Track Pool Rewards

Learn how to track rewards accrued from Compound or Aave V2 through Morpho, onchain via a smart contract & offchain via ethers.js.

Anyone can, at anytime, query Morpho's Lens to get information about the rewards from Compound or Aave V2 accrued with a position on Morpho. Here are concrete examples 👇

Morpho Aave Optimizer Instances

There are currently no rewards distributed by Aave V2, or Aave V3.

Morpho CompoundV2 Optimizer

Solidity

// SPDX-License-Identifier: GNU AGPLv3
pragma solidity ^0.8.16;

import {ILens} from "@morpho-org/morpho-optimizers/contracts/compound/interfaces/ILens.sol";

contract MorphoCompoundSupplier {
    address public constant CWBTC = 0xC11b1268C1A384e55C48c2391d8d480264A3A7F4;

    address public constant LENS = 0x930f1b46e1D081Ec1524efD95752bE3eCe51EF67;

    function getUnclaimedComp() external view returns (uint256) {
        address[] memory markets = new address[](1);
        markets[0] = CDAI; // the DAI market, represented by the cDAI ERC20 token

        return
            ILens(LENS).getUserUnclaimedRewards(
                markets, // the markets to query unclaimed COMP rewards on
                address(this) // the address of the user you want to query unclaimed COMP rewards of
            );
    }
}

ethers.js

import ethers from "ethers";

const signer = new ethers.Wallet(
  process.env.PRIVATE_KEY,
  new ethers.providers.JsonRpcBatchProvider(process.env.RPC_URL)
);

const signerAddress = await signer.getAddress();

const cDaiAddress = "0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643";
const cCompAddress = "0x70e36f6BF80a52b3B46b3aF8e106CC0ed743E8e4";

const compDecimals = 18;

const lens = new ethers.Contract(
  "0x930f1b46e1D081Ec1524efD95752bE3eCe51EF67",
  [
    "function getUserUnclaimedRewards(address[] calldata, address) external view returns (uint256)",
  ],
  signer
);

const oracle = new ethers.Contract(
  "0x65c816077C29b557BEE980ae3cC2dCE80204A0C5",
  ["function getUnderlyingPrice(address) external view returns (uint256)"],
  signer
);

async function getUnclaimedComp() {
  const compRewards = await lens.getUserUnclaimedRewards(
    [cDaiAddress], // the markets to query unclaimed COMP rewards on
    signerAddress // the address of the user you want to query unclaimed COMP rewards of
  );

  return Number(ethers.utils.formatUnits(compRewards, compDecimals));
}

async function getUnclaimedCompUSD() {
  const compRewards = await getUnclaimedComp(
    [cDaiAddress], // the markets to query unclaimed COMP rewards on
    signerAddress // the address of the user you want to query unclaimed COMP rewards of
  );
  const oraclePrice = await oracle.getUnderlyingPrice(cCompAddress); // in (36 - nb decimals of WBTC = 28) decimals

  return (
    compRewards *
    Number(ethers.utils.formatUnits(oraclePrice, 36 - compDecimals))
  );
}

getUnclaimedComp().then((val) => console.log("unclaimed COMP rewards", val));
getUnclaimedCompUSD().then((val) =>
  console.log("unclaimed COMP rewards USD", val)
);

ERC4626 Vaults

Morpho's vaults are another way to interact with Morpho according to the ERC4626 standard.

Solidity

// SPDX-License-Identifier: GNU AGPLv3
pragma solidity ^0.8.13;

import {ISupplyVault} from "@morpho-org/morpho-tokenized-vaults/src/compound/interfaces/ISupplyVault.sol";

contract MorphoCompoundVaultSupplier {
    address public constant MC_DAI = 0xd99D793B8FDaE42C1867293C172b9CBBD3ea49FF;

    /// @notice Returns the amount of rewards this contract accrued through the vault.
    /// @return unclaimed The amount of COMP rewards this contract accrued through the vault.
    function getUnclaimedRewards() public view returns (uint256 unclaimed) {
        (, unclaimed) = ISupplyVault(MC_DAI).userRewards(address(this));
    }
}

ethers.js

import ethers from "ethers";

const signer = new ethers.Wallet(
  process.env.PRIVATE_KEY,
  new ethers.providers.JsonRpcBatchProvider(process.env.RPC_URL)
);

const daiDecimals = 18;
const compDecimals = 18;

const mcDai = new ethers.Contract(
  "0xd99D793B8FDaE42C1867293C172b9CBBD3ea49FF",
  SupplyVaultAbi,
  signer
);

async function getUnclaimedRewards(address) {
  const rewardsData = await mcDai.userRewards(address);

  return Number(ethers.utils.formatUnits(rewardsData.unclaimed, compDecimals));
}

getUnclaimedRewards(signer.address).then((val) =>
  console.log("Total COMP rewards", val)
);