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https://github.com/yearn/yearn-recycle
dai/usdc/usdt/tusd/ycrv ➝ yusd
https://github.com/yearn/yearn-recycle
dai ethereum vyper yearn-finance
Last synced: 3 months ago
JSON representation
dai/usdc/usdt/tusd/ycrv ➝ yusd
- Host: GitHub
- URL: https://github.com/yearn/yearn-recycle
- Owner: yearn
- License: mit
- Created: 2020-08-19T11:08:33.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2020-09-08T17:53:49.000Z (over 4 years ago)
- Last Synced: 2024-04-13T15:26:43.645Z (10 months ago)
- Topics: dai, ethereum, vyper, yearn-finance
- Language: Python
- Homepage:
- Size: 15.6 KB
- Stars: 56
- Watchers: 10
- Forks: 31
- Open Issues: 2
-
Metadata Files:
- Readme: readme.md
- License: license
Awesome Lists containing this project
README
# Yearn Recycle
A contract that recycles all your [DAI, USDC, USDT, TUSD, yCRV] into yCRV and further into yUSD vault.
## Usage
You need to grant allowances on up to five tokens to this contract before using it. This needs to be done for all non-zero amount and it only needs to be done once.
### Using Brownie
Use the Brownie script to automatically set all approvals and recycle all your coins into yUSD.
```python
$ brownie accounts import user keystore.json
$ brownie run recycle --network mainnet
```
### Using Etherscan
1. Call `approve(0x5F07257145fDd889c6E318F99828E68A449A5c7A, 115792089237316195423570985008687907853269984665640564039457584007913129639935)` for all non-zero balances:
- [DAI](https://etherscan.io/address/0x6B175474E89094C44Da98b954EedeAC495271d0F#writeContract)
- [USDC](https://etherscan.io/address/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48#writeProxyContract)
- [USDT](https://etherscan.io/address/0xdAC17F958D2ee523a2206206994597C13D831ec7#writeContract)
- [TUSD](https://etherscan.io/address/0x0000000000085d4780B73119b644AE5ecd22b376#writeProxyContract)
- [yCRV](https://etherscan.io/address/0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8#writeContract)
2. Call `recycle()` [here](https://etherscan.io/address/0x5F07257145fDd889c6E318F99828E68A449A5c7A#writeContract).
## Deployments
### v0.2.0
`0x5F07257145fDd889c6E318F99828E68A449A5c7A`
- Add support for yCRV deposits
- Add a Brownie script to set the needed approvals and recycle
- Honor allowances in `recycle()`, deposit `min(balance, allowance)`
- Add an ability to recycle custom amounts with `recycle_exact(dai, usdc, usdt, tusd, ycrv)`
Reviewed by:
- @iamdefinitelyahuman
### v0.1.0
`0x78e307F6e8584DaA0D85aDD918c0e3e4dD469A9C`
Initial release, features `recycle()` function which converts [DAI, USDC, USDT, TUSD] to yUSD.
Reviewed by:
- @samczsun
- @andrecronje
- @vshvsh
## Frontends
TBD
### Integration caveats
Check for `token.balanceOf(user)` and `token.allowance(user, recycle)` for each of DAI, USDC, USDT, TUSD, yCRV
For tokens with non-zero balances and `balance > allowance`, call `token.approve(recycle, MAX_UINT256)`
At this point you can call `recycle.recycle()`
You can get the exact amounts in and out from the transaction receipt event called `Recycled(user, sent_dai, sent_usdc, sent_usdt, sent_tusd, sent_ycrv, received_yusd)`
You can also allow depositing partial amounts (sliders?) or skipping some of the coins (checkboxes?). For this you need to calculate the exact amounts and pass them into `recycle.recycle_exact(dai, usdc, usdt, tusd, ycrv)`
Note that USDT is not ERC20-compliant, it doesn't return bool for `approve` and also requires first resetting the `allowance` to zero before changing it to another value.