Description

The prop-house-community package manages the voting strategies for Prop House communities.

Development

Install dependencies

yarn

Build

yarn build

Usage

import { getVotingPower } from '@prophouse/communities';

const votes = await getVotingPower(address, communityAddress, provider, blockTag);

Strategies

Strategies can be found in the strategies/ directory. A strategy is a function that returns a function of Strategy type. Put another way, custom strategies are functions that return the implementation of the base Strategy type.

// base Strategy type
export type Strategy = (
  userAddress: string,
  communityAddress: string,
  blockTag: number,
  provider: Provider,
) => Promise<number>;

// example strategy
export const myCustomStrategy = (optionalParams: string): Strategy => {
  return async (
    userAddress: string
    communityAddress: string,
    blockTag: number,
    provider: Provider,
  ) => {
    // my custom implementation
    return numVotesForAddress
    };
};

Considerations:

• Strategies may add additional parameters particular to the community (optional)
• Strategies may use the ethers.js Provider to make calls on-chain
• Strategies must return a Promise<number> denoting the number of votes the userAddress has for communityAddress at snapshot block blockTag.

Example

The balanceOfErc20 strategy requires two additional parameters (decimals and multiplier). It uses said parameters to implement and return a function of Strategy type.

export const balanceOfErc20 = (decimals: number, multiplier: number = 1): Strategy => {
  return async (
    userAddress: string,
    communityAddress: string,
    blockTag: number,
    provider: Provider,
  ) => {
    const contract = new Contract(communityAddress, BalanceOfABI, provider);
    const balance = await contract.balanceOf(userAddress, { blockTag: parseBlockTag(blockTag) });
    return new BigNumber(formatUnits(balance, decimals).toString()).times(multiplier).toNumber();
  };
};