PoolTogether v5 Hyperstructure - Draw Auction Bot, Gather Contract State pt. 3

pt-v5-draw-2-get-state-pt-3.ts

export const getRelay = async (
  readProvider: Provider,
  auctionContracts: AuctionContracts,
  rngContext: RngDrawAuctionContext,
): Promise<RelayDrawAuctionContext> => {
  // Prize Pool Info
  const prizePoolOpenDrawEndsAt = await auctionContracts.prizePoolContract.openDrawEndsAt();

  const rewardTokenAddress = await auctionContracts.prizePoolContract.prizeToken();
  const rewardTokenContract = new ethers.Contract(rewardTokenAddress, ERC20Abi, readProvider);

  // Reward Token
  const rewardTokenSymbol = await rewardTokenContract.symbol();

  const rewardToken: TokenWithRate = {
    address: rewardTokenAddress,
    decimals: await rewardTokenContract.decimals(),
    name: await rewardTokenContract.name(),
    symbol: rewardTokenSymbol,
    assetRateUsd: REWARD_TOKEN_MARKET_RATE_USD,
  };

  // Relay Auction Info
  const rngRelayLastSequenceId = auctionContracts.rngAuctionContract.lastSequenceId();

  const lastSequenceCompleted = await auctionContracts.rngRelayAuctionContract.isSequenceCompleted(
    rngRelayLastSequenceId,
  );

  const rngRelayIsAuctionOpen =
    rngRelayLastSequenceId > 0 && rngContext.rngIsRngComplete && !lastSequenceCompleted;

  // Relayer Reward
  let rngRelayExpectedReward, rngRelayExpectedRewardUsd;
  if (rngRelayIsAuctionOpen) {
    const [randomNumber, completedAt] =
      await auctionContracts.rngAuctionContract.callStatic.getRngResults();
    const rngLastAuctionResult = await auctionContracts.rngAuctionContract.getLastAuctionResult();
    const elapsedTime = Math.floor(Date.now() / 1000) - Number(completedAt.toString());

    const rngRelayRewardFraction =
      await auctionContracts.rngRelayAuctionContract.computeRewardFraction(elapsedTime);

    const auctionResult = {
      rewardFraction: rngRelayRewardFraction,
      recipient: RELAYER_ADDRESS,
    };

    const auctionResults = [];
    auctionResults[0] = rngLastAuctionResult;
    auctionResults[1] = auctionResult;

    const rngRelayExpectedRewardResult =
      await auctionContracts.rngRelayAuctionContract.callStatic.computeRewards(auctionResults);
    rngRelayExpectedReward = rngRelayExpectedRewardResult[1];

    rngRelayExpectedRewardUsd =
      parseFloat(formatUnits(rngRelayExpectedReward.toString(), rewardToken.decimals)) *
      rewardToken.assetRateUsd;
  }

  return {
    prizePoolOpenDrawEndsAt,
    rewardToken,
    rngRelayIsAuctionOpen,
    rngRelayExpectedReward,
    rngRelayExpectedRewardUsd,
    rngRelayLastSequenceId,
  };
};