, (response) => {
98        console.log('statusCode:', response.statusCode);
99        response.on('data', (responseBodyBytes) => {
100            console.log(hex2ascii(byteToHexString(responseBodyBytes)));
101        });
102    });
103
104    req.on('error', (e) => {
105        console.error(e);
106    });
107
108    req.write(targetRequestBody);
109    req.end();
110}
111
112async function buyItem(offerId, price) {
113    const method = "PATCH";
114    const apiUrlPath = "/exchange/v1/offers-buy";
115    const targetRequestBody = JSON.stringify({
116        "offers": [
117            {
118                "offerId": offerId,
119                "price": {
120                    "amount": price,
121                    "currency": "USD"
122                },
123                type: "dmarket"
124            }
125        ]
126    })
127    console.log(targetRequestBody);
128    const timestamp = Math.floor(new Date().getTime() / 1000);
129     const stringToSign = method + apiUrlPath + targetRequestBody + timestamp;
130    const signature = sign(stringToSign);
131    const requestOptions = {
132        host: host,
133        path: apiUrlPath,
134        method: method,
135        headers: {
136            "X-Api-Key": publicKey,
137            "X-Request-Sign": "dmar ed25519 " + signature,
138            "X-Sign-Date": timestamp,
139            'Content-Type': 'application/json',
140        }
141    };
142
143    sendNewTargetRequest(requestOptions, targetRequestBody);
144}
145
146async function getItems() {
147    const method = "GET";
148    const apiUrlPath = "/exchange/v1/user/items";
149    const targetRequestBody = JSON.stringify({
150        "gameId": "a8db",
151        "currency": "USD"
152    })
153    console.log(targetRequestBody);
154    const timestamp = Math.floor(new Date().getTime() / 1000);
155     const stringToSign = method + apiUrlPath + targetRequestBody + timestamp;
156    const signature = sign(stringToSign);
157    const requestOptions = {
158        host: host,
159        path: apiUrlPath,
160        method: method,
161        headers: {
162            "X-Api-Key": publicKey,
163            "X-Request-Sign": "dmar ed25519 " + signature,
164            "X-Sign-Date": timestamp,
165            'Content-Type': 'application/json',
166        }
167    };
168
169    sendNewTargetRequest(requestOptions, targetRequestBody);
170}
171
172
173BuyItem("f82a3a54-8145-4c6a-9b29-5f6cdd3ea43a", "1");
174
175//getItems()