Polygon zkEVM 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/balancer/wsteth-usdc.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:

Arbitrum Mainnet Balancer wstETH-USDC
Impersonating...
0x6a74649aCFD7822ae8Fb78463a9f2192752E5Aa2
0x0345Bc8EDdbba03E11e366cFb4E2b232b8f1b739
Fetching Underlying at:  0x178E029173417b1F9C8bC16DCeC6f697bC323746
New Vault Deployed:  0xa4B5Ad0ca0E05ea73E59046CBCb6b3641318c9d3
Strategy Deployed:  0xf47FCd7914b24676C78222Af1431f4826B368F30
  Happy path
loop  0
old shareprice:  1000000000000000000
new shareprice:  1000000000000000000
growth:  1
instant APR: 0 %
instant APY: 0 %
loop  1
old shareprice:  1000000000000000000
new shareprice:  1000068403677420556
growth:  1.0000684036774206
instant APR: 26.04926042303911 %
instant APY: 29.74485660521895 %
loop  2
old shareprice:  1000068403677420556
new shareprice:  1000131319321304444
growth:  1.0000629113405168
instant APR: 23.95768699115301 %
instant APY: 27.061149684423057 %
loop  3
old shareprice:  1000131319321304444
new shareprice:  1000193897701257046
growth:  1.0000625701632813
instant APR: 23.827761013559037 %
instant APY: 26.896279294823277 %
loop  4
old shareprice:  1000193897701257046
new shareprice:  1000256321542735812
growth:  1.000062411739986
instant APR: 23.767430782293474 %
instant APY: 26.819795416465155 %
loop  5
old shareprice:  1000256321542735812
new shareprice:  1000318634555811359
growth:  1.0000622970450008
instant APR: 23.723753020397634 %
instant APY: 26.76445146036619 %
loop  6
old shareprice:  1000318634555811359
new shareprice:  1000380840931449184
growth:  1.0000621865608508
instant APR: 23.681678814655715 %
instant APY: 26.711162141078937 %
loop  7
old shareprice:  1000380840931449184
new shareprice:  1000442949039498353
growth:  1.0000620844637442
instant APR: 23.642798534864234 %
instant APY: 26.661937967659497 %
loop  8
old shareprice:  1000442949039498353
new shareprice:  1000479005035224559
growth:  1.0000360400318287
instant APR: 13.724644787553073 %
instant APY: 14.708122498585574 %
loop  9
old shareprice:  1000479005035224559
new shareprice:  1000479005035224559
growth:  1
instant APR: 0 %
instant APY: 0 %
earned!
APR: 18.24131008308575 %
APY: 20.005517445690145 %
    ✔ Farmer should earn money (32947ms)


1 passing (37s)

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.

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.