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10 08 base pricing graft #202

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19 changes: 15 additions & 4 deletions src/mappings/core.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@ import { updatePairDayData, updatePairHourData, updateTokenDayData, updateUniswa
import { ADDRESS_ZERO, BI_18, convertTokenToDecimal, createUser, FACTORY_ADDRESS, ONE_BI, ZERO_BD } from './helpers'
import { findEthPerToken, getEthPriceInUSD, getTrackedLiquidityUSD, getTrackedVolumeUSD } from './pricing'

const ALMOST_ZERO_BD = BigDecimal.fromString('0.000001')

function isCompleteMint(mintId: string): boolean {
return MintEvent.load(mintId)!.sender !== null // sufficient checks
}
Expand Down Expand Up @@ -408,10 +410,19 @@ export function handleSwap(event: Swap): void {
let bundle = Bundle.load('1')!

// get total amounts of derived USD and ETH for tracking
let derivedAmountETH = token1.derivedETH
.times(amount1Total)
.plus(token0.derivedETH.times(amount0Total))
.div(BigDecimal.fromString('2'))
const derivedEthToken1 = token1.derivedETH.times(amount1Total)
const derivedEthToken0 = token0.derivedETH.times(amount0Total)

// default to legacy calculation
let derivedAmountETH = derivedEthToken1.plus(derivedEthToken0).div(BigDecimal.fromString('2'))

// Only divide by 2 if both derivedETH values are non-zero
if (derivedEthToken0.le(ALMOST_ZERO_BD) || derivedEthToken1.le(ALMOST_ZERO_BD)) {
derivedAmountETH = derivedEthToken0.plus(derivedEthToken1)
} else {
derivedAmountETH = derivedEthToken0.plus(derivedEthToken1).div(BigDecimal.fromString('2'))
}

let derivedAmountUSD = derivedAmountETH.times(bundle.ethPrice)

// only accounts for volume through white listed tokens
Expand Down