MakerDAO

1export const name = 'MakerDAO';
2export const version = '0.1.0';
3export const license = 'MIT';
4
5export function setup(sdk: Context) {
6  const getFees = async (startDate: string, endDate: string): Promise<number> => {
7    const startBlock = await sdk.chainData.getBlockNumber(startDate);
8    const endBlock = await sdk.chainData.getBlockNumber(endDate);
9
10    const data = await sdk.graph.query(
11      'protofire/maker-protocol',
12      `query fees($startBlock: Int!, $endBlock: Int!){
13        start: collateralTypes(block: {number: $startBlock}) {
14          id
15          totalDebt
16          stabilityFee
17        }
18        end: collateralTypes(block: {number: $endBlock}) {
19          id
20          totalDebt
21          stabilityFee
22        }
23      }`,
24      {
25        variables: {
26          startBlock,
27          endBlock,
28        }
29      },
30    );
31    const startDebts: any = {};
32
33    for (const collateral of data.end) {
34      startDebts[collateral.id] = parseFloat(collateral.totalDebt);
35    }
36    let totalFees = 0;
37    for (const collateral of data.start) {
38      if (startDebts[collateral.id]) {
39        const secondsBetweenDates = sdk.date.dateToTimestamp(endDate) - sdk.date.dateToTimestamp(startDate);
40        const feesInDay = Math.pow(collateral.stabilityFee, secondsBetweenDates) - 1;
41        const avgDebt = (startDebts[collateral.id] + parseFloat(collateral.totalDebt)) * 0.5;
42        totalFees += avgDebt * feesInDay;
43      }
44    }
45
46    return totalFees;
47  }
48
49  const getOneDayFees = (date: string) => {
50    const nextDay = sdk.date.offsetDaysFormatted(date, 1);
51    return getFees(date, nextDay);
52  }
53
54  sdk.register({
55    id: 'maker',
56    queries: {
57      oneDayTotalFees: getOneDayFees,
58      oneDayProtocolFees: getOneDayFees,
59      dateRangeTotalFees: getFees,
60      dateRangeProtocolFees: getFees,
61    },
62    metadata: {
63      name: 'MakerDAO',
64      icon: sdk.ipfs.getDataURILoader('QmNuxELX7oWXJtJKveaCFDC7niZ4APtkWgPn1NZm2FLSJV', 'image/svg+xml'),
65      protocolLaunch: '2019-11-15',
66      category: 'lending',
67      description: 'MakerDAO is the protocol that issues the Dai stablecoin using loans.',
68      feeDescription: 'Stability fees are accrued by borrowers and are used to buy & burn MKR.',
69      blockchain: 'Ethereum',
70      source: 'The Graph Protocol',
71      tokenTicker: 'MKR',
72      tokenCoingecko: 'maker',
73    },
74  })
75}