PoolTogether Foundry Winner Calculator

A foundry-assisted toolkit for efficiently calculating winners of a prize pool draw.

Installation

1. clone this repo
2. install foundry
3. run npm i and then npm run build
4. navigate to the sol directory and run forge install and then forge build

WINDOWS INSTALLATION If you are installing on windows, you may need to increase your max filepath setting on git before running forge install by running the following command as administrator: git config --system core.longpaths true

How to Calculate Winners for each Vault

This script batches RPC queries for a given vault, so you'll need to run it for each vault that you want to check prizes for.

Step 1

Compile a list of potential winners that you want to check against, a given prize pool and vault combo and save the info to a file in the following format:

example-input.json

{
  "chainId": 10,
  "prizePoolAddress": "0xe32e5E1c5f0c80bD26Def2d0EA5008C107000d6A",
  "vaultAddress": "0xf0B19f02c63d51B69563A2b675e0160e1C34397C",
  "userAddresses": [
    "0xf54d071e929c02eb097cbf284e6e6a8bb924f2a7",
    "0x12dc4da5037152f97adc89a54c855e9bc84eeb7d",
    "0x299c8c6d973506fbf9245d95773d6ca1c5ccbfb3"
  ]
}

Step 2

Define your desired RPC URL as a local environment variable like so:

FWC_RPC_URL="https://my-rpc.xyz"

Step 3

Run the index.js script and pass in your input file path and desired output file path:

node index.js example-input.json example-output.json

When the script finishes, the results will be written to your output file location in the following format:

{
  "winners": [
    {
      "user": "0x12Dc4dA5037152F97aDC89a54C855e9bc84eEB7d",
      "prizes": {
        "5": [
          451,
          685,
          941
        ]
      }
    }
  ]
}

Optional Arguments

Optional arguments can be set in the input JSON file to change the behaviour of the script.

---

multicallBatchSize

Set the multicallBatchSize argument in the input json file to limit multicall sizes for your RPC calls. Some RPC enforce "gas" limits on read calls and will only accept certain batch sizes.

Example:

{
  "multicallBatchSize": 50
}

---

blockNumber

The blockNumber argument can be set to run the script at a specific block number instead of the current block. Must be either a number or string that can be parsed into a BigInt.

Example:

{
  "blockNumber": "10448512"
}

---

debug

The debug argument is an optional boolean. When set, some extra logs will be included in the output logs to help debug issues.

Example:

{
  "debug": true
}