Polkadot Fees

1export const name = 'Polkadot Fees';
2export const version = '0.1.1';
3export const license = 'MIT';
4export const description = 'Fetches fee & price data from Subscan for Polkadot and other substrate-based chains';
5
6export function setup(sdk: Context) {
7  const getSubstrateData = async (id: string, date: string, divisor: number): Promise<number> => {
8    const followingDay = sdk.date.offsetDaysFormatted(date, 1);
9    const [fees, prices] = await Promise.all([
10      sdk.http.post(`https://${id}.api.subscan.io/api/scan/daily`, {
11        start: date,
12        end: date,
13        format: 'day',
14        category: 'Fee',
15      }),
16      sdk.http.post(`https://${id}.api.subscan.io/api/scan/price/history`, {
17        start: date,
18        end: followingDay,
19      }),
20    ]);
21
22    if (fees.data.list.length === 0 || prices.data.list.length === 0) {
23      throw new Error(`No substrate data found for ${id} on ${date}`);
24    }
25
26    return (fees.data.list[0].balance_amount_total * prices.data.list[0].price) / divisor;
27  }
28
29  sdk.register({
30    id: 'polkadot',
31    queries: {
32      oneDayTotalFees: (date: string) => getSubstrateData('polkadot', date, 10 ** 10),
33    },
34    metadata: {
35      name: 'Polkadot',
36      icon: sdk.ipfs.getDataURILoader('Qmc2A56wLVhqcxeKC3ueje88d9YhEBWgiNXAz32to8yu5g', 'image/svg+xml'),
37      category: 'l1',
38      description: 'Polkadot is a protocol for securing and connecting blockchains.',
39      feeDescription: 'Transaction fees are paid from users to validators.',
40      blockchain: 'Polkadot',
41      source: 'Subscan',
42      website: 'https://polkadot.network',
43      tokenTicker: 'DOT',
44      tokenCoingecko: 'polkadot',
45      protocolLaunch: '2020-07-25',
46      tokenLaunch: '2020-08-19',
47    },
48  });
49
50  sdk.register({
51    id: 'kusama',
52    queries: {
53      oneDayTotalFees: (date: string) => getSubstrateData('kusama', date, 10 ** 12),
54    },
55    metadata: {
56      name: 'Kusama',
57      icon: sdk.ipfs.getDataURILoader('QmQRkTqJpf4GgC86fiimKVMUVxWZixrgGzfw3J43wy3vrb', 'image/svg+xml'),
58      category: 'l1',
59      description: 'Kusama is the "canary chain for early-stage Polkadot development.',
60      feeDescription: 'Transaction fees are paid from users to validators.',
61      blockchain: 'Kusama',
62      source: 'Subscan',
63      website: 'https://kusama.network',
64      tokenTicker: 'KSM',
65      tokenCoingecko: 'kusama',
66      protocolLaunch: '2020-07-25',
67      tokenLaunch: '2020-09-20',
68      events: [
69        {
70          date: '2021-11-11',
71          description: 'First Parachain auction begins',
72        },
73        {
74          date: '2021-11-13',
75          description: 'First Parachain auction ends',
76        },
77      ],
78    },
79  });
80}
81