Lido

1export const name = 'Lido';
2export const version = '0.1.1';
3export const license = 'MIT';
4
5const STETH_ADDRESS = '0xae7ab96520de3a18e5e111b5eaab095312d7fe84';
6
7const STETH_ABI = [
8  'function getPooledEthByShares(uint256 shares) external view returns (uint256 pooledEth)',
9  'function getBeaconStat() external view returns (uint256, uint256, uint256)',
10];
11
12const ONE_SHARE = '1000000000000000000';
13
14export function setup(sdk: Context) {
15  const getTotalStaked = async () => {
16    const stethContract = sdk.ethers.getContract(STETH_ADDRESS, STETH_ABI);
17
18    const beaconStats = await stethContract.getBeaconStat();
19    const numValidators = beaconStats[0].toString();
20
21    return numValidators * 32;
22  };
23
24  const getAPR = async () => {
25    const stethContract = sdk.ethers.getContract(STETH_ADDRESS, STETH_ABI);
26
27    const today = sdk.date.formatDate(new Date());
28    const weekAgo = sdk.date.offsetDaysFormatted(today, -7);
29
30    const totalRewardsNow = await stethContract.getPooledEthByShares(ONE_SHARE, { blockTag: today });
31    const totalRewardsWeekAgo = await stethContract.getPooledEthByShares(ONE_SHARE, { blockTag: weekAgo });
32
33    const rewardDiff = totalRewardsNow.toString() - totalRewardsWeekAgo.toString()
34
35    return rewardDiff / 1e18 * 52;
36  };
37
38  sdk.register({
39    id: 'lido',
40    queries: {
41      totalStakedETH: getTotalStaked,
42      apy: getAPR,
43    },
44    metadata: {
45      name: 'Lido',
46      icon: sdk.ipfs.getDataURILoader('QmcsGcopqrVyzTLXETtecJuhqxqxbzUvuFMqBd27yFKCMt', 'image/svg+xml'),
47    },
48  })
49}
50