harb/services/ponder/src/stake.ts

import { ponder } from 'ponder:registry';
import { positions, stats, STATS_ID, TAX_RATES } from 'ponder:schema';
import {
  ensureStatsExists,
  getStakeTotalSupply,
  parseRingBuffer,
  refreshOutstandingStake,
  serializeRingBuffer,
  updateHourlyData,
  checkBlockHistorySufficient,
  RING_BUFFER_SEGMENTS,
} from './helpers/stats';
import type { StatsContext } from './helpers/stats';

const ZERO = 0n;

async function getKraikenTotalSupply(context: StatsContext) {
  return context.client.readContract({
    abi: context.contracts.Kraiken.abi,
    address: context.contracts.Kraiken.address,
    functionName: 'totalSupply',
  });
}

function toShareRatio(share: bigint, stakeTotalSupply: bigint): number {
  if (stakeTotalSupply === 0n) return 0;
  return Number(share) / Number(stakeTotalSupply);
}

ponder.on('Stake:PositionCreated', async ({ event, context }) => {
  await ensureStatsExists(context, event.block.timestamp);

  const stakeTotalSupply = await getStakeTotalSupply(context);
  const shareRatio = toShareRatio(event.args.share, stakeTotalSupply);
  const totalSupplyInit = await getKraikenTotalSupply(context);

  await context.db.insert(positions).values({
    id: event.args.positionId.toString(),
    owner: event.args.owner as `0x${string}`,
    share: shareRatio,
    taxRate: TAX_RATES[Number(event.args.taxRate)] || 0,
    kraikenDeposit: event.args.kraikenDeposit,
    stakeDeposit: event.args.kraikenDeposit,
    taxPaid: ZERO,
    snatched: 0,
    creationTime: event.block.timestamp,
    lastTaxTime: event.block.timestamp,
    status: 'Active',
    createdAt: event.block.timestamp,
    totalSupplyInit,
    totalSupplyEnd: null,
    payout: ZERO,
  });

  await refreshOutstandingStake(context);
});

ponder.on('Stake:PositionRemoved', async ({ event, context }) => {
  await ensureStatsExists(context, event.block.timestamp);

  const positionId = event.args.positionId.toString();
  const position = await context.db.find(positions, { id: positionId });
  if (!position) return;

  const totalSupplyEnd = await getKraikenTotalSupply(context);

  await context.db.update(positions, { id: positionId }).set({
    status: 'Closed',
    closedAt: event.block.timestamp,
    totalSupplyEnd,
    payout: (position.payout ?? ZERO) + event.args.kraikenPayout,
    kraikenDeposit: ZERO,
    stakeDeposit: ZERO,
  });

  await refreshOutstandingStake(context);

  if (checkBlockHistorySufficient(context, event)) {
    await updateHourlyData(context, event.block.timestamp);
  }
});

ponder.on('Stake:PositionShrunk', async ({ event, context }) => {
  await ensureStatsExists(context, event.block.timestamp);

  const positionId = event.args.positionId.toString();
  const position = await context.db.find(positions, { id: positionId });
  if (!position) return;

  const stakeTotalSupply = await getStakeTotalSupply(context);
  const shareRatio = toShareRatio(event.args.newShares, stakeTotalSupply);

  await context.db.update(positions, { id: positionId }).set({
    share: shareRatio,
    kraikenDeposit: BigInt(position.kraikenDeposit ?? ZERO) - event.args.kraikenPayout,
    stakeDeposit: BigInt(position.stakeDeposit ?? ZERO) - event.args.kraikenPayout,
    snatched: position.snatched + 1,
    payout: BigInt(position.payout ?? ZERO) + event.args.kraikenPayout,
  });

  await refreshOutstandingStake(context);

  if (checkBlockHistorySufficient(context, event)) {
    await updateHourlyData(context, event.block.timestamp);
  }
});

ponder.on('Stake:PositionTaxPaid', async ({ event, context }) => {
  await ensureStatsExists(context, event.block.timestamp);

  const positionId = event.args.positionId.toString();
  const position = await context.db.find(positions, { id: positionId });
  if (!position) return;

  const stakeTotalSupply = await getStakeTotalSupply(context);
  const shareRatio = toShareRatio(event.args.newShares, stakeTotalSupply);

  await context.db.update(positions, { id: positionId }).set({
    taxPaid: BigInt(position.taxPaid ?? ZERO) + event.args.taxPaid,
    share: shareRatio,
    taxRate: TAX_RATES[Number(event.args.taxRate)] || position.taxRate,
    lastTaxTime: event.block.timestamp,
  });

  // Only update ringbuffer if we have sufficient block history
  if (checkBlockHistorySufficient(context, event)) {
    const statsData = await context.db.find(stats, { id: STATS_ID });
    if (statsData) {
      const ringBuffer = parseRingBuffer(statsData.ringBuffer as string[]);
      const pointer = statsData.ringBufferPointer ?? 0;
      const baseIndex = pointer * RING_BUFFER_SEGMENTS;

      ringBuffer[baseIndex + 3] = ringBuffer[baseIndex + 3] + event.args.taxPaid;

      await context.db.update(stats, { id: STATS_ID }).set({
        ringBuffer: serializeRingBuffer(ringBuffer),
        totalTaxPaid: statsData.totalTaxPaid + event.args.taxPaid,
      });
    }

    await updateHourlyData(context, event.block.timestamp);
  } else {
    // Insufficient history - update only totalTaxPaid without ringbuffer
    const statsData = await context.db.find(stats, { id: STATS_ID });
    if (statsData) {
      await context.db.update(stats, { id: STATS_ID }).set({
        totalTaxPaid: statsData.totalTaxPaid + event.args.taxPaid,
      });
    }
  }

  await refreshOutstandingStake(context);
});

ponder.on('Stake:PositionRateHiked', async ({ event, context }) => {
  const positionId = event.args.positionId.toString();
  await context.db.update(positions, { id: positionId }).set({
    taxRate: TAX_RATES[Number(event.args.newTaxRate)] || 0,
  });
});