Compound Fees

1export const name = 'Compound Fees';
2export const version = '0.1.2';
3export const license = 'MIT';
4
5const sum = (a: number, b: number) => a + b;
6
7export function setup(sdk: Context) {
8  const getCompoundFees = async (date: string): Promise<number> => {
9    const startTimestamp = sdk.date.dateToTimestamp(date);
10    const endTimestamp = startTimestamp + 86400;
11
12    const assetJson = await sdk.http.get('https://api.compound.finance/api/v2/ctoken');
13
14    const interestByAsset: number[] = await Promise.all(
15      assetJson.cToken.map(
16        async (asset: any): Promise<number> => {
17          const json = await sdk.http.get(`https://api.compound.finance/api/v2/market_history/graph?asset=${asset.token_address}&min_block_timestamp=${startTimestamp}&max_block_timestamp=${endTimestamp}&num_buckets=1`);
18
19          if (json.total_borrows_history.length === 0) {
20            return 0;
21          }
22
23          const dailyInterest =
24            (json.total_borrows_history[0].total.value *
25              json.prices_usd[0].price.value *
26              json.borrow_rates[0].rate) /
27            365;
28
29          return dailyInterest || 0;
30        }
31      )
32    );
33
34    const oneDay = interestByAsset.reduce(sum, 0);
35
36    return oneDay;
37  }
38
39  sdk.register({
40    id: 'compound',
41    queries: {
42      oneDayTotalFees: getCompoundFees,
43    },
44    metadata: {
45      name: 'Compound',
46      icon: sdk.ipfs.getDataURILoader('QmZpZsg829EnBxE2MPZykZpAfsxyRsu6EuGbtfTkf2EFNj', 'image/svg+xml'),
47      category: 'lending',
48      description: 'Compound is an open borrowing & lending protocol.',
49      feeDescription: 'Interest fees are paid from borrowers to lenders.',
50      blockchain: 'Ethereum',
51      source: 'Compound API',
52      website: 'https://compound.finance',
53      tokenTicker: 'COMP',
54      tokenCoingecko: 'compound-governance-token',
55      tokenLaunch: '2020-06-22',
56    },
57  });
58}
59