bucketchanges.ts

	const exchangeDirect = await kit._web3Contracts.getExchange()
	const currentBlock = await kit.web3.eth.getBlockNumber()
	const batchSize = 200000
	for (let fromBlock = 0; fromBlock += batchSize; fromBlock < currentBlock) {
		const bucketUpdates = await exchangeDirect.getPastEvents(
			"BucketsUpdated", {
				fromBlock: fromBlock,
				toBlock: fromBlock+batchSize-1,
			})
		const rates = bucketUpdates.map((e) => ({
			blockN: e.blockNumber,
			rate: valueToBigNumber(e.returnValues.goldBucket).div(
					valueToBigNumber(e.returnValues.stableBucket)),
			}))
		const preUpdateRates = await concurrentMap(10, rates, async (rate) => {
			const preUpdateBuckets = await exchangeDirect.methods.getBuyAndSellBuckets(true).call(undefined, rate.blockN-1)
			const preUpdateRate = (
				valueToBigNumber(preUpdateBuckets[1]).div(
					valueToBigNumber(preUpdateBuckets[0])))
			return preUpdateRate
		})
		for (let idx = 0; idx < rates.length; idx += 1) {
			const rate = rates[idx]
			const preUpdateRate = preUpdateRates[idx]
			console.info(
				`${rate.blockN}: ${preUpdateRate.toFixed(4)} -> ${rate.rate.toFixed(4)} - ` +
				`${rate.rate.minus(preUpdateRate).abs().div(preUpdateRate).multipliedBy(100).toFixed(2)}%`)
		}
	}