Aave V2 Position Migrator (USE AT YOUR OWN RISK!)

Deployed on mainnet at: 0x393E3512d45a956A628124665672312ea86930Ba (View on Etherscan)

Deployed on Kovan at: 0xecc2a29ba60fa9e9a72ea92479cbaa2ea45ab7ce (View on Etherscan)

Demo mainnet TX hash (ETH collateral & DAI borrow): 0x1dd6be694c494204ac2fca46a596f86c09db835bbcb8fc8eca3127a6dfb5e5d8 (View on Etherscan)

This is a project aimed at aspiring developers looking to learn to build atop great protocols like Aave. If you choose to use it, make sure to follow the instructions below!

Instructions

If you choose to use my migrator, please make sure you stick to the following steps. Remember, the code is unaudited and, despite my best efforts to make it as hard as possible to lose funds, I can't guarantee anything. This is the wild west of DeFi, you need to know what you're doing!

There are essentially 3 steps you need to take to migrate:

1. Approve the migrator with your aToken(s). (I recommend an amount only slightly above your aToken balance, just to be safe.)
2. Delegate your chosen debtToken(s) credit to the migrator. (I recommend an amount only slightly above your borrows, again just to be safe.)
3. Migrate!

(Recommended) 4. Reset your allowances to 0 (just good practice, I use tac.dappstar.io)

The migrator's "migrate" function takes the following three parameters:

1. aTokens: An address array of your approved aTokens.
2. borrowReserves An address array of the underlying reserves of your borrowed assets. (Use the WETH address for ETH borrows)
3. rateModes An array of uint256 values, representing the interest rate modes you intend to receive for each borrowed reserve. You must have delegated credit using the corresponding debtToken.

Examples

Migrating ETH collateral with DAI borrow

You will need to...

1. Approve the migrator with your aETH.
2. Delegate your stable/variable debtDAI credit to the migrator.
3. Migrate with the following parameters:
   I. aETH address
   II. DAI address
   III. 1 or 2 (1 to receive stable debt, 2 to receive variable debt)

There is no interface currently available (that I know of) that allows you to delegate your credit with a nice UI, so I used Etherscan.

All in all, you should be done in a few minutes!

Migrating DAI collateral with ETH borrow

You will need to...

1. Approve the migrator with your aDAI.
2. Delegate your stable/variable debtWETH credit to the migrator.
3. Migrate with the following parameters: I. aDAI address
   II. WETH address (remember, use the WETH address if you're migrating borrowed ETH) III. 1 or 2 (1 to receive stable debt, 2 to receive variable debt)

That's it! Let's go over one more, more complex example.

Migrating LEND and USDC collateral with DAI and WBTC borrows

You will need to...

1. Approve the migrator with your aLEND.
2. Approve the migrator with your aUSDC.
3. Delegate stable/variable debtDAI credit to the migrator.
4. Delegate stable/variable debtWBTC credit to the migrator.
5. Migrate with the following parameters: I. aLEND address, aUSDC address II. DAI address, WBTC address III. 1/2, 1/2 (1 to receive stable debt, 2 to receive variable debt)

That about wraps it up for examples, if you have any questions don't hesitate to reach out!

Closing Remarks

Keep in mind that the more assets you have deposited/borrowed, the higher the gas limit will have to be.

Also, DO NOT send funds directly to the contract! The contract should never hold any funds whatsoever. If, by chance, you do end up sending tokens to it, let me know and I'll pull them out for you.

Lastly, and I cannot stress this enough, I am not an expert. Use the contract at your own risk. If you don't understand the code, I recommend waiting for the official migrator.