Skip to main content

Supply

Learn how to supply through Morpho, onchain via a smart contract & offchain via ethers.js.

Morpho AaveV2 Optimizer & Morpho CompoundV2 Optimizer allow anyone to supply to any open market and potentially benefit from higher yields via automatic matching, offchain through Etherscan or with ethers.js, or onchain using a smart contract. Here are concrete examples 👇

Morpho AaveV2 Optimizer​

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

import {IMorpho} from "./interfaces/IMorpho.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWETH9 {
    function deposit() external payable;
}

contract MorphoAaveV2Supplier {
    address public constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address public constant AWETH = 0x030bA81f1c18d280636F32af80b9AAd02Cf0854e;

    address public constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
    address public constant ADAI = 0x028171bCA77440897B824Ca71D1c56caC55b68A3;

    address public constant MORPHO = 0x777777c9898D384F785Ee44Acfe945efDFf5f3E0;

    function _supplyERC20(
        address _aToken,
        address _underlying,
        uint256 _amount
    ) internal {
        IERC20(_underlying).approve(MORPHO, _amount);
        IMorpho(MORPHO).supply(
            _aToken,
            address(this), // the address of the user you want to supply on behalf of
            _amount
        );
    }

    function supplyDAI(uint256 _amount) public {
        _supplyERC20(
            ADAI, // the DAI market, represented by the aDAI ERC20 token
            DAI,
            _amount
        );
    }

    function supplyETH() public payable {
        // first wrap ETH into WETH
        IWETH9(WETH).deposit{value: msg.value}();

        _supplyERC20(
            AWETH, // the WETH market, represented by the aWETH ERC20 token
            WETH,
            msg.value
        );
    }
}

Morpho CompoundV2 Optimizer​

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

import {IMorpho} from "@morpho-org/morpho-core-v1/contracts/compound/interfaces/IMorpho.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWETH9 {
    function deposit() external payable;
}

contract MorphoCompoundSupplier {
    address public constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address public constant CETH = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5;

    address public constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
    address public constant CDAI = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643;

    address public constant MORPHO = 0x8888882f8f843896699869179fB6E4f7e3B58888;

    function _supplyERC20(
        address _cToken,
        address _underlying,
        uint256 _amount
    ) internal {
        IERC20(_underlying).approve(MORPHO, _amount);
        IMorpho(MORPHO).supply(
            _cToken,
            address(this), // the address of the user you want to supply on behalf of
            _amount
        );
    }

    function supplyDAI(uint256 _amount) public {
        _supplyERC20(
            CDAI, // the DAI market, represented by the cDAI ERC20 token
            DAI,
            _amount
        );
    }

    function supplyETH() public payable {
        // first wrap ETH into WETH
        IWETH9(WETH).deposit{value: msg.value}();

        _supplyERC20(
            CETH, // the WETH market, represented by the cETH ERC20 token
            WETH,
            msg.value
        );
    }
}

ERC4626 Vaults​

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

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

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import {ISupplyVault} from "@morpho-org/morpho-tokenized-vaults/src/aave-v2/interfaces/ISupplyVault.sol";

contract MorphoAaveV2VaultSupplier {
    address public constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;

    address public constant MC_DAI = 0xd99D793B8FDaE42C1867293C172b9CBBD3ea49FF;
    address public constant MCH_DAI =
        0x5CBead740564A2173983E48f94F36357C1954EAE;

    function deposit(uint256 _amount) internal {
        IERC20(DAI).approve(MC_DAI, _amount);
        ISupplyVault(MC_DAI).deposit(
            _amount,
            address(this) // the address of the user you want to supply on behalf of
        );
    }

    function depositHarvest(uint256 _amount) internal {
        IERC20(DAI).approve(MCH_DAI, _amount);
        ISupplyHarvestVault(MCH_DAI).deposit(
            _amount,
            address(this) // the address of the user you want to supply on behalf of
        );
    }

    /// REWARDS ///

    function claimRewards() {
        ISupplyVault(MC_DAI).claimRewards(address(this));
    }

    function harvest() {
        ISupplyVault(MCH_DAI).harvest();
    }
}