• Geyser ( https://www.gysr.io/ ) is an open platform for yield farming and token distribution.
• But, that is only deployed on Mainnet. Therefore, users need to pay high gas fees and wait for long time to finalize transactions.
• To solve this issue from user perspective, I try to do that Geyser's smart contract works on Polygon. (Polygon mumbai testnet)

• Solidity (Solc): v0.6.11
• Truffle: v5.1.60
• web3.js: v1.2.9
• openzeppelin-solidity: v3.2.0
• ganache-cli: v6.9.1 (ganache-core: 2.10.2)

① Get API-key from Infura
https://infura.io/

② Add .env to the root directory.

• Please reference how to write from .env.example . (Please write 3 things below into .env )
  • MNEMONIC (Mnemonic)
  • INFURA_KEY (Infura key)
  • DEPLOYER_ADDRESS (Deployer address)
    https://github.com/masaun/geyser-on-polygon/blob/main/.env.example

• Idealy, MATIC tokens balance is more than 1 MATIC .
• Matic fancet: https://faucet.matic.network/ (Please select Mumbai network)

• Website: https://polygon.technology/
• Doc: https://docs.matic.network/docs/develop/getting-started
• MATIC fancet：https://faucet.matic.network/
• Network setting for MetaMask：https://github.com/masaun/tokenized-carbon-credit-marketplace#setup-wallet-by-using-metamask
• Polygon (Open Defi Hackathon)：https://gitcoin.co/issue/maticnetwork/matic-bounties/20/100025642

• Website: https://www.gysr.io/
• Doc: https://www.gysr.io/docs
• Smart contract：https://github.com/gysr-io/core