Polygon Chain: Harvest Strategy Development

This Hardhat environment is configured to use Mainnet fork by default and provides templates and utilities for strategy development and testing.

Installation

1. Run npm install to install all the dependencies.
2. Sign up on Alchemy. We recommend using Alchemy over Infura to allow for a reproducible Mainnet fork testing environment as well as efficiency due to caching.
3. Create a file dev-keys.json:

  {
    "alchemyKey": "<your-alchemy-key>"
  }

Run

All tests are located under the test folder.

1. Run npx hardhat test [test file location]: npx hardhat test ./test/curve/aave.js (if for some reason the NodeJS heap runs out of memory, make sure to explicitly increase its size via export NODE_OPTIONS=--max_old_space_size=4096). This will produce the following output:

Polygon Mainnet Curve Aave
Impersonating...
0xf00dD244228F51547f0563e60bCa65a30FBF5f7f
Fetching Underlying at:  0xE7a24EF0C5e95Ffb0f6684b813A78F2a3AD7D171
New Vault Deployed:  0xF8ce90c2710713552fb564869694B2505Bfc0846
Strategy Deployed:  0xDDa0648FA8c9cD593416EC37089C2a2E6060B45c
Strategy and vault added to Controller.
  Happy path
loop  0
old shareprice:  1000000000000000000
new shareprice:  1000000000000000000
growth:  1
loop  1
old shareprice:  1000000000000000000
new shareprice:  1000141138681462160
growth:  1.000141138681462
loop  2
old shareprice:  1000141138681462160
new shareprice:  1000327782939361291
growth:  1.000186617918892
loop  3
old shareprice:  1000327782939361291
new shareprice:  1000514426794411531
growth:  1.0001865826964256
loop  4
old shareprice:  1000514426794411531
new shareprice:  1000701097344949064
growth:  1.0001865745715788
loop  5
old shareprice:  1000701097344949064
new shareprice:  1000878677026348228
growth:  1.0001774552679819
loop  6
old shareprice:  1000878677026348228
new shareprice:  1001019907056855214
growth:  1.0001411060438679
loop  7
old shareprice:  1001019907056855214
new shareprice:  1001161152484596161
growth:  1.0001411015173078
loop  8
old shareprice:  1001161152484596161
new shareprice:  1001302413308521684
growth:  1.0001410969888065
loop  9
old shareprice:  1001302413308521684
new shareprice:  1001443692715028091
growth:  1.000141095641665
earned!
APR: 11.570408862519965 %
APY: 12.264303010549993 %
    √ Farmer should earn money (45307ms)


1 passing (1m)

Develop

Under contracts/strategies, there are plenty of examples to choose from in the repository already, therefore, creating a strategy is no longer a complicated task. Copy-pasting existing strategies with minor modifications is acceptable.

Under contracts/base, there are existing base interfaces and contracts that can speed up development. Base contracts currently exist for developing SNX and MasterChef-based strategies.

Note that the Universal Liquidator will not be available on BSC until a later stage of this project.

Contribute

When ready, open a pull request with the following information:

1. Instructions on how to run the test and at which block number

2. A mainnet fork test output (like the one above in the README) clearly showing the increases of share price

3. Info about the protocol, including:

   • Live farm page(s)
   • GitHub link(s)
   • Etherscan link(s)
   • Start/end dates for rewards
   • Any limitations (e.g., maximum pool size)
   • Current pool sizes used for liquidation (to make sure they are not too shallow)

   The first few items can be omitted for well-known protocols (such as curve.fi).

4. A description of potential value for Harvest: why should your strategy be live? High APYs, decent pool sizes, longevity of rewards, well-secured protocols, high-potential collaborations, etc.

A more extensive checklist for assessing protocols and farming opportunities can be found here

Deployment

If your pull request is merged and given a green light for deployment, the Harvest team will take care of on-chain deployment.